AGB Compressor
AGB Compressor BackAGB Compressor Interior

AGB Compressor (discontinued)


Introducing another member of the BLA product line: the AGB Compressor. An homage to the venerable Neve 33609, the AGB is a two-channel diode compressor and limiter housed in a 2U rackmount chassis.

Imagine a quick, responsive, low-noise compressor with powerful control features. It does everything from smooth and easy compression to weird rhythmic clicks and funky envelope tricks. It’s insanely fast and doesn’t choke when you really push it. Strap it across your drum buss and smash away. Give your snare a nice, dense crack. Use it for program material. The slower attack mode is great for vocals. Whatever you use it on, you’ll find it does the job amazingly well.


Out of stock

SKU: AGBcompr. Category: .

Product Description

Like the original Neve 33609, the AGB uses input, interstage, and output transformers. When in bypass, these transformers can still be used to add coloration to your tracks. The key input allows you to trigger compression from a track other than the one being compressed, and the limiter can be used on anything from hard-hitting kick drums to smashing an entire 2-mix. The stereo link is another great feature for any material requiring equal treatment on both channels.

So, where does our design differ from the original Neve 33609? For one, the signal path is a fully balanced, op-amp based circuit that allows for lower noise compression. We’re also using rotary potentiometers instead of stepped potentiometers, which gives you more control over things like input level and attack time.

But don’t just take it from us. Check out the Raves tab above!


  • Input Trim:  Fully clockwise = unity gain
  • Threshold:  -20dB to about +10dB
  • Ratio:  1.5:1 to 6:1
  • Release:  100ms to 1.5 seconds
  • Slow Attack:  Standard setting is fastest and is designed to catch transient spikes. When pushed in, the attack response time slows down by a factor of about 10 to compensate for slower moving parts like vocals.
  • Key In:  When pushed in, it switches the detector’s sample signal from the standard input signal to the “key input” jack on the back of the unit.
  • Compress In:  Engages the compressor.


  • Threshold:  +4 to +15dB:  This is post makeup gain, so raising the makeup gain can raise the level of the output signal enough trigger the limiter.
  • Release:  50ms to 600ms
  • Fast Attack:  Cuts the attack response time for the limiter in half.
  • Limit In:  Engages the limiter section. The limiter is triggered from the output, so the compressor section’s signal reduction will reduce the signal’s triggering of the limiter. The limiter can work without the compressor engaged, just as the compressor can still work without the limiter engaged.
  • Stereo Link:  Puts the unit into stereo mode. This runs both channels of compression and limiting from the detector in Channel 1. In link mode, Channel 1’s compressor and limiter settings control both channels. Input trim and makeup gain settings for each channel remain independent of each other.
  • Makeup Gain:  Compensates for the signal reduction from compression. Bypassing the compressor bypasses the makeup gain stage.
  • Gain Reduction Meters:  Monitors the amount of signal reduction by both the compression stage and the limiter stage. In stereo mode, both meters will track the same because both are triggering from Channel 1’s detector circuit.


“So far I am in awe of the thing. Absolutely no noise at any level! I mean zero noise. I love it on the 2 bus, which is what I bought it for. I have a TG1, ELOP, and a few others, this thing is invisible when it’s working hard. For [$1500] it is hard to imagine a better unit. I would think this would kick butt on acoustic guitar and sparkly lead guitar. I ran a folk mix with banjo and Mando through and it made the whole thing sparkle. Ran a full band pop mix through and it added a bit of finish and glue. I love cranking the input to 10! Seriously people, this unit is awesome. Might get a few more…”

Mark Palmer, Royal Laundry Studios, (as posted on GearSlutz forum)


“I received my AGB today and I am SO IMPRESSED! Already recorded acoustic guitars and tambourine through it and it just gives something so rich and smooth to everything while at the same time being a grippy transient shaper…

Also played around on a drum stem and it SINGS! It even [revealed] stuff that wasn’t there before when pushed hard!

The attack times are perfectly selected and the metering is just such a blessing!… haven’t been that impressed with a piece of gear since I got my massive passive!”

Zino Mikorey, EMBIZ Studios, Cameroon, Africa


“OK, got a chance today to start putting the AGB compressor through its paces. I am stunned. Just stunned, on how amazing this piece of equipment is sounding on my rig. Truly a game changer and will go down as a very sought after piece of equipment… [When using] the AGB with no compression or limiting[,] the unit imparts a subtle but very musically pleasing analog quality to the track. The unit adjustability is awesome and comparing it to our LA-610, T4 Opto-Compressor, or Avalon: I much prefer the AGB. The sound is extremely transparent and the attack and release adjustability lets you dial in exactly what you need. Where it truly comes into its own is when we start stacking the tracks and summing. The song is “in your face” without stepping on itself. It is just astonishing and for the price the best buy I have ever made on a piece of gear. We are using it as compression for drums on the master bus, guitars and vocals… Also have been chaining it with my Auteur as well as my sebatron vmp on the front end going into the box and WOW. BLA has outdid themselves… Epic. Truly Epic… This is going to be a vital piece of gear in the recording mixing chain indefinitely. Thanks for such a great piece of gear.”

Jon Davis, Argon Sound Production, Odenville, AL


“An extremely awesome company, I strongly suggest buying [the] Black Lion Audio AGB Compressor.”

Bryan (click link to read full review)


“Loving my AGB comp… really… it has sounded great on EVERYTHING I have put it on so far. Thanks guys!

Michael DiCrescenzo


“I’ve never ever had a compressor on my mixbuss that was as transparent as the AGB. I have a lot of compressors, but this one is the cheapest, best sounding, easiest to mix thru EVER! Thanks a lot for your great products!!”

Peter Claes, Hasselt, Belgium


“[…have been using] your AGB compressor and I love it. Great on the drum bus for stuff that is more chill and doesn’t require stuff to be slammed. I love it on certain vocals and all guitars as well. I did a shoot out at a studio in Ann Arbor MI that has a Neve 33609 and it is very/very similar. Yours allows a bit more bottom end to pass through which is great for todays music. Money well spent…”

Jake Rye, President/Owner of Sonus Clarus Media Group, Tecumseh, MI


“All I’m doing is using a Digi002’s 8 analog outputs to make 4 stereo stems, into your PM8, then into the BLA 2-channel comp and EQ. The difference between that and mixing ITB is unreal! Thank you for making this way more fun and exciting for me.”

Thom Daugherty





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If you aren’t completely satisfied with your purchase, you can return or exchange it for up to 14 days from the time you receive it. Items must be in their original packaging and in “new” condition to be eligible for a return or exchange. Refunds will only be processed after a returned item has passed our quality control inspection. We can only accept returns or exchanges for items bought directly from us. Please email us at to request an RMA form. Returns and exchanges that don’t include a completed RMA form in the box cannot be processed. Return shipping is not covered by B.L.A.


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If your B.L.A. product is in need of a repair that isn’t covered by our warranty, please email us at to request an RMA form. Repairs that don’t include a completed RMA form in the box cannot be processed. We charge a nominal bench fee that covers most repairs. If the cost of a repair exceeds the bench fee, we will contact you.