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Black Lion Audio B173 Quad Microphone Preamp , $1,499.00 - Add to Cart Skip to Product Information

Black Lion Audio B173 Quad Microphone Preamp

4-channel Mic Preamp with Transformer-balanced I/O and DI Inputs
Item ID: B173Quad
Black Lion Audio B173 Quad Microphone Preamp
$ 1,499 .00
We Can Get It Fast!

While this isn't an item we normally stock, we can still get it to you as fast as possible due to our great relationship with Black Lion Audio. Go ahead and place your order and we'll follow up shortly to let you know when to expect it. Estimated October 21, 2026

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Black Lion Audio B173 Quad Microphone Preamp
We Can Get It Fast!

While this isn't an item we normally stock, we can still get it to you as fast as possible due to our great relationship with Black Lion Audio. Go ahead and place your order and we'll follow up shortly to let you know when to expect it. Estimated October 21, 2026

$ 1,499 .00

Pack Your Rack with the Sound of '73

This article was Written By

Our Product Research Team

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Its design inspired by a legendary vintage British console mic preamp, the 1073, the Black Lion B173 Quad packs a massive punch, delivering the muscular lows, assertive mids, and glossy highs characteristic of a vintage 1073 in a budget-friendly 2RU unit. The B173 Quad features high-end parts and discrete Class A circuitry with transformer-coupled input and output stages. With 70dB of gain on tap, the B173 Quad serves up heaping portions of low-noise headroom. Now you'll finally be able to use your low-output ribbon mics on quiet sources! The B173 Quad imparts a bold sonic assertiveness that beefs up any signal you pass through it. This is the sound that launched a thousand hits.

Big-iron upgrades and more

The B173 Quad is a 4-channel version of the company's single-channel model. More than just another 1073 clone, the B173 Quad combines vintage-inspired sonics and modern features in a rugged 2RU chassis with a smart feature set that will satisfy the most demanding audio engineers. A revised gain stage and lower noise floor deliver cleaner sound with lower distortion, while CineMag input and output transformers keep things warm, creamy, and beefy. Two front-panel DIs impart harmonic richness to guitars, basses, and synths, while stepped input gain and variable output attenuation give you exacting control over transformer saturation. Per-channel metering displays how hot your output signal is hitting the parallel TRS/XLR outputs, while an external power supply keeps noise out of your tracks. At Sweetwater, we dig the Black Lion B173 Quad. It's an amazing value and sounds great. Mount one or two of them in your rack and get to work.

Excellent hot-mod preamp value

Since 2006, Black Lion Audio has helped musicians and engineers improve the sound of their equipment, and they've built a solid reputation for coaxing world-class sound out of modestly priced gear. As an outfit that cut its teeth doing acclaimed mods, Black Lion, unsurprisingly, produces innovative audio equipment of their own design that consistently outperforms its price range.

Black Lion B173 Quad Mic Preamp Features:

  • 4-channel preamp with USA CineMag input and output transformers
  • Designed and assembled in the USA
  • Bandwidth (1kHz, 150Ω unbalanced source, unweighted): 10Hz–30kHz
  • 70dB of gain handles any type of microphone, including low-output ribbons
  • Per-channel gain and output controls, phantom power, polarity reverse
  • DI input and hi-Z switch on channels 1 and 2

Warranty Info

Sweetwater's FREE 2-Year Total Confidence Coverage Warranty

Extra peace of mind at no extra cost.

  • Save money with FREE parts and labor
  • Get back to making music with the industry's fastest turnaround time
  • Fