Description
The Avalon VT-737SP features a combination of TUBE preamplifiers, opto-compressor, sweep equalizer, output level and VU metering in a 2U space.
- Circuit topology
Four dual triode vacuum tubes (Sovtek 6922), high-voltage discrete Class A - Gain Range
Microphone: Transformer balanced 850/2500 ohm, 0dB to +58dB
Instrument: Unbalanced 1 meg ohm, 0dB to+30dB Line: Balanced Class A 20k ohms, -27dB to 28dB - Maximum input level and connector types
Microphone26dB@25Hz, +30dB@1kHz balanced XLR Instrument+30dB unbalanced front panel jack socket
Line +36dB balanced XLR - Maximum output level
+30dB balanced 600 ohms, DC coupled, discrete Class A - Output type and gain
XLR connector, output trim gain -45dB to20dB - Noise 20kHz unweighted
-92dB - Noise microphone EIN
-116dB, 22Hz to 22kHz unweighted - Distortion THD, IMD
0.5% - Frequency response -/2.5dB
10Hz to 120kHz input filter included - Frequency response -3dB
1Hz to 200kHz line in-out - VU meter and gain reduction
High quality illuminated OVU =+4dB and gain reduction to -20dB - High cut filter
Variable 6dB per octave 30Hz to 140Hz - Compressor type
Optical passive attenuator incorporating twin vacuum tubes and stereo link - Threshold – Ratio
Threshold variable -30dB to +20dB, ratio-compression variable 1:1 to 20:1 - Attack – Release
Attack variable 2mS to 200mS, release variable 100mS to 5 seconds - Equalizer type
Discrete Class A, variable active and switched passive design - Frequency bands (4)
Treble – switched 10kHz, 15kHz, 20kHz, 32kHz, +/- 20dB range, shelf High mid – variable 200Hz to 2k8Hz and 2kHz to 28kHz, +/- 16dB range, hi-lo Q Low mid – variable 30Hz to 450Hz and 300Hz to 4k5Hz, +/- 16dB range, hi-lo Q Bass – switched 15Hz, 30Hz, 60Hz, 150Hz, +/- 24dB range, shelf - AC power
Internal toroidal 100v to 240v, 50-60Hz selectable, 75 watts maximum - Dimensions
19 x 12 x 3.5 in (482 x 305 x 89mm) - Weight
22lbs (10kg) - Dimensions-shipping carton
21 x 18 x 8 in (533 x 457 x 203mm) - Weight-packed
26lbs (11.8kg)
