bing
THE UK’S #1 THE BEST PRICE IN EUROPE
01273 665 400 lines open 7 days a week Until 8pm on weekdays! Contact Us
  1. Home
  2. STUDIO OUTBOARD
  3. PRE-AMPS & CHANNEL STRIPS
  4. AVALON DESIGN

Avalon Design VT 737 SP Class A Mic Preamp

#61079
Average rating / 5
5 stars
(0)
4 stars
(0)
3 stars
(0)
2 stars
(0)
1 star
(0)
V12 FINANCE AVAILABLE ONLINE
30 DAY MONEY-BACK GUARANTEE
25 YEARS OF GAK

Product discontinued

Class A Inst/Mic Preamp
The VT-737SP has 3 input selections:

1. The VT-737SP features a higher-performance microphone input transformer with +48v phantom selection.

2. Instrument DI high source input with jack located on front panel.

3. Balanced line input, discrete high-level Class A.

The Class A preamplifier utilizes 2 cascaded, dual vacuum tube triodes configured with minimum negative feedback. A high gain switch boosts the overall gain of the preamplifier. The 4 high quality tubes are configured as singled ended anode coupled followers. A passive-variable high pass filter and hard-wire relay bypass completes the input signal conditioning. The phase reverse relay is available on all 3 inputs.

Opto-Compressor
The opto-compressor features a minimum signal path design with twin Class A vacuum tube triodes for gain matching. The optical attenuator acts as a simple passive level controller. Full dynamic control from soft compression to hard- knee limiting can be achieved with threshold, ratio-compression, attack, and release controls plus gain reduction selection on the large VU meter. Special spectral control including de-ess is available with the dual sweep mid EQ to side-chain switch. The EQ section can be flipped pre or post the opto-compressor via a front panel switch for alternate effects and tone shaping. Two VT-737SPs can be linked via a rear panel link cable for stereo tracking. The compressor bypass is a sealed silver relay for the most direct signal path.

Call GAK now for product info, advice and the Best Prices - 01273 665400

  • Circuit topology
  • 4 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
  • [email protected], 3[email protected] 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
  • 22 lbs (10 kg)
  • Dimensions - Shipping Carton
  • 21 x 18 x 8 in. (533 x 457 x 203mm)
  • Weight - Packed
  • 26 lbs (11.8 kg)

GAK spotlight