Category: Sound & Screen Systems

Professional sound and screen system installation and rentals in the Western Cape.

Digital Billboard Benefits For Schools In South Africa

Digital Billboard Benefits For Schools In South Africa

Various schools and educational institutions have been embracing Digital Billboard in their business practices for decades. However, Digital Billboard for schools has only gotten better over the years. It is an efficient and cost-effective way for these institutions to provide information to their staff, students, and parents. If you haven’t heard of Digital Billboard for education, this short article will explain its benefits, and how it can be used.

What is the Digital Billboard Benefits For Schools In South Africa? Digital Billboards are electronic signs that help convey information. You may have seen them outside of stores or in banks, gyms, churches, schools, and government buildings. Its applications are endless. The process uses advanced SMD & DIP LED Technology to display information & media. The purpose of a Digital Billboard is to provide information. Depending on its use, you can use it to educate, entertain, or inform students, teachers, and parents.

Digital Billboard for schools has almost unlimited uses. For this reason, you will find Digital Billboard all around you, wherever you go. Business owners, managers, and teachers can modify these signs to meet their unique needs. Digital Billboard allows for customization through various solutions, making it easy to manage. For schools, Digital Billboard is an absolute necessity in this contemporary age. Some of the benefits of Digital Billboard for schools and education include: informing students about the weather, school dances, bake sales. Highlight important events or students with above-average grades. Inform parents of PTA meetings and other events. Your imagination is the limit!

If you would like to know exactly how you could increase efficiency at your institution then we can help. Connect with us and we will see what we can do for you. Our engineers will be more than happy to formulate a plan suited to your situation.

Indoor LED Screens For Sale in South Africa

Share, inform, communicate & promote seamlessly in an instant.

Large format Indoor LED Screens are perfect for environments with lots of foot traffic like department stores, malls, airports, and any indoor environment with large open space. Digitizing open space be it on ground level or elevated gives the user a wide variety of functionality and instant ability to visually communicate with everyone in the space.

What are the advantages of Indoor LED Screens for advertising?

One of the advantages of our Indoor LED Screens are their large size. These large LED screens provide a high image resolution, perfect for playing any video content with the highest quality.

Another advantage of our displays is their great brightness. It is much more than any television or monitor, which means that the displayed images can be viewed without any problem even in broad daylight. These features make digital displays a profitable and ideal product to place on the roof of any building.

Here are the main benefits of our Indoor LED Screens for advertising:

  • High visual impact
  • Great luminosity
  • High profitability
  • Large Format

The technical specs of our Indoor LED Screens

Every Indoor LED Screen should have every professional feature so that it can work 24 hours without any interruption.

Under Indoor LED Screens, we select the best electronic components to create Indoor LED Screens for video and high definition image 24/7 broadcasting. Placing Indoor LED Screens on the inside of your public venue requires a well-constructed Indoor LED Screen System that is robust, has the necessary functionality & image quality.

What are Digital Billboards?

Digital billboards are electronic image displays that present multiple static advertisements on a rotating basis. Larger outdoor billboards appear alongside roadways, while smaller indoor billboards appear in entertainment venues, malls, etc. Outdoor digital billboards use the same dimensions as standard, static billboards. The screen surface comes in standard 1sqm panels and because they are modular, screen surfaces can be build to any size. When a curved screen is required we follow the same modular stacking principals. These billboards use hundreds of light-emitting diodes (LEDs) to create an image. Larger indoor digital billboards use the same LED-based displays as outdoor digital billboards. Smaller indoor digital billboards may use liquid crystal display (LCD) video screens, similar to computer monitors and televisions. Digital billboards may be mounted on a post or wall using a steel structure or “enclosure” built for the location and screen system.

