5 6
Input impedance 600 ohms, bridges-T control (floating)
frequency response ± 1 dB 20 Hz to 20kHz
input transformer balanced +4db XLR
and TRS, wired in parallel
output transformer balanced +4db XLR
and TRS, wired in parallel
input pad -23dB attenuation to audio input source
maximum makeup gain 55db
THD Less than 0.4% total harmonic distortion
from 50 Hz to 20 kHz with limiting
Signal to noise ratio greater than 74 dB at +25 dBm, EIN -104.1 dBm
attack time 20 microseconds to 800 microseconds
release time 50 milliseconds to 1 second
meter modes dB gain reduction, dB output (+4 above
meter), dB output (+8 above meter)
PSU Internal power supply, external 24v
AC .4 amp mains transformer
chasis 19” Rackmount chassis, 2u
BACK PANEL
7. Meter Adjust
The WA76 meter can be adjusted via the rear meter adjust control. This requires a jeweler’s
screwdriver to operate. To calibrate the VU, connect power to the WA76, set all four
knobs to 12 o’clock, pad button not engaged, and no audio cables connected in or out.
Set ratio select to ‘4’, and meter select to ‘GR’. Adjust meter trim pot until needle rests at
exactly ‘0’. The meter is now calibrated. It is not unusual to need to recalibrate the VU
after considerable time has passed, or after the unit has been physically moved around or
transported. Do not attempt to calibrate the VU meter from the front panel VU assembly.
8. Input Pad
This switch sits on the backside of the unit near the inputs. When engaged, it lowers the
incoming signal by -23db. In most normal operations, the pad should not be necessary. This
feature is handy when using a high gain preamp before the WA76 that does not have output
attenuation, or with a source with an extremely loud transient, such as snare drum. When
sending a loud line level signal into the WA76 input, this feature will provide greater flexibility
to the WA76 input control, allowing you to turn it up higher before compression begins.
9. Inputs
2 inputs are provided on the backside of the WA76 for flexibility. One is a balanced TRS
connection, the other is a balanced XLR. You can connect many line-level sources directly to the
WA76. Preamps such as the Warm Audio WA12 and TB12 are great sources to feed directly
into the WA76 input. These inputs can be used simultaneously but note that having both
connected at the same time could create unwanted noise if one source is not actively carrying a
signal to the WA76. For unbalanced operation, use an unbalanced TS (tip/sleeve) ¼ cable.
10. Outputs
2 outputs are provided on the backside of the WA76 for flexibility. One is a
balanced TRS connection and the other is a balanced XLR. For unbalanced operation,
use an unbalanced TS (tip/sleeve) ¼ cable.
11. AC Power
The WA76 is designed to use a 24V AC, .4 amp power transformer. Warm Audio recommends
that you use the transformer we provide, included with the unit.
CHAPTER 3: TECHNICAL SPECS CHAPTER 3: TECHNICAL SPECS
7
8
10
9
11
To Next Page
Loading...
