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Item # 186101 | Customer Ratings: Ratings ( 5 Based on 6 reviews)

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Avalon VT-737sp Class A Mono Tube Channel Strip
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      Avalon VT-737sp Class A Mono Tube Channel Strip (186101)
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      Avalon VT-737sp Class A Mono Tube Channel Strip (186101)
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Impeccable clarity with tube warmth, presence, full-range versatility.

The Avalon VT-737sp Class A Mono Tube Channel Strip is a combination tube preamp, opto-compressor and sweep equalizer, with output level and VU metering in 2 rackspaces. Balanced mic, front-panel instrument DI, and balanced line inputs. Class A preamp uses 2 cascaded, dual vacuum-tube triodes configured with minimum negative feedback. The Avalon Vt 737sp has a high-gain switch, high-pass filter, and hardwire relay bypass.

Avalon VT-737sp Class A Mono Tube Channel Strip Features:

  • Tube preamp
    Opto-compressor
    Sweep equalizer
    Output level control
    VU metering
    Balanced mic input, front-panel instrument DI, and balanced line inputs
    High-gain switch
    High-pass filter
    Hardwire relay bypass


Avalon VT-737sp Class A Mono Tube Channel Strip Specifications:

  • 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: 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-22kHz unweighted
    Distortion THD, IMD: 0.5%
    Frequency response -2.5dB: 10Hz-120kHz input filter included
    Frequency response -3dB: 1Hz-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-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-28kHz and 2kHz -28kHz, ±6dB range, hi-lo Q Low mid - variable 30Hz-450Hz and 300Hz-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: 22lbs. (10kg)


Avalon VT-737sp Class A Mono Tube Channel Strip

One year parts and labor warranty. 90 day warranty for tubes.

Get your gear covered!

Now you can get added warranty protection for your new gear. Pro Coverage steps in where the manufacturer's "normal wear and tear" ends. Our PRO COVERAGE program offers you UPGRADED COVERAGE if your product ever fails!

Pro Coverage includes:

  • Accidental damage protection (new gear only)
  • Expedited Repair
  • Free Shipping (for returns or repairs)
  • 100% Coverage for Commercial Use
  • Extended Return Period
  • Extended Price Protection
  • No Lemon Guarantee
  • Free Transfer of Coverage to a new owner
  • Repair Costs Covered for up to 3 years from date of purchase
  • Repairs Can Be Authorized Toll-Free by Phone or the via the web
Product Reviews
(Based on 6 reviews)
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Viewing Reviews 1 - 3 of 6 |
  • You get what you pay for

    As reviewed by dale de la Fuente on 1/15/2013

    I was in need of a new preamp and decided to go to a local guitar center just to look at what was in stock. I had been looking at the $300 ranged mic preamps that were in stock but then started looking at the avalon 737. From $300 to this was a big jump in price, but I'm glad I made the purchase. I've had the avalon 737 for about 6 months already and absolutely love it. I've used it to track hip hop and r&b vocals, but I've also used it on sax, drums, flute, clarinet, trumpet, and low brass. All I can say is that everything that was tracked using the avalon was amazingly smooth, clear, and crisp. My recordings have dramatically improved in presence and sound quality from years past with this single piece of equipment. It is well worth the price. It is built like a tank and holds the resell value very well in case you ever need to sell it later on. I would definitely recommend this.

    1 of 1 people found this review helpful.
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  • Big Boy Sound In A Two Space Rack

    As reviewed by James Greene on 4/24/2008

    Avalon is right on the money with this one. I use the Vt737 on just about everything. I even track stereo sources with the two that I have. I guess you could argue that there are better dedicated compressors, but the one in the Vt737 is more than adequate. The clarity is superb. For your front-end you can't go wrong with the Vt737sp. If you want to sound like the big boys you need big boy equipment.

    1 of 1 people found this review helpful.
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  • A awsome studio tool for any studio

    As reviewed by Fuzzball on 10/3/2006

    The Avalon VT737SP may be expensive but it is a very versatile studio tool. The unit has very usable preamps which I especially like using on acoustic guitars. The compressor is easy to use and it does a very good job (it seems to not leave many annoying artifacts). You can get everything from a gentle soft compression to a fast pumping over compressed signal (which is sometimes desired for unique applications). The de-ess control is also excellent to have, I found it very useful for a female singer that tended to over enunciate the s sound on tracks. The EQ is also very clean and smooth making this a great unit to use with many options.

    16 of 17 people found this review helpful.
    Was this review helpful?
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