Outdoor & Indoor Digital Billboard Services

From our offices in Wetton Industrial(close to Kenilworth Racecourse) & Ennerdale Industrial in Johannesburg, we offer the following LED Screen products & services:

  1. LED screen panel assembly and supply
  2. LED screen enclosure manufacturing (we can do any design/shape/size)
  3. Structure design & fit
  4. Screen panel design and fit
  5. Screen system configuration
  6. Screen bulb calibration
  7. LED screen and digital billboard maintenance and servicing
  8. LED screen upgrading for desired functionality

Our outdoor digital billboard panels have proven their ability to withstand the harshest weather conditions, including the 2016 “Cape Storm” that damaged thousands of buildings in Cape Town (including parts of our warehouse!).

Benefits Of Digital Billboard Maintenance

Preventative maintenance plan

What we offer:
  1. Quick onsite repairs for registered customers
  2. Design and completion of a preventative maintenance plan
  3. Extend the life expectancy of the screen system
  4. Have an expert to advise on efficiency all round, based on years of experience owning and supplying the technology
  5. 24-hour standby technical support
  6. Can fully repair ANY faults
  7. Can engineer the core parts for application-specific screen use.
  8. Can upgrade existing screens quickly and easily(T’s & C’s Apply)

Available LED Screen Configurations

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Our services include the supply of Pro Audio & LED Digital Display systems. We offer digital advertising billboards and outdoor digital displays across Africa as well as in Johannesburg, Durban, Cape Town, Pretoria and in South Africa, Eastern Cape, Free State, Gauteng, KwaZulu-Natal, Limpopo, Mpumalanga, North West, Northern Cape and the Western Cape.

How To Apply For A Outdoor Digital Billboard Licence in South Africa

The conditions and principles contained in this subsection are relevant to all sign types with certain exceptions as indicated.

5.1.1 Amenity and Decency

(a) No sign, as permitted by SAMOAC, shall in the opinion of the controlling authority –

(i) be detrimental to the environment or to the amenity and local character of a human living environment by reason of size, shape, color, the intensity of illumination, quality of design or materials or for any other reason;

(ii) unreasonably obscure, partially or wholly, any sign owned by another person previously erected and legally displayed; or

(iii) be in its content objectionable, indecent or suggestive of indecency or prejudicial to the public morals.

(b) No sign or advertisement shall be displayed if deemed unacceptable by the Advertising Standards Authority of South Africa (ASA).

5.1.2 Safety

(a) No advertisement or advertising structure, as permitted by SAMOAC,

(i) shall in the opinion of the controlling authority constitute a danger to any person or property;

(ii) shall in the opinion of the roads authority be so placed or contain an element which distracts the attention of drivers in a manner likely to lead to unsafe driving conditions;

(iii) shall in the opinion of the roads authority be illuminated to the extent that it causes discomfort to or inhibits the vision of approaching pedestrians or drivers;

(iv) shall be attached to a road traffic sign or signal, combined with a road traffic sign or signal [unless specifically provided for in the Southern African Development Community Road Traffic Signs Manual (SADC-RTSM) or the South African Road Traffic Signs Manual (SARTSM)], obscure a road traffic sign or signal, create confusion with a road traffic sign or signal, interfere with the functioning of a road traffic sign or signal or create a road safety hazard in the opinion of the roads authority;

(v) shall in the opinion of the roads authority obscure a pedestrian’s or driver’s view of pedestrians, road or rail vehicles and features of the road, railway or pavement such as junctions, bends and changes in width;

(vi) shall project over a pedestrian or cycle circulation route, unless the clear height of such sign exceeds 2,3 m;

(vii) shall obstruct any fire escape or the means of egress to a fire escape or obstruct or interfere with any window or opening required for ventilation purposes;

(viii) shall exceed the minimum clearance with regard to overhead power lines as prescribed in regulation 15 of the Electrical Machinery Regulations (GN R1593 in GG. 11458 of 12 August 1988 as amended). (Permission must be obtained from the 5.1 General Conditions and Principles SAMOAC AUGUST 2010 53 relevant supply authority before any advertising structure may be erected in a power line servitude);

(ix) shall, if affixed or attached, be affixed or attached in any way that may constitute a danger to the public.

