Analog Audio Mixer Console-Air4-12-channel
WHEATSTONE
AUDIOARTS AIR-4
12 CHANNEL ANALOG RADIO MIXER
A Never Lost Audio Art – Analog Mixing

With our Audioarts AIR-4 12-channel radio console, we’ve put together
exactly what needs to be in a compact radio console and made it work the
way it should. The AIR-4 is based upon a simple premise: Low cost does not
have to be synonymous with low quality.
The AIR-4 has four microphone preamps built in. This allows the use of a
host microphone and three guest microphones with the AIR-4 without the use
of any external mic preamps. It gives you 12 input faders (w/A-B source
select), a 13th fader for call-ins, external machine control, two program
busses, built-in cue speaker and CR, headphone and studio monitoring
control. Add patchable USB connectivity for PC news, production work
stations or streaming audio, and the Audioarts AIR-4 is perfect for local
radio stations and internet broadcasters.
The AIR-4 design utilizes top grade components and circuits for superb
performance. With basic features like machine control, cue, talkback, and
mix-minus included, it’s perfect for smaller stations looking to upgrade
as well as for larger facilities in need of an auxiliary studio or
newsroom console.
The Audioarts AIR-4 mixing console draws upon Wheatstone Corporation’s
continuing investment in the latest design, tooling, and manufacturing
infrastructure. Because we both design and manufacture our own audio
consoles, right here in New Bern, NC, USA, we can ensure our reputation
for unparalleled quality, performance, and reliability.
The AIR-4 delivers superb broadcast quality and an excellent feature set
at a great value.
FEATURES
- 12 stereo input fader channels, each with A and B inputs and remote START logic
- 13th phone caller fader with talkback and auto mix-minus to caller
- Four high performance mic preamps with variable gain trims to precisely match your microphones; preamp outputs jumper to any input fader’s A or B input
- Two program busses with balanced outputs (switchable stereo or mono mode)
- External input feeds the monitor section (for live air or pre-delay air monitoring)
- CR room monitor switchable PGM 1, PGM 2 or external; can mute when CR mic is live
- Split cue — when any fader is in CUE, sends cue audio to left channel and L+R sum of selected monitor source to right channel (switchable separately for CR and headphone)On-air light — front panel LED between the meters, and a low current closure output to drive an external ON AIR light relay.
- Studio output with independent source selection and CR-to-studio talkback button
- Plug in faders and conductive plastic monitor pots for easy replacement
- USB connection that is patchable to any of your input faders and internally dipswitchable to pick up program 1 or program 2 output mixes. Lets the AIR-4 interface with your desktop computer for news, music sweetening functions or to stream audio mixes from and to the console.
- Built-in cue speaker can automatically interrupt your main stereo monitors

Input section
Source Select Selects between two analog stereo sources: A and
B
Program Assign Assign the selected source signal to any combination
of the console’s two stereo Program outputs
Cue Button Places the channel’s signal on the console’s cue bus.
ON Button Turns the channel on and off by means of electronic
switching and can simultaneously start external source machines.
Fader Sets the channel’s level.
Caller Input section
Program Assign Output switches assign the caller to any
combination of the console’s two PROGRAM outputs and permit live talk-ins.
CUE Button Allows interviewing the caller prior to airing by
including the caller’s voice in the console’s cue bus, where it may be
heard on the meterbridge mounted cue speaker.
TB Button When the TB switch is pressed (it is momentary action),
Mic 1 will interrupt the regular caller signal, thus allowing the DJ to
talk to the caller prior to airing.
ON Button Determines if the phone channel is ON or OFF.
Fader Sets the caller’s signal level.

Control Room/Monitor Section
CUE Level Control Determines the overall loudness of the cue
signal as it appears in the console’s cue speaker.
EXT Switch Pressing the EXT switch allows the operator to pick up
the external input (useful for such items as tape recorders or air
returns) to listen.
Program Select Pressing either of the two program switches allows
the operator to listen to the selected output bus.
CR (CONTROL ROOM Level Control) Determines the overall loudness of
the signal being monitored as it appears in the Control Room speakers.
METERS Select Buttons Select the source for the switched meter
pair.
HDPN (HEADPHONE Level Control) Determines the overall loudness of
the headphone output signal.
Studio Monitor Section
TB (Talkback) Button Lets the operator’s microphone signal
interrupt the normal feed to the studio speakers, allowing the operator to
talk to the performers in the Studio.
EXT Switch Pressing the EXT switch allows the external balanced
input (such as tape recorders or air returns) to be heard in the studio.
Program Select Pressing either of the two program switches allows
the selected output bus to be heard in the studio.
Studio Level Control Determines the overall loudness of the signal
being monitored as it appears in the Studio speakers.

