Equalizer type: Discrete Class A, variable active and switched passive design.Attack - Release: Attack variable 2mS to 200mS, release variable 100mS to 5 seconds.Threshold - Ratio: Threshold variable -30dB to +20dB, ratio-compression variable 1:1 to 20:1.Compressor type: Optical passive attenuator incorporating twin vacuum tubes and stereo link.High cut filter: Variable 6dB per octave 30Hz-140Hz.VU meter and gain reduction: High quality illuminated OVU =+4dB and gain reduction to -20dB.Frequency response -3dB: 1Hz-200kHz line in-out.Frequency response -2.5dB: 10Hz-120kHz input filter included.Noise microphone EIN: -116dB, 22Hz-22kHz unweighted.Output type and gain: XLR connector, output trim gain -45dB to20dB.Maximum output level: +30dB balanced 600 ohms, DC coupled, discrete Class A.Maximum input level and connector types: balanced XLR Instrument+30dB unbalanced front panel jack socket.Line: Balanced Class A 20k ohms, -27dB to 28dB.Gain Range Microphone: Transformer balanced 850/2500 ohm, 0dB to +58dB Instrument: Unbalanced 1 meg ohm, 0dB to +30dB.Circuit topology: 4 dual triode vacuum tubes (Sovtek 6922), high-voltage discrete Class A.The main specifications of the Avalon VT-737 SP include: Balanced mic input, front-panel instrument DI, and balanced line inputs.The main features of the Avalon VT-737 SP include: The Avalon VT-737 SP has a high-gain switch, high-pass filter, and hardwire relay bypass. Class A preamp uses 2 cascaded, dual vacuum-tube triodes configured with minimum negative feedback. Balanced mic, front-panel instrument DI, and balanced line inputs. The Avalon VT-737 SP Mono Mic Pre/Compressor/EQ is a combination tube preamp, opto-compressor and sweep equalizer, with output level and VU metering in 2 rackspaces. Delivers impeccable clarity with tube warmth and presence for your mic, instrument or line mono channel. Path.The Avalon VT737 SP Tube Voice Channel. Level control provides a variable control of the overall signal When the EQ to sidechain is engaged, the high-lowĮQ remains in the audio path for "tone enhancement". The bypass switch incorporates a sealed silver relay for the mostĭirect signal path. Into the high and low bands by the use of X10 frequency multipliers. The enhanced range of the mid bands is extended While the dual mid bands include variable frequency and switched The high and low frequencyīands provide the smooth characteristics of an all passive design, Transistors for optimum sonic performance. The VT-737SP equalizer utilizes 100% discrete, Class A-high-voltage The compressor bypass is a sealed silver relay for the Two VT-737SPs can be linked via a rear panel link cable for stereo Via a front panel switch for alternate effects and tone shaping. The EQ section can be flipped pre or post the opto-compressor Including de-ess is available with the dual sweep mid EQ to side-chain Reduction selection on the large VU meter.
Avalon preamp 737 plus#
Threshold, ratio-compression, attack and release controls plus gain Full dynamic controlįrom soft compression to hard- knee limiting can be achieved with The optical attenuatorĪcts as a simple passive level controller. The opto-compressor features a minimum signal path design with twinĬlass A vacuum tube triodes for gain matching. Passive-variable high pass filter and hard-wire relay bypass completes Tubes are configured as singled ended anode coupled followers. A high gain switchīoosts the overall gain of the preamplifier. Triodes configured with minimum negative feedback. The Class A preamplifier utilizes two cascaded, dual vacuum tube Balanced line input, discrete high-level ClassĪ. Instrument DI high source input with jack located The VT-737SP featuresĪ higher-performance microphone input transformer with +48v phantom The VT-737SP has three input selections: 1. Features a combination of TUBE preamplifiers, opto-compressor, sweepĮqualizer, output level and VU metering in a 2U space.
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