(b) Signs or advertisements positioned along roads and specifically targeting the road user shall be concise and legible and shall comply with the following requirements:

(i) No sign displaying a single advertisement or message shall exceed 10 “bits” of information. No combination sign or any other sign displaying more than one advertisement or message shall contain more than 6 “bits” of information per enterprise, service or property or per individual advertisement or message displayed on a combination sign. Every 5 letters or numbers (digits) shall be counted as one bit of information and every symbol or logo as half a bit of information.

(ii) Street numbers indicating specific premises shall have a minimum size of 200 mm and a maximum size of 500-750 mm.

(iii) No message shall be spread across more than one sign or sign panel.

(c) The colors red, amber or green shall not be displayed on any advertisement or sign which is positioned within the line of sight of any traffic signal aspect if viewed from a distance where the relevant aspect should be conspicuous, as required in Volume 3 of the South African Road Traffic Signs Manual.

5.1.3 Design and Construction

Any sign, as permitted by SAMOAC –

(i) shall, in the opinion of the controlling authority, be neatly and properly constructed and executed and finished in a workmanlike manner;

(ii) shall, in the opinion of the controlling authority, not be detrimental to or have a negative aesthetic impact on the urban design, streetscape or the character of the surrounding area by way of the design of the structure or device;

(iii) shall, in the opinion of the controlling authority, have a neat appearance and shall consist of durable materials in accordance with the function, nature and permanence of the advertisement, sign or structure and materials such as cloth, canvas, vinyl, cardboard, paper or synthetic cardboard should be used only when essential to the nature and function of a particular sign;

(iv) shall, in the opinion of the controlling authority, not deface building facades with electrical services provisions and other accessories;

(v) shall in the opinion of the controlling authority, have a neat and professional appearance in terms of advertisement content and signwriting (untidy handwritten messages should be avoided);

(vi) shall, in the opinion of the controlling authority, be rigidly and securely attached, supported or anchored in a safe manner and so that unwanted movement in any direction is prevented; 5.1 General Conditions and Principles SAMOAC AUGUST 2010 54

(vii) shall be capable of effectively securing, supporting and maintaining not less than twice it’s mass with the addition of any force to which the sign may be subjected, including wind pressure;

(viii) shall wherever necessary in accordance with the nature of the sign and when attached to brickwork, masonry or concrete, be securely and effectively attached thereto by means of bolts securely embedded in such brickwork, masonry or concrete or passing through the same and secured on the opposite side;

(ix) shall, when attached to conservation-worthy buildings, be attached with the necessary expert advice in order to prevent damage to such buildings;

(x) shall, if painted, be painted with weatherproof paint of good quality.

(b) Any advertiser or media owner –

(i) shall not use water-soluble adhesive, adhesive tape or similar material to display or secure any sign or advertisement elsewhere than on a billboard, board or any structure provided for this purpose;

(ii) shall not use wire or nails to attach a sign;

(iii) shall have all exposed metalwork of any sign painted or otherwise treated to prevent corrosion and all timber treated to prevent decay; and

(iv) shall have measures taken to prevent the entry of water into and the accumulation of water or moisture on or in any sign or any part of its supporting framework, brackets or other members.

(c) Glass

(i) All glass used in signs (other than glass tubing used in neon and similar signs) shall be safety glass at least 3 mm thick.

(ii) Glass panels used in signs shall not exceed 0,90 m2 in area, each panel is securely fixed in the body of the sign, structure or device independently of all other panels.

(d) Electrical (i) Every illuminated sign and every sign in which electricity is used

(aa) shall have power cables and conduit containing electrical conductors positioned and fixed so that they are not unsightly in the opinion of the controlling authority;

(bb) shall be constructed of material which is not combustible;

(cc) shall be provided with an external switch in an accessible position whereby the electricity supply to the sign may be switched off; and

(dd) shall be wired and constructed in accordance with and subject to the provisions of the controlling authority’s electricity supply by-laws and any other legislation applicable to electric signs.

