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Studio & Recording > Preamps > Channel Strips > Avalon VT-737sp

Avalon VT-737sp

Item ID: VT737SP

Tube Microphone / Instrument Preamplifier, Opto-compressor, and Sweep Equalizer

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From Our Research Team:

The Ultimate In Mic Pre Performance and Control!

The VT-737sp brings its magic touch to everything in your studio. Run your dullest, most sterile mic through the VT-737sp and you’ll be amazed at how warm and sweet it sounds. This 2-rackspace combo brings a new standard to high-end audio, taking your sound to places you never thought possible and giving you precise creative control. The VT-737 will energize your recordings!

Avalon VT-737sp Channel Strip at a Glance:
  • Class A preamp design with three input selections
  • Opto-compressor with minimum signal path
  • Sweepable EQ and hardwired bypass

Class A preamp design with three input selections
The VT-737sp has three input selections: First, it features a higher-performance microphone input transformer with 48-volt phantom selection. Second, the VT-737sp offers an instrument DI high-source input with a jack located on front panel. Finally, the VT-737sp includes a balanced line input with discrete high-level Class A circuitry. 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 hardwired relay bypass completes the VT-737sp's input signal conditioning. A phase reverse relay is available on all three inputs.

Opto-compressor with minimum signal path
The VT-737sp's 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 VT-737sp's 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.

Sweepable EQ and hardwired bypass
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.


Avalon VT-737sp Channel Strip Features:
  • Vacuum tube and discrete design
  • Ideal for DAW and digital recording
  • Wide range of tube tone and control
  • Excellent value for performance
  • Rugged Avalon construction

The Avalon VT-737 - Let your mics perform better than they ever have before!

VT-737sp Image Gallery

Specification Detail
Preamp Type Tube
Number of Channels 1
Frequency Response 10Hz-120kHz
Phantom Power Yes
EQ Yes
Compressor Yes
Other Processing No Other Processing
Analog Inputs 1 x XLR (Mic), 1 x XLR (Line), 1 x 1/4" (Hi-Z)
Analog Outputs 1 x XLR
Digital Inputs No Digital Inputs
Digital Outputs No Digital Outputs
Other I/O No Other I/O
Computer Connectivity No Computer Connectivity
Rackmount Spaces 2U
Height 3.5"
Depth 12"
Width 19"
Weight 22 lbs.
Manufacturer Part Number VT-737SP

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Reviews

based on 22 reviews

Just The Best

by GaryMusic from Dearborn MI
May 25, 2010
Music Background: Musician, Songwriter
I can't say enough good things about the Avalon. I purchased two. The first many years ago and loved it so much as it just made anything I passed through it. Best DI for Bass I have ever heard. S... read more [+]o smooth and full. Great vocal mic pre. The EQ section is great. I use the the two Avalons at mix down as external plugins in Cubase 5. Really works on everything very well. close [-]

My baby

by Edison Munoz from Medellin
March 17, 2009
Music Background: Music Producer
With any intrument or vocal it soung with any other!!!

A WORLD STANDARD

by Bigtyme 175 from New Jersey
December 23, 2008
Music Background: Hobbyist, Student
This thing is like hot chocolate on a cold winter night it just warms everything that passes thru it,if you are considering purchasing this unit then look no further your LORD & SAVIOR IS HERE !.

Holy balogney

by Mats from Norway
November 24, 2008
Music Background: Hobbyist, engineer
The government should make it mandatory for every citizen to have this device strapped around their neck, 24/7, 365 days a year, to speak through. Dont talk to me unless its through a 737.

After using this, there is NO OTHER Channel Strip!!!

by AKB from New York, NY USA
October 31, 2008
Music Background: Recording Engineer/Producer
I use the 737sp in my setup a lot, mainly as a front-end when I'm recording into Logic with a Rosetta interface. Paired with a Neumann U-87, this thing is unbeatable. I love to use it on my R&B songs... read more [+], as it adds an intimacy and warmth like no other. The best of the best! close [-]
Read more reviews
See Also: Avalon , Avalon Channel Strips

Avalon VT-737sp

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Our Customers Say...

My Sales Engineer is the best. If I need it tomorrow, I have it tomorrow. He makes sure everything is in order and that I'm set up right. I've spent a lot of money at other places, too, but I don't remember them calling me to make sure everything's okay.
Nick Moon, Portland, OR

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