The Avalon 737 gives everything in your studio a special touch.
It produces epic results with radio-ready gloss and detail for artists like Eric Clapton and The Rolling Stones, Jay-Z and Dr. Dre, Babyface and Beyonce, and Dr. Dre and Jay-Z.
You’ll be astounded by how warm and lovely it sounds when you run even the dullest, most sterile mic through the VT-737sp. Your recordings will be energised.
The Avalon VT-737SP combines
- TUBE preamplifiers,
- an Opto-compressor,
- a sweep equaliser,
- output level, and
- VU metres.
Two cascaded, twin vacuum-tube triodes are used in a class A preamp with the least amount of negative feedback.
Moreover, the high-gain switch, high-pass filter, and hardwire relay bypass are top-notch features of the Avalon Vt 737sp.
The Avalon VT-737sp vacuum tube channel strip has become as the gold standard for emphasising a lead vocal after it was introduced in the 1990s.
The limited-edition black tube voice channel from Avalon VT737 SP. delivers unmatched clarity, warmth, and presence for your mic, instrument, or line mono channel thanks to the tubes.
The VT-737SP has three input selections:
1. The VT-737SP features a higher-performance microphone input transformer with a +48v phantom selection.
2. Instrument DI high source input with jack located on the front panel.
3. Balanced line input, discrete high-level Class A. The Class A preamplifier utilizes two cascaded, dual vacuum tube triodes configured with minimum negative feedback.
A high-gain switch boosts the overall gain of the preamplifier. The four 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 three inputs.
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.
The VT-737sp equalizer utilizes 100% discrete, Class A-high-voltage transistors for optimum sonic performance.
The high- and low-frequency bands provide the smooth characteristics of an all passive design, while the dual mid bands include variable frequency and switched Q-width selection. The enhanced range of the VT-737sp’s mid bands is extended into the high and low bands by the use of X10 frequency multipliers.
The bypass switch incorporates a sealed silver relay for the most direct signal path. When the EQ to sidechain is engaged, the high-low EQ remains in the audio path for “tone enhancement.” The output level control provides a variable control of the overall signal path.
The output amplifier utilizes another dual triode vacuum tube driving a 100% discrete, Class A, high-current, balanced and DC coupled low noise output amplifier.
- Vacuum tube triode signal path,
- transformer balanced microphone input,
- high-voltage circuits for maximum headroom to +30dB,
- low noise -92dB,
- internal discrete power supply with toroidal transformer,
- soft-start tube life extender,
- stereo link for compressors,
- all discrete Class A equalizer with musical passive filter design,
- sealed silver relays for signal routing,
- large control knobs with professional conductive plastic potentiometers,
- Vacuum tube and innovative design
- Perfect for DAW and digital recording
- Wide range of tube tone and control
- Excellent value for performance
- VU meter for output level monitoring and
- compressor gain reduction.
Four dual triode vacuum tubes (Sovtek 6922), high-voltage discrete Class A
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
Microphone: 26dB@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 to 20dB
Noise 20kHz unweighted
Noise microphone EIN
-116dB, 22Hz to 22kHz unweighted
Distortion THD, IMD
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
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
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
Internal toroidal 100v to 240v, 50-60Hz selectable, 75 watts maximum
19 x 12 x 3.5 in (482 x 305 x 89mm)