(ii) All signs that could interfere with radio or television reception must be equipped with 5.1 General Conditions and Principles SAMOAC AUGUST 2010 55 suppressors that eliminate all forms of interference.

(e) Damage to Property and Vegetation

(i) No person shall, in the course of erecting or removing any sign, advertisement, structure or device, cause damage to any tree, electrical standard or service or other public installation or property.

(ii) Media owners will accept responsibility for all trees within the line of sight of signs or advertising structures. If any such trees are removed, cut down or trimmed down without the permission of the controlling authority, the relevant media owner will be responsible for replacing it in accordance with specifications laid down by the controlling authority.

(f) The construction of any sign as permitted by SAMOAC shall be done in accordance with the Construction Regulations (GN R1010 in GG 25207 of 18 July 2003)


(a) Any sign, as permitted by SAMOAC –

(i) shall be serviced on a regular basis; and

(ii) shall be maintained in good repair and in a safe, clean and neat condition and according to the highest standards as regards quality of structures, posting, signwriting, and general sign content. (b) The owner of any land or building on which a sign is displayed or erected, or to which a sign is attached, and the owner of any such sign shall be jointly and severally responsible for the maintenance in a safe and proper condition and for the cleaning and the repainting of any such sign.

(c) The maintenance of any sign and the replacement of any sign contents shall be done in accordance with the Construction Regulations (GN R1010 in GG 25207 of 18 July 2003) and the General Safety Regulations (GN R1031 in GG 10252 of 30 May 1986 as amended).

Position and Location

(a) Signs within road reserves (including site boundary signage) shall be restricted to the absolute minimum. The following principles shall be applied in this regard:

(i) In order to prevent advertising clutter and information overload within the immediate road environment, which may compete with road signs and signals, masses of smaller signs should be avoided by allowing a limited number of acceptable signs of larger proportions instead.

(ii) If the display of any advertisement or sign within a road reserve, is not in the general interest of the public, traffic safety principles will dictate whether such a sign can be allowed or not.

(b) Restricted areas at street corners should be seen as the most sensitive areas in terms of road safety and the consideration of any sign-in such areas shall take place with the greatest of discretion.

(c) Signs, as permitted by SAMOAC,

(i) shall not be positioned on a road island or road median with the exception of Class 1(a) 5.1 General Conditions and Principles SAMOAC AUGUST 2010 56 ~ Gantry Billboards which are allowed on road islands or road medians other than freeways in accordance to permitted areas of control as indicated in Fig.7;

(ii) shall not be suspended across a road reserve and road surface with the exception of the following signs which are allowed across roads other than freeways in accordance to permitted areas of control:

Class 1(a) ~ Gantry billboards

Class 2(i) ~ Advertisements on Towers, Bridges, and Pylons

Class 7(c) ~ Signs for Sporting Events, Festivals & Exhibitions when roads are closed for motorized traffic

(iii) shall not be allowed on a road surface with the exception of Class 6(a) ~ Vehicular Advertising in accordance to permitted areas of control ;

(iv) shall not be erected within a road reserve or the limited use area outside the road reserve boundary of freeways, as indicated in Figure 4, with the following exceptions:

(aa) The following signs may be allowed within all road reserves including freeways and the limited use areas next to freeways in accordance to permitted areas of control:

Class 5(b) ~ Road Traffic Project Signs

Class 5(d) ~ Gateway Signs

Class 6(a) ~ Vehicular Advertising

Class 7(b) ~ Project Boards that concern road construction

Class 7(c) ~ Signs for Sporting Events, Festivals & Exhibitions when roads are closed for motorized traffic

(bb) Class 5(a) ~ Service Facility Signs may be allowed within the limited use area along freeways in accordance to permitted areas of control.

