Awesome Channel Amplifier

Tech Specs

Check out some brief technical specification. If we had any class, we’d have letterpressed these with “From the bench of Jens Jungkurth” gold foil embossed, but we’re fresh out of class, so here you have it, down and dirty:


Left “Preamp” Board Connector (A)

01A CHASSIS
02A +OUT
03A +OUT
04A -OUT
05A COMMON
06A -OUT
07A EXT FADER RETURN
08A -IN
09A EXT FADER SEND
10A +IN
11A N/A
12A +16VDC
13A 0V
14A −16VDC
15A +48VDC


Right “EQ” Board Connector (B)

01B CHASSIS
02B MIX BUSS LEFT
03B MIX BUSS LEFT
04B MIX BUSS RIGHT
05B SHIELD GROUND (POWER COMMON)
06B MIX BUSS RIGHT
07B MIX BUSS RIGHT
08B MIX BUSS RIGHT
09B MIX BUSS LEFT
10B MIX BUSS LEFT
11B N/A
12B +16VDC
13B 0V
14B N/A
15B N/A


IMPEDANCE (Nominal 1kHz)

I/P LINE = 12k Ω
I/P MIC = 900 Ω
I/P INSTRUMENT = 200k Ω
O/P = 80 Ω
BUSS = 7.5k Ω

Mic Input: Transformer balanced
Line Input: Transformer balanced
1/4″ Input: Unbalanced
Line Output: Transformer balanced
Buss Output: Transformer isolated, unbalanced

Mic Input Mode*

Nominally 900 Ω transformer balanced, floating
Gain adjustable from +21 to +65 in 7 steps
Maximum input 0 dBu for %1 THD+N @ 1kHz

Line Input Mode*

Nominally 12,000 Ω transformer balanced, floating
Gain adjustable from -6 to +15 in 5 steps
Maximum input +27dBu to produce max output condition (below)

*Mic and Line input modes can be used interchangeably for loud mics and quiet lines, or to experiment with distortion and impedance effects. 48V phantom power can be engaged regardless of the mic/line or gain settings.

Instrument Input Mode

Nominally 200,000 Ω unbalanced
Gain adjustable from -12 to +59 dBu in 12 steps
Maximum input +16 dBu for %1 THD+N @ 1kHz

Line Output

Nominally 80 Ω transformer balanced, floating
Output level continuously adjustable from 0 dBu (FULL ON) to -infinity
Maximum output is +20 dBu into 600 Ω for %1 THD+N @ 1kHz

L-R Buss Outputs

Nominally 6,600 Ω unbalanced, transformer isolated
Maximum output depends on buss termination and summing amp headroom
Unit crosstalk TBD
Channel separation TBD

Noise (w/EQ bypassed)

WTD 10Hz to IEC-A
Not more than -94dBu @ minimum gain
Not more than -57dBu @ maximum gain
Equivalent Input Noise -122 dBu

Distortion (w/EQ centered)

THD+N at +18dBm
0.025% @ 10kHz
0.02% @ 1kHz
0.15% @ 100Hz

Frequency Response

@ 0 dBm, unity gain
± 0.5 dBu 20 Hz to 20kHz (w/EQ bypassed)
± 1 dBu 20 Hz to 20kHz (w/EQ centered)
-1 dB @ 10Hz
+3 dB @ 100kHz

Equalization

Actual Q and boost/cut amounts vary per frequency selected
HF tone control (quasi-shelving)
± 10 dBu @ 6k, 11k, and 17kHz
Q = 1.6 nominal (from 1.3 to 2)
MF presence control (peaking)
± 17 or 12 dBu @ 330, 470, 590, 790, 1.2k, 1.4k, 2.5k, 3k, 5.6k, and 7.8kHz
Q = 1.15 nominal (from 0.3 to 3)
LF tone control (quasi-shelving)
± 12 dBu @ 35, 70, and 130Hz
Q = 0.33 nominal (from 0.2 to 0.5)

High-Pass Filter

12dB/octave @ 130Hz
highly damped

Output Termination

Selectable:
1200Ω (up)
OFF (center)
600Ω (down)

The AwTAC Channel Amplifier is an analog audio signal processor conforming to the industry standard API™ 500 Series modular form-factor. It was designed according to API™ VPR Alliance specifications, and will thus install in any API™ or compatible 500 Series enclosure having two or more conjoined module slots. Such an enclosure, typically called “lunchbox” or “rack”, is required to operate an Awesome EQ, providing the necessary DC power and rear panel input/output connectors. While we at AwTAC™ have found the Purple Audio Sweet Ten Rack, a heavy-duty 10-slot 3RU enclosure which houses up to five  Channel Amplifiers to be our favorite sounding rack, to the best of our knowledge at the time of writing the following third-party 500 Series enclosures should also suffice.

  • Purple Audio Sweet Ten 10-slot rack with built-in power supply (5 AwEQ)
  • API 500-6B 6-slot lunchbox® with built-in power supply (holds 3 AwEQ)
  • API 500VPR 10-slot rack with API L200PS external power supply (5 AwEQ)
  • Atlas Pro Audio Revolver 2-slot rack with built-in power supply (1 AwEQ)
  • BAE Audio 11-slot rack with external power supply (5 AwEQ)
  • BAE Audio 6-slot rack with external power supply (3 AwEQ)
  • BAE Audio 6-slot lunchbox with external power supply (3 AwEQ)
  • BAE DLB Dual-Channel Desktop 500 Series Lunchbox
  • Radial Engineering Workhorse 8-slot rack with external power supply (4 AwEQ)
  • Radial Engineering Workhorse Cube
  • SPL RackPack 500 4-slot rack with external power supply (2 AwEQ)
  • Tonelux V4 Roadster 4-slot lunchbox with built-in power supply (2 AwEQ)

Dimensions: 5.25″ x 3″ x 6″ (h x w x d, inches)
Weight: 2 lbs
Power Requirements: ±86mA @ ±16VDC
+ 4mA @ +48VDC (Only if using phantom-powered microphones)

API ™ is a trademark of Automated Processes, Inc.
AwTAC ™ is a trademark of Glide On Fade, Inc.
lunchbox® is a registered trademark of Automated Processes, Inc.
Tonelux ™ is a registered trademark of AMH Sales, Inc.
Workhorse™ is a trademark of Radial Engineering Ltd.