AADA-VF analogue audio distribution amplifier

Vision frame systemDual channel symbolRemote control symbol

What is it?

AADA-VF analogue audio distribution amplifierDual channel analogue audio distribution amplifier.

Reason to choose it...

You can configure it to be what you need - either a stereo or mono amplifier - and you'll fit up to 40 audio channels in 3U. With highly robust inputs and outputs and remote control included as standard, the useful features include audio silence detection, overvoltage detection and the most extensive gain adjustment we've ever offered.

Ideal for...

The flexible distribution of analogue audio in any broadcast environment. See who's using our AADAs.

Control it...

Try out the AADA-VF VisionWeb GUI (opens in new window) – you'll see how easy it is to operate the AADA-VF from your web browser, while exploring the full functionality of the product.

Got a question?

We would be very happy to answer any questions you've got about the AADA-VF. Either send us an e-mail or get an immediate response by speaking to us now on our Live Chat...

  • Main features
  • Details
  • Specs
  • What outputs do I get?
  • What do I order?
  • Who's using it?

Main features

  • Dual channel analogue audio distribution amplifier
  • Configure as stereo amplifier with four outputs of each channel, or as mono amplifier with eight outputs of channel 1
  • Robust fully floating inputs and outputs
  • Extensive audio gain adjustment from -30dB to +30dB in 0.5dB increments
  • Audio silence detector for each channel
  • Overvoltage detector for each channel
  • Inputs and outputs accessed by using an appropriate rear module (VR21)
  • Housed in Vision rack frames
  • Space-saving: 96mm x 325mm card allows up to 20 AADA-VF in 3U
  • Flexible control and monitoring: frame integrated control panel, VisionPanel remote control panel, SNMP, ASCII and JSON protocols or the web browser-based VisionWeb Control
  • Five year warranty (with product registration)
  • This product is available to either purchase or hire, with hire pricing typically 6% of list price per week (with one week minimum hire period and £200 minimum charge)


Distribute analogue audio anywhere

The AADA-VF analogue audio distribution amplifier allows the flexible distribution of analogue audio in any broadcast environment.

The AADA-VF has the essential low noise and distortion which allows the audio to pass through more stages of processing without a loss in quality. It features two separate audio distribution amplifiers, each with an electronically balanced input and four floating outputs which are very robust – should one side be connected to ground, the other will double in amplitude to maintain the difference between the balanced signals, giving a correct single-ended system.

Each output also has an individual line driver which gives excellent isolation between them, meaning a damaged signal injected on to one of the outputs will not affect any of the others.

Configure your inputs and outputs

The AADA-VF can either be configured as a stereo amplifier with four outputs of channel 1 and four outputs of channel 2, or as a mono amplifier with eight outputs of channel 1.

The AADA-VF is used with just one frame rear module, the single slot VR21.

Adjust the gain

The AADA-VF features the most extensive gain adjustment Crystal Vision has ever offered, meaning it can handle a wide variety of input signals and allowing you to easily match the audio to your standard setting.

With fine adjustments in 0.5dB increments, the gain controls will give +/- 30dB of gain relative to the input level, although care must be taken not to exceed the maximum output level of +24dBu. Each channel can be adjusted independently.

Monitor your audio

A number of useful monitoring tools ensure you remain aware of exactly what's happening to your audio at all times.

Useful for alerting you that your audio signal has failed or that there is no input, each channel has an individual audio silence detector – with adjustable threshold level and duration to prevent false alarming during quiet audio periods. The audio silence level setting can be selected from -30dBu to -42dBu in 1dBu steps. If the audio signal level falls below the selected level for a chosen period of time from two to 120 seconds, then it is considered 'silent'. Both audio channels share the same silence time and threshold settings.

There is also an overvoltage detector for each channel, with the overvoltage threshold level shared by both channels and adjustable between +12dBu and +24dBu in 1dBu steps.

Both these monitoring tools can be used with SNMP to trigger alarms.

Remote control

All control is done remotely. The control and monitoring options for the AADA-VF include an integrated control panel on the Vision frame, the VisionPanel remote control panel, our ASCII and JSON protocols, SNMP and the VisionWeb web browser control. Try the AADA-VF VisionWeb demo...