(cc) The following signs may be allowed within the limited use area along freeways, in accordance to permitted areas of control as indicated in Fig.7 if the main building housing an enterprise is within 50 meters from the road reserve boundary of a freeway and if there are no other appropriate means of identifying that particular enterprise from another public road carrying traffic passing through:

Class 2(c) ~ Wall Signs

Class 2(f) ~ Projecting Signs

Class 2(g) ~ Veranda, Balcony and Under Awning Signs

(dd) The following signs may be allowed within all road reserves excluding freeways in accordance to permitted areas of control:

Class 1(a) ~ Gantry Billboards

Class 1(d) ~ Small Billboards

Class 2(i) ~ Advertisements on Towers, Bridges, and Pylons

Class 4(a) ~ Street Furniture & Large Posters (Limited to bus shelters, telephone booths, and automatic public toilets)

Class 4(b) ~ Forecourt Signs

Class 6(d) ~ ‘Walking’ Sandwich Boards & Other Portable Notices

Class 7(f) ~ Lamppost Advertising

Class 8(a) ~ Security Signs (Only for indicating entrances to security schemes) 5.1 General Conditions and Principles SAMOAC AUGUST 2010 57 (ee) The following signs may be allowed within all road reserves excluding freeways in accordance to permitted areas of control, but only as site boundary signage:

Class 2(c) ~ Wall Signs

Class 2(d) ~ Signs & Murals Painted on Walls & Roofs

Class 2(e) ~ Signs Incorporated in the Fabric of a Building

Class 2(f) ~ Projecting Signs

Class 2(g) ~ Veranda, Balcony and Under Awning Signs

Class 2(h) ~ Window Signs

Class 3(a) ~ On-Premises Business Signs in Urban Areas

Class 3(b) ~ Miscellaneous Signs for Urban Residential Oriented Land Use and Community Services

Class 3(c) ~ Signs for Agricultural and Related Land Use in Rural & Natural Areas

Class 7(a) ~ Construction Site Advertisements

Class 7(b) ~ Project Boards that do not concern road construction

Class 7(d) ~ Estate Agents’ Boards

Class 7(e) ~ Auction Signs

Class 7(h) ~ Temporary Window Signs

(v) shall not be permitted within a restricted area at urban street corners, with the exception of the following signs which may be allowed only on the on-site part of the restricted area and on the site boundaries enclosed in the restricted area (site boundary signage) and in accordance to permitted areas of control:

Class 2(c) ~ Wall Signs

Class 2(d) ~ Signs & Murals Painted on Walls & Roofs

Class 2(e) ~ Signs Incorporated in the Fabric of a Building

Class 2(f) ~ Projecting Signs

Class 2(g) ~ Veranda, Balcony and Under Awning Signs

Class 2(h) ~ Window Signs

Class 3(a) ~ On-Premises Business Signs in Urban Areas

Class 3(b) ~ Miscellaneous Signs for Urban Residential Oriented Land Use and Community Services

Class 4(b) ~ Forecourt Signs

Class 7(a) ~ Construction Site Advertisements

Class 7(b) ~ Project Boards

Class 7(d) ~ Estate Agents’ Boards

Class 7(e) ~ Auction Signs

Class 7(h) ~ Temporary Window Signs

Class 8(a) ~ Security Signs These signs shall be allowed only as locality-bound signs and only if there is no other possibility to display such signs or any other sign type fulfilling the same function outside a restricted area. Any illuminated sign allowed in this manner within restricted areas at signalized street corners as indicated in Figure 6 shall not contain the colors red, green or amber. (d) No signs, as permitted by SAMOAC, shall be staked or pegged into the ground within any road reserve with the exception of site boundary signage.


The following maximum luminance levels per square meter are applicable for all classes of advertisements in SAMOAC where illumination is permitted (as determined by the International Commission on Illumination):

(b) The light source emanating from floodlights shall not be visible to traffic traveling in either direction.

(c) Floodlighting shall be positioned to ensure effective distribution and minimize light wastage or ‘spill’.

