True to the Music
Radial Engineering Ltd.
Workhorse User Guide
15
SPECIFICATIONS
Circuit type: Virtual earth mix buss integrated
operational amplifi er - Class AB
Max output level: +22dB (20Hz to 20kHz)
Voltage Gain: Up to +23dB on the main output
Distortion: 0.007% @ 1kHz with 10dB in and 10dB
out
0.05% @ 20Hz with 10dB in and 10dB out
Signal to Noise: -91dB with +20dB output
Card Slot Inputs: 8 x balanced XLR, ¼” TRS, D-SUB
Card Slot Outputs: 8 x balanced XLR, ¼” TRS, D-SUB
Card Slot Impedance: Depends on modules used
Internal Mix Buss: 4.75k Ohms input coupling resister
Summing Mixer Input: DB-25, Unbalanced +4dB/-10dB
with up to +20dB capacity;
input impedance = 4.75K Ohms
Main Output: +4dB balanced stereo XLR and ¼” TRS
outputs; Jensen™ transformer isolated
Main Inserts: ¼” TRS - tip = send; ring = return
Monitor Output: +4dB balanced stereo XLR and ¼” TRS
outputs; transformerless; +4dB balanced
Headphone Out: ¼” TRS Stereo - 2.8VRMS @ 8 Ohms
(up to 7VRMS depending on headphone
impedance)
Ground: Red: audio, Black: chassis
Power Supply Input: 100V - 240V AC (50~60Hz)
Power Supply Output: 1600mA - External switching type with
5-pin XLR, +/-16 VDC; 48V phantom
Dimensions: 19” wide x 5.25” tall x 7.44” deep
482.6 wide x 134 tall x 189mm deep
Weight: 22lbs / 10kg
MONO / STEREO SW
D-SUB INPUTS D-SUB OUTPUTS SUMMING MIXER INPUTS
INPUT OUTPUT INPUT OUTPUT
OTHER
INPUTS
4K75
4K75
CHANNEL 8
FEED SW
LINK SW
CARD SLOT 1
OMNIPORT
EXPANSION BUSS
STEREO INPUTS
MIXER CH. 2
LEVEL
MIXER CH. 1
LEVEL
OVERLOAD
LED
MIXER CH. 2
ON/OFF
MIXER CH. 1
ON/OFF
PAN
EXPANSION BUSS
STEREO OUTPUTS
MAINS INSERT
MAINS INSERT
FEED TO
NEXT CHANNEL
INSERT: TIP=SEND / RING=RETURN
MASTER BUSS
PIN 11
MIX BUSS
PIN 11
MIX BUSS
PIN 9
PIN 7
PIN 9
PIN 7
HEADPHONE
OUTPUT
MAIN OUTPUT
RIGHT
MAIN OUTPUT
LEFT
MONITOR OUTPUT
RIGHT
MONITOR OUTPUT
LEFT
MONITOR
LEVEL
MONITOR
ON/OFF
MASTER
LEVEL
MASTER
ON/OFF
OMNIPORT
CARD SLOT 2
PAN
OVERLOAD
LED
HEADPHONE
LEVEL
TRANSFORMER
ISOLATION
TRANSFORMER
ISOLATION
WORKHORSE BLOCK DIAGRAM