There is remote control of dual channel/single channel mode, audio gain, the silence indication time delay and threshold and the overvoltage threshold, and remote monitoring of audio silence and overvoltage for each channel.

Crystal Vision frameSave rack space

Fitting in the standard Vision frames (currently available in 3U size), the AADA-VF is a space-saving 96mm x 325mm card that sits in one frame slot - allowing up to 20 DAs in 3U.




Standard Vision card 96mm x 303mm (96mm x 325mm including finger pull)

Weight: 160g

Power consumption: 5 Watts


Two analogue audio inputs, electronically balanced

High impedance input (>20 kohm)

Maximum level: +24dBu (>+24dBu inputs clipped to output +24dBu)


Eight analogue audio outputs, electronically balanced, using VR21 frame rear module

Can be configured as a stereo amplifier with four outputs of channel 1 and four outputs of channel 2, or as a mono amplifier with eight outputs of channel 1

Low impedance outputs: 50 ohm

Maximum level: +24dBu


Signal to noise ratio: 108dB, 0dB gain, 0dBFS = +24dBu (20Hz to 20kHz)

Frequency response: +/-0.05dB (20Hz to 20kHz)

Total Harmonic Distortion (THD): <0.003% 20Hz to 20kHz, +24dBu

Common mode rejection: >80dB (20Hz to 20kHz)

Interchannel crosstalk: <-100dB, 10kHz


Adjustment: -30dB to +30dB in 0.5dB steps (factory default set to 0dB)

Each channel can be adjusted independently


Set period of silence before indication from two to 120 seconds in one second increments

Set silence threshold between -30dBu and -42dBu in 1dBu steps (factory default set to -30dBu)

Both channels share the same silence time and threshold settings


Set overvoltage threshold between +12dBu and +24dBu in 1dBu steps (factory default set to +24dBu)

Both channels share the same overvoltage settings


Power okay


Remote control of dual channel/single channel mode selection, audio gain, silence indication time delay and threshold and overvoltage threshold

Remote monitoring of audio silence and overvoltage for channel 1 and audio silence and overvoltage for channel 2. No input also constitutes silence


VisionWeb Control is available via the web server on the frame and allows control and monitoring using a standard web browser on a computer, tablet or phone

SNMP monitoring and control available as standard

Control using ASCII and JSON protocols


Control from integrated control panel on Vision 3 frame

Control from VisionPanel 3U remote panel


NB. No board edge control available on Vision products


What outputs do I get?

Signal inputs and outputs are accessed by using an appropriate rear module.

The Vision rear modules slot on at the back of the frame and typically feature BNC, Micro BNC, D-Type and LC fibre connectors.

There is one rear module available for the AADA-VF...

VR21 rear module label and connections

More about the VR21

Connectors: 25-way standard density D-Type and 15-way standard density D-Type

Frame slots used: 1

Boards in 3U: 20

Why use it: It's the only rear module for AADA-VF

Also used for: DADA-VF


AADA-VF inputs and outputs with VR21 rear module

VR21 rear module label for AADA-VF


For more visual technical information, download the AADA-VF block diagram.

What do I order?

Request a quote...

Read the ordering info below then fill in this form to request a quote for the AADA-VF analogue audio DA and accessories...

Your contact details
Items for quote

First you need the 96mm x 325mm card...

Dual channel analogue audio distribution amplifier

Next select your frame...

Vision 3
3U frame with integrated control panel and smart CPU for up to 20 Crystal Vision cards from the Vision range. Includes two PSU3-VF power supplies for redundancy. Allows Ethernet connection to a PC

You need a rear module to access your inputs and outputs...

Single slot frame rear module. Allows 20 AADA-VF in 3U. Gives access to two analogue audio inputs with four analogue audio outputs of each channel (or eight outputs of one input)

Finally - control. Complimentary options include the frame's integrated control panel, the VisionWeb web browser control, SNMP and our ASCII and JSON protocols. Alternatively order the item below...