(d) In respect of urban freeways, irrespective of the area of control, the following sign classes may not be illuminated in any way unless the freeway is lit by overhead lighting over the full distance within which the advertising sign is visible from the freeway:

Class 1(b) ~ Large billboards

Class 1(c) ~ Medium Billboards

Class 1(d) ~ Small Billboards

Class 2(b) ~ Roof Signs

Class 2(c) ~ Wall Signs

Class 2(d) ~ Signs & Murals Painted on Walls & Roofs

Class 7(a) ~ Construction Site Advertisements

(e) No non-locality bound sign may be illuminated between 23:00 and daybreak. 5.1.7 Indemnity

(a) The person in respect of a sign accepts, despite any approval by the controlling authority, all responsibility and liability for and indemnifies the controlling authority against any claim that may arise from the erection, display, and construction of the sign.


Within visual zones, the responsible roads authority may, after an OAPA process, identify areas in which relaxation may be allowed by changing such visual zone areas back to the original area of control (minimum or partial) onto which the visual zone (maximum control) was superimposed. In such instances, the responsible roads authority may also stipulate any terms and conditions additional to the requirements of this manual they may require compliance with.

Sound Waves Explained

What is sound:

Sound is a type of energy made by vibrations. When any object vibrates, it causes movement in the air particles. These particles bump into the particles close to them, which makes them vibrate too causing them to bump into more air particles. This movement, called sound waves, keeps going until they run out of energy.

How does sound work:

Sound waves exist as variations of pressure in a medium such as air. They are created by the vibration of an object, which causes the air surrounding it to vibrate. The vibrating air then causes the human eardrum to vibrate, which the brain interprets as sound.

If you have any questions comment below. If you would like to know more about how to test sound the read here.

Cape Town International Jazz Festival 2019

Our crew responsible for the international live sensation Afro Fiesta were in full force at the Cape Town International Convention Center.

Our specialty service is to work closely with professional performers and to develop a technical template for rehearsals and live shows. Often we do sound design, recording, and reinforcement for an artist or band. This means we develop a flow of work that will guarantee consistency in the response of the music of a particular artist. In some cases, we simply support engineers that do what we do, when they come through our town and need support from engineers familiar with tours and concerts.

How To Mesure sound

Sound is a pressure wave caused when something vibrates, making particles bump into each other and then apart. The particles vibrate back and forth in the direction that the wave travels but do not get carried along with the wave. When you clap your hands, you force air particles together and then apart. This effect ripples out and away from your hands as a small group of sound waves. The particles close to your hands are pushed outwards and bump into neighboring particles, and these then move and bump into more particles. The effect is very much like dropping a stone into a pool of water and causing a ripple pattern (sound waves) extending outwards from the original source (your clapping hands). Similar to water ripples, pressure waves move outwards from the sound source. These changes in particle spacing are also changes in pressure. Pressure increases when particles are squeezed together and reduces when they move apart. It is these changes in pressure that can be detected by organs such as the human ear and are sensed as sound. We describe the sounds that we hear using several different terms and measure them in different ways.


Volume(also called loudness) relates to the maximum pressure produced as particles are squeezed together as they are made to vibrate. This is also related to the maximum distance particles are moved from their normal position as they vibrate, much like how tall the ripples are in the pool mentioned before. When you show soundwaves on a graph, the amplitude is the height of the waves from their middle position and reflects how loud the waves are. The loudness of sound is measured in decibels (dB). This is actually a measure of intensity, which relates to how much energy the pressure wave has. Decibels are a relative measurement. They relate the intensity of a pressure wave to normal or pressure. For the human ear in air, the quietest noises we hear are around 10dB whereas sounds of 130dB are considered painful.

Water is much denser than air, so the standard pressure is different. This means that you cannot directly convert decibel levels from air to water. (To convert from a decibel reading in the air to a decibel reading in water, you should add 61.5dB.)


