Avalon VT-737sp Class A Mono Tube Channel Strip  

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Avalon

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.

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

Get tube warmth, a high-class mic pre, compression, and EQ all in one. Order today.

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)
Write a Review Overall Rating Customer Reviews 12 See all 12 customer reviews...

not so fast........................

| Review By: c.locke | 3 years, 5 months ago

1 people out of 1 found this review helpful

Features:
Quality:
Value:
Overall:
The avalon is alright, a lot of it is hype.  I had the chance to compare it to the la 610 mkii on every level and the la610 just sounded better period.  Depending on what sound your looking for, don't be fooled by the price.  I feel the la610 was more cleaner, although the avalon has more eq control you have to look at the whole pic. But every piece of gear has pro & cons.
Do you own the product?:
Yes
Have you used the product?:
No
Musical Experience:
recording engineer,composer
Style of music you play:
gospel hip hop
Where you live:
oklahoma city

Did you find this review helpful? yes no984237

Beautiful Sound at a large price

| Review By: 808 booming | 3 years, 10 months ago

1 people out of 1 found this review helpful

Features:
Quality:
Value:
Overall:
WARM & CLEAN...At the studio I used to work in, we would use this as the pre for almost EVERYTHING - vocals, acoustic guitar, bass, cello, violin, etc. While it's not a magic box, the difference between going direct into the board and using this is huge - like the difference between photographing in natural sunlight and under florescent lights. Not my favorite compressor, best used subtly & compressed later in the chain, but my favorite preamp of all.
Do you own the product?:
No
Have you used the product?:
Yes
Musical Experience:
Recording Engineer, Active Musician
Style of music you play:
Mod Rock, Funk, Hip Hop, Jazz, Metal
Where you live:
Hawai'i

Did you find this review helpful? yes no1088012

Nice Preamp

| Review By: Rahbaba | 4 years, 3 months ago

1 people out of 1 found this review helpful

Features:
Quality:
Value:
Overall:
Nice smooth sound.  The equalizer section is very useful and musical.  The compressor section is ok. If it had a limiter on it, that would help quite a bit.  Overall, it imparts a very nice sound to the source audio.  Oh, and I absolutely love the way a bass plugged directly into (front panel) sounds!  If you can't get good sounds out of this, sell your stuff and stick to recording to cassette decks.
Do you own the product?:
Yes
Have you used the product?:
No
Musical Experience:
Active Musicians
Style of music you play:
Blues, Rock, Pop, etc...
Where you live:
Germany

Did you find this review helpful? yes no964293

Nothing Holds A Candle...

| Review By: Uncaster | 4 years, 4 months ago

1 people out of 1 found this review helpful

Features:
Quality:
Value:
Overall:
The Avalon Vt 737sp is the be all end all preamp in my book... I have worked extensively with summit pres, neves pres, and even ssl stuff... nothing is a versatile and easy to use... The eq sound full and rich... the compresion is sweet and has cool ways you can feed it through the signal chain... also the natural tube distortion you can get is like nothing I've ever heard... bottom line you can't beat it... My only complaint would be it's price... I would love to buy a secound one for stereo tracking but I have to hold off because of the price... But trust me I own cheaper presonus and ART stuff... none of it holds a candle.............
Do you own the product?:
Yes
Have you used the product?:
No
Musical Experience:
Recording Engineer- Studio Owner
Style of music you play:
Rock - Blues - Jazz - Folk - R &B
Where you live:
Los Angeles, CA

Did you find this review helpful? yes no954793

Good but not Great

| Review By: JVPhillyBurbs | 5 years, 3 weeks ago

0 people out of 4 found this review helpful

Features:
Quality:
Value:
Overall:
I've been recording my vocals and a few friend's vocals with karaoke backing tracks for years now and could never figure out why I couldn't get that slick, warm professional "record" sound. So I bought one of these to see if it would do the trick. Unfortunately, it sounds about exactly the same as other methods/equipment I've tried. I have an AT 4033 mic going into a Firewire 410 and then into SONAR 5. I experimented by recording my vocals through a MACKIE CFX12 board and then simultaneously outputting one channel to the Avalon/FW and the other directly into the Firewire. Result: just about the same sound. I guess the magic is in the mixing and application of FX and double tracking, etc. Oh well, I guess I'm going to return the unit and be happy with the current front end of my recording (I also sometimes use an Aphex 107 preamp). The only real complaint I have is that the compressor didn't seem to have a limiter function. AS far as looks go, it's definitely a nice heavy duty professional looking unit but I think a lot of this "warmth" stuff is more in people's heads rather than in their ears. To be honest, I also did an A/B with the Aphex vs the Avalon and couldn't really hear any noticeable difference between the 2. Maybe this says a lot for the M-ADIO FW 410 - it sounds just as good!
Do you own the product?:
No
Have you used the product?:
Yes
Musical Experience:
30+, musician, vocalist, DJ
Style of music you play:
All
Where you live:
Philly Burbs

Did you find this review helpful? yes no935603

See all 12 customer reviews...
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