3U Ethernet remote control panel with touch screen


Who's using it?

Users of the AADA analogue audio distribution amplifiers in the Indigo and Vision ranges include...

  • 4KXL (UK)
  • Addis Ababa Mass Media (Ethiopia)
  • Advanced Broadcast Services (UK)
  • Advanced System Integrated Co., Ltd. (Taiwan)
  • Advent Communications (UK)
  • Al Jazeera (Qatar)
  • Alter Ego Media S.A. (Greece)
  • Antenna Hungária (Hungary)
  • Antenna TV (Greece)
  • ANTV (Vietnam)
  • Arabsat (Saudi Arabia)
  • Arqiva (UK)
  • Astro (Poland)
  • AVC (UK)
  • Bắc Ninh TV (Vietnam)
  • Bath Spa University (UK)
  • BBC (UK)
  • BBC Millbank (UK)
  • BBC Northern Ireland (UK)
  • BBC Scotland (UK)
  • BBC Studioworks (UK)
  • BBC Wales (UK)
  • BBC World Service (UK)
  • BFE Studio (Austria)
  • Binh Phuoc TV (Vietnam)
  • Channel 4 (UK)
  • Channel 9 (Greece)
  • Channel 10 (Greece)
  • Channels TV (Nigeria)
  • Chatham House – The Royal Institute of International Affairs (UK)
  • Chicopee Telecom (USA)
  • Chiyoda-Video (Japan)
  • Chukyo TV Broadcasting (Japan)
  • City of Glasgow College (UK)
  • City University London (UK)
  • Comux (UK)
  • Coronation Street/ITV Studios (UK)
  • Cotswold Communications (UK)
  • Covetel (Venezuela)
  • Crete TV (Greece)
  • Custom Consoles (UK)
  • CVP (UK)
  • Czech TV (Czech Republic)
  • dB Broadcast (UK)
  • Dega Broadcast Systems (UK)
  • DigitalWide srl (Italy)
  • Doordarshan Kendra (India)
  • E to E (UK)
  • Eddystone Broadcast (UK)
  • EDI Effetti Digitali Italiani Srl (Italy)
  • Emmerdale/ITV Studios (UK)
  • EMMRC - Educational Multimedia Research Centre (India)
  • EMS (UK)
  • Encore Broadcast Solutions (USA)
  • ERT (Greece)
  • ESPN Star Sports/Fox Sports (Singapore)
  • ETI-Electronic Technology Inc. (USA)
  • Euronews (Albania)
  • Eurosport (Greece)
  • FAL Systems (UK)
  • FB TV (Turkey)
  • Foss Productions (Greece)
  • Fountain Studios (UK)
  • Gee Broadcast Systems (UK)
  • Gems TV (India)
  • Gibraltar Broadcasting Corporation (Gibraltar)
  • Giga-Com (UK)
  • GigaSat (UK)
  • Global (UK)
  • GMTV (UK)
  • Habertürk TV (Turkey)
  • Hai Duong Radio and Television Station (Vietnam)
  • Hangzhou Justtong Network Technology inc.,Ltd. (China)
  • Hangzhou TV (China)
  • Hayfisher Productions (UK)
  • HB Communications (USA)
  • HD Vietnam (Vietnam)
  • Hollyoaks/Lime Pictures (UK)
  • Houses of Parliament (UK)
  • HTV - Ho Chi Minh City Television (Vietnam)
  • Ideal Shopping Direct (UK)
  • INA TV (Greece)
  • Indira Ghandi National Open University (India)
  • International Criminal Court (Netherlands)
  • ITV (UK)
  • ITV Studios (UK)
  • Jewellery Maker (UK)
  • JKS Inc. (USA)
  • Kapa Studios (Greece)
  • King Khalid University Medical City (Saudi Arabia)
  • Kingsway International Christian Centre (UK)
  • Kontra (Greece)
  • KT - Korean Telecom Media (South Korea)
  • Links Broadcast (UK)
  • Manchester Studios (UK)
  • Media Broadcast Technology (Vietnam)
  • Mediaspec (UK)
  • Medialogy Engineers Ltd. (UK)
  • Megahertz Broadcast Systems (UK)
  • MEGA TV (Cyprus)
  • MEGA TV (Greece)
  • Molinare (UK)
