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Black Lion Audio B172A FET/Optical Compressor , $999.00 - Add to Cart Skip to Product Information

Black Lion Audio B172A FET/Optical Compressor

FET/Optical Compressor with 76 and 2A Circuits, A/B-B/A-Independent Switching, and Stereo Linking
Item ID: B172A
Black Lion Audio B172A FET/Optical Compressor
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Black Lion Audio B172A FET/Optical Compressor
In Stock!

Only 1 left in stock! Order Soon!
Instant Savings: $400.00

FET and Opto Compression in the Same Unit

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Our Product Research Team

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You want it all. We get it. That's what's so enticing about Black Lion Audio B172A. Two classics in one chassis, the B172A marries BLA's Seventeen version of the legendary "76" FET limiter with their take on the renowned "2A" tube optical compressor. Which means this dynamic duo can serve up any flavor of compression, from gentle and transparent to crushed and dirty — and everything in between. Most world-class studios have both original classic units in their outboard racks. Now you can too — without breaking the bank.

Incredible sound and versatility

Having struck gold with their Seventeen (a certified hit at Sweetwater), it was not unexpected that the hot-modders at Black Lion Audio would come out with a classic tube compressor. But putting both circuits the same unit is a stroke of genius. Whether you use the FET and opto separately — or in series, where one catches the audio's peaks and the other provides the heavy compression — the Black Lion Audio B172A will blow you away with its incredible sound and versatility. The B172A's Dual Mono Link makes it easy to route your signal through the 17 and 2A circuits in any order.

The best opto cell in the business

The success of Seventeen prompted Black Lion Audio to pair their proven FET circuit with an equally effective optical design. The challenge was met with a custom T4B opto cell, the T4BLA. BLA’s extensive experience in modifications gave the designers the requisite patience and mindset to tweak the optical element until it was perfect. With an emphasis on meticulous detail, the T4BLA was designed to be the best T4B opto element available today.

Big iron

Painstaking effort went into choosing the best transformers needed for each circuit. Spec'd with a Cinemag input transformer on the 2A side, BLA’s own Chicago-wound output transformers on both circuits, high-grade signal path and decoupling capacitors, the B172A gives you ultra-convenient access to a pair of classic dynamics processors while also providing a valuable signal processing tool never before available in a single chassis.

Flexibility is key

Since its initial concept, flexibility was a main goal of the B172A design. While many engineers are in agreement on the sonic benefits of using both compression types, the routing order is subject to debate. The AB-BA switch on the B172A allows for quick internal routing of the signal, so you can instantly compare between the two. The two compressors can also be used independently of each other when setting the AB-BA switch to its center (link off) position. Each circuit also features stereo linking, letting you link a pair of B172A units in stereo.

About Black Lion Audio

Founded in Chicago in 2006, Black Lion Audio has made their mark on the audio industry by hot rodding audio equipment and upgrading the sound quality of popular music-production gear, elevating industry-standard products to new levels of sonic quality. Though they started off modding gear from other manufacturers, they've utilized their cumulative expertise to design their own line of boutique mic preamps and word clocks. BLA gear and modded gear can be found in studios from LA to New York to Nashville and heard on projects from artists like Maroon 5, Alison Krauss, Metallica, T-Pain, George Strait, MGMT, Beyonce, George Duke, Slayer, Erykah Badu, Rod Stewart, and more.

Black Lion Audio B172A FET/Optical Compressor Features:

  • 76- (Seventeen) and 2A-style compression in a single 2RU chassis
  • A/B, B/A, and Independent signal routing switchable on faceplate
  • Cinemag 2A input transformer
  • Chicago-wound 76 and 2A output transformers
  • Custom-designed Black Lion Audio T4B opto element
  • High-grade signal path and power decoupling capacitors
  • Stereo linkable

Warranty Info

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Offer applies only to single-receipt qualifying purchases. Select manufacturers may require that only the manufacturer’s products qualify towards the minimum purchase amount needed to be eligible for promotional financing. Otherwise, an invoice that meets the minimum purchase amount and contains at least one qualifying manufacturer product is eligible for promotional financing. No interest will be charged on promo purchase balance, and equal monthly payments are required on promo purchase until it is paid in full. The payments equal the amount financed divided by the number of months in the promo period, rounded up to the next whole dollar. These payments may be higher than the payments that would be required if this purchase was a non-promo purchase. During the last month(s) of the promo period the required monthly payment may be reduced due to the prior months’ rounding. Regular account terms apply to non-promo purchases. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

Offer applies only to single-receipt qualifying purchases. No interest will be charged on the promo balance if you pay it off, in full, within the promo period. If you do not, interest will be charged on the promo balance from the purchase date. The required minimum monthly payments may or may not pay off the promo balance before the end of the promo period, depending on purchase amount, promo length and payment allocation. Regular account terms apply to non-promo purchases and, after promo period ends, to the promo balance. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

The estimated required monthly payment shown which excludes taxes and delivery equals the amount financed divided by the number of months in the promo period, rounded up to the next cent. During the last month(s) of the promo period the required monthly payment may be reduced due to this rounding. These payments apply only with the financing offer shown. If you make these payments by the due date each month, you should pay off this amount financed within the promo period, if it is the only balance you are paying off. If you have other balances on your account, this payment will be added to any other minimum monthly payments.

Applies only to select items from this manufacturer. Ask your Sweetwater Sales Engineer for more details.