SPECIFICATIONS
AUDIO INPUT | |
---|---|
Mic | Direct wire plug terminals, balanced |
Electronic differential, >2KΩ bridging | |
Adjustable sensitivity | |
max. input -6dBu | |
Line (Caller, External) | RJ-45 balanced, |
>10KΩ bridging | |
+4dBu = 0VU, max. input +24dBu |
AUDIO OUTPUT | |
---|---|
Program & Caller | RJ-45 connectors, balanced |
Electronic differential, 100Ω source | |
Impedance to drive >600Ω 0VU = +4dBu, max. output +24dBu | |
MonitoCR & Studio Monitor | RJ-45 connectors, unbalanced |
Headphone | Stereo 1/4” TRS connector to directly drive typical broadcast style headphones >200Ω |
Cue | Cue speaker in meterbridge |
DB-25 female connector output to drive external power amp |
PERFORMANCE | |
---|---|
Frequency Response | ±0.1dB 20Hz-20kHz (mic & line) |
Dynamic Range | Line (unity gain) 113dB |
Mic (54dB gain) 100dB | |
Headroom | 24dB above -4dB |
Noise | Mic -128dB EIN |
Line -87dB ref 0VU | |
THD+N | Mic <0.02% @-50dBu in, +4dBu out |
Line <0.003% @+4dBu in, +4dBu out | |
Bus crosstalk | -90dB @1kHz |
Stereo separation | -60DB @1kHz |
Off Isolation | -115dB @1kHz |
LOGIC | |
---|---|
On-Air | DB-25 female connector |
Low current closure to drive external on-air light relay | |
Channel Start Out | DB-25 female connector |
Opto-isolated output closure to remote start external devices |
PHYSICAL | |
---|---|
Dimensions: | 28.4” / 72.1cm wide |
15.4” / 39.1cm deep | |
4.4” / 11.2cm height (rear) | |
1.6” / 4.1cm height (front) | |
Weight: | 17 lbs / 7.7kg |
Shipping Weight: | 25 lbs / 11.3kg |
Power | 100-240VAC / 50-60Hz / 50W |

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UNIQUE SOLUTIONS: TOP PERFORMANCES AND RELIABILITY
- HOT PLUG-IN POWER SUPPLY for Instant replacement of the power supplies, easy maintenance, without off-air. The power supply plug-in modules can be safely removed from the front panel without interrupting the transmission.
- STANDARD MARKET AVAILABLE POWER SUPPLY
- SMP: Superior Modular Philosophy
- MODULARITY with very light amplifier modules (less than 17kg/34lbs each)
- Maximum Redundancy
- Ultra compact size 2U for each amplifier module
- DIRECT INTERNET CONNECTION: all the WIRED Line components have direct connection to internet without the help of any external box or accessories.
- LOWEST LOST OF POWER OF THE MARKET IN CASE OF FAILURE OF ONE MODULE: Due to combination of 2kW amplifier modules, extremely low output power loss in case of failure.
- TOTALLY MADE IN ALLUINUM: for minimum weight and robustness.
- AIR PROTECTION: all the internal components are designed to avoid the direct contact with the air, mainly the air coming in from the fans, this avoid all the failures produced by the air corrosion.
- MIRROR Network Mirror System:
- DIREC ACCESS TO MAIN COMMANDS
- OVERALL STATUS SHOWING BY LED
- TOUCH SCREEN BRAIN CONTROL UNIT: The control unit have the specific function to supervise the transmitter, even in case of failure of it (or turned off) manual control of the transmitter guarantee perfect operation.
- Web control
- Extremely detailed web control with all main parameters fully controllable and adjustable, available.
- Weekly scheduler output power for energy consumption optimization management.
- E-mails configuration available sent for any event.
- Remotely upgradable
- SMART BROWSING
- 65:1 VSWR TOLERANCE