  • MTV (Greece)
  • National Assembly for Wales (UK)
  • National Performing Arts Center (Taiwan)
  • News24 (Albania)
  • Nova TV (Bulgaria)
  • OneSource Distributors LLC (USA)
  • Open TV (Greece)
  • ORF (Austria)
  • Oxford Sound & Media (UK)
  • Pinellas County Schools (USA)
  • PLD Production (Greece)
  • Prodigy Enterprises Inc. (China)
  • Puls 4 (Austria)
  • Radio Televisyen Malaysia (Malaysia)
  • Reality TV Channel (Greece)
  • Royal College of Music (UK)
  • Royal Opera House (UK)
  • RTC Télé Liège (Belgium)
  • RTÉ (Ireland)
  • RTVS (Slovakia)
  • Russia Today – London Bureau (UK)
  • Sat-Comm (UK)
  • Scottish Parliament (UK)
  • SEC - Supreme Education Council (Qatar)
  • Show TV (Turkey)
  • Siemens (UK)
  • Smart TV (UK)
  • Soc Trang TV (Vietnam)
  • Studios A/S (Denmark)
  • STV (Spain)
  • STV (UK)
  • Supersonic TV (Albania)
  • Supersport (South Africa)
  • SZTV - Szombathelyi Televízió (Hungary)
  • TBS (Taiwan)
  • TCS Telecom e Serv. Srl (Italy)
  • Tele Bruxelles (Belgium)
  • Telecentras (Lithuania)
  • Telemedia (South Africa)
  • Télésambre (Belgium)
  • TeleStudio Modena (Italy)
  • Teletech (Japan)
  • Teltechco (Vietnam)
  • Televideo (UK)
  • Telewave (Greece)
  • Thameside (UK)
  • The ADI Group (UK)
  • The Federation of Small Businesses (UK)
  • The Jewellery Channel (UK)
  • The Military Broadcasting Centre (Vietnam)
  • The One Show (UK)
  • TJC (UK)
  • Toshiba (UK)
  • TP Emitel (Poland)
  • TRT (Turkey)
  • Türkmeneli Televizyonu (Turkey)
  • TV AlHijrah (Malaysia)
  • TV Globo (Brazil)
  • TV 2 (Denmark)
  • TV 360 (Turkey)
  • TVP (Poland)
  • TV Skyline (Germany)
  • TVT – Television Versioning & Translation Ltd. (UK)
  • UBE Service (UK)
  • United Broadcast & Media Solutions LLC (UAE)
  • Universal Media Services (USA)
  • University of Central Florida (USA)
  • University of Essex (UK)
  • University of York (UK)
  • Videocation (Germany)
  • Viettel TV (Vietnam)
  • Vinh Long Radio and Television (Vietnam)
  • Vinh Phúc TV (Vietnam)
  • Vislink Broadcast (UK)
  • VSC Design (UK)
  • VTC (Vietnam)
  • VTV5 (Vietnam)
  • Westminster Live (UK)
  • William Hill (UK)
  • WTS Broadcast (UK)
  • Wyre Broadcast Solutions (UK)

Do more...


Explore more...

Audio distribution

From the Vision frame system...

  • DADA-VF digital audio distribution amplifier
  • 3GDA-VF MADI audio distribution amplifier with 12 outputs

From the Indigo frame system...

  • AADA416FM analogue audio distribution amplifier with manual control
  • AADA416FR analogue audio distribution amplifier with remote control
  • AADA-STM-1 stereo to mono distribution amplifier
  • DADA208 reclocking digital audio distribution amplifier
  • DADA208N non-reclocking digital audio distribution amplifier
  • DADA208D digital audio delay and distribution amplifier
  • MADDA105 MADI audio distribution amplifier with five outputs
  • MADDA111 MADI audio distribution amplifier with eleven outputs

Not sure which audio DA is best for your application? Have a look at our Indigo and Vision audio distribution amplifiers comparison chart to help you make a decision...