Image: FrequencyPitchrelates to the frequency, or how many times a second the particles vibrate. The distance between one wave and the next gives the wavelength. For sounds all traveling at the same speed, high-frequency (high-pitched) sounds have waves very close together. Low-frequency sounds have a greater distance between each wave. An extreme example is the low-pitch calls made by humpback whales, which can have up to 100 meters between the pressure peaks of their sound waves. Frequency is measured in hertz (Hz). For sound, this means the number of pressure waves per second that would move past a fixed point. It is also the same as the number of vibrations per second the particles are making as they transmit the sound.

A sound of 10Hz means that 10 waves would pass a fixed point in 1 second. (Sound travels at a speed of 343 meters per second in air or 1,484 meters per second in water.) Humans can normally hear sounds between 20Hz and 20,000Hz (20kHz).


Noise is a very subjective term. It can refer to any unwanted sound but is more correctly used to describe the sound that isn’t rhythmic or pure. When the sound waves form a single sine-shaped wave on a graph, we hear the sound like a pure note. Tuning forks produce a pure sound, one-note (a single frequency) and a very smooth line on a graph. When we combine pure notes, we can create harmonics. Harmonics are the basis of all musical instruments and result from overlaying pure notes. 

Noise is produced when the notes aren’t pure. The trace on the graph is bumpy and random. Our ears detect this as a less pleasant sensation and often try to screen it out. In terms of listening underwater, what we mainly hear is noise – a jumbled mess of sounds with no repeating pattern or clear pure notes.

What Should A Live Sound Engineer Do For You?

If you employ AV services then its best to have knowledge of how it all works. Starting with the operators. Just like most ficilitation, the more you know about the processes and people involved, the better. Competancy and discretion is key when smooth running event AV essential.


Alive sound engineer manages Audio Equipment such as mixing consoles and audio processing equipment at live events. By default the live sound engineer follows through with his or her way of getting a reasonable clear sound from the sound system & room combination.

Lynthia band sound mixing at Knead Bakery Palmyra
Lynthia doing live sound mixing

The sound engineers job is to see that the sound system functions correctly and then looks to interpret feedback and requests from stage professionals and clients. In some cases people from the audience bring to their attention, something overlooked(or overheard?).

Some thoughts:

In most cases, sound engineers can get a sound quality that everyone is happy with the first time around. However, even the best sound engineers in the world ask for feedback on the way things sound. The best sounding albums and live shows are put together with input from several people as “good sound” is relative.

A “good” live sound engineer is one that has experience dealing with any of the thousands of issues that could arise before, during or after an event.

Good sound can be achieved with enough time and communication. Dealing with the hundreds of things that could go wrong in times when smooth sailing is most important, requires experience.

JohnnyB White: International live sound engineer +20 years experiance

If you employ AV services then its best to have some knowledge of how it works.

If you have any questions, post them in the comments below.

If you want more, signup to our newsletter below.

Difference Between Active & Passive Sound Systems

Difference Between Active & Passive Sound Systems

The Fundamental Difference Between Active & Passive Sound Systems is that active systems have amplifiers built into either the speakers or the mixer. Active systems are generally used for small to medium applications. Passive systems are popular for large format events.

Pros & Cons: Active Sound Systems

  • Shorter setup times, which are important for any professional setup.
  • They take up less space for transport, which is important for those with small vehicles.
  • Designed with portability in mind.
  • Can be difficult to service, as the built-in amplifier boards are specific to each model of speaker.
  • They require 2 cables (power and signal), which can be a detriment if they are set up far apart from each other.
  • Often more expensive and lower powered than similar passive speakers. Less bang for more buck.

Pros & Cons: Passive

  • Cheaper to build as you can combine many different models and brands of speakers and amplifiers. An inexpensive system can start with almost any set of passive speakers and almost any power amp.
  • If an amplifier fails, it can be exchanged with almost any available amp.
  • Amplifiers can be used for different combinations of speakers.
  • Spare equipment can be replaced onsite if something fails in the field.
  • Passive speakers and rackmount power amplifiers tend to be more rugged and durable.
  • Consequently, they are typically larger and heavier.
  • More equipment to transport and hook up. More individual pieces to buy and monitor.

