AVALON VT737SP

Full description

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