What Size Billboard Should I Consider?

Digital Billboard Size?

In South Africa billboards vary in display position and size, but some industry standard display surface sizes include:

6 ft. x 12 ft. = 72 square feet (6.7sqm) (1.8m x 3.6m)

8 ft. x 12 ft. = 96 square feet (8.9sqm) (2.4m x 3.6m)

10.5 ft. x 36 ft. = 378 square feet (35.11sqm)

10 ft. x 22 ft. = 220 square feet (20.4sqm)

10 ft. x 24 ft. = 240 square feet (22.29sqm)

12 ft. x 25 ft. = 300 square feet (27.87sqm)

12 ft. x 40 ft. = 480 square feet (44.59sqm)

14 ft. x 48 ft. = 672 square feet (62.43sqm)

16 ft. x 60 ft. = 960 square feet (89.18sqm)

20 ft. x 50 ft. = 1,000 square feet (92.90sqm)

Hope this article helps, please coment below if you have any contrabutions that will help our community.

About LED Bulbs

Light-emitting diodes date back to the 1960s. For decades LEDs did not have many practical applications due to their manufacturing cost. Today, LEDs have cost-effective applications in most electronics.


Tri Bulb LED (DIP)

Tri Bulb LEDs are larger in size than SMDs. Tri Bulb LEDs, however, still have many applications for cost-effective lighting. These applications include solar-powered lighting products used in areas with unreliable power supplies. Tri Bulb LEDs are also a better alternative to lighting because they use less energy and have a longer lifespan than, fluorescent light bulbs for example. The reduction of the size of the LED made it possible to place 3 LEDs of different color in one unit. The three colors – red, blue and green – create smaller pitch. The pitch (or distance) between pixels affects the resolution and image quality of an LED display, such as a digital billboard


SMD LEDs mount on the surface of electronic boards but do not physically go through the boards like other types of LEDs. Another important feature of SMD is miniaturization. Using one LED to create three colors results in improved image quality.

If you would like to learn more about LED, LED digital signage or LED displays then signup below and get updated with the latest industry trends and information.

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Advertising space in Cape Town – Wynberg digital billboard 4×2

Passed by +75 thousand cars per day all going into Wynberg. It is 4mx2m and a 5 second add promoting your business could make a good difference. Limited availability, our price per month R500 for a 5 second add showing 244 times per day for 30 days.

  1. no contracts,
  2. inquire below about your desired date/s,
  3. confirm,
  4. send add
  5. then we flight. 

No mess, no fuss. Only advertise when you want, no pressure.


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Getting Married in South Africa

Marriage LAW in South Africa

If you are planning to get married in South Africa then here is some info that you might need to know.

Three types of marriages are recognized under South African law:

  1. civil marriages
  2. customary marriages
  3. civil unions


The solemnization and registration of these marriages are managed by the Department of Home Affairs.

When you enter into a civil marriage or civil union, the marriage officer will issue a handwritten marriage certificate at the ceremony. You can apply for a copy of the marriage certificate from the Department of Home Affairs if you have been married in South Africa and your marriage is registered. The first issue of an abridged marriage certificate is free, but you will have to pay for a second issue or an unabridged certificate. Where one partner has passed away and you need to prove that you had been married, an unabridged marriage certificate will be issued.

The definition of a customary marriage is one that is “negotiated, celebrated or concluded according to any of the systems of indigenous African customary law which exist in South Africa”. You must register your customary marriage within three months of the date of celebration or entering into the marriage to make it legal. This can be done at any office of the Department of Home Affairs or through a designated traditional leader in areas where there are no Home Affairs offices.


If you are looking for an internationally experienced female reverend to marry you in South Africa then we can recommend Rev Elise Theunnesen call her manager Tracey on +27829299755 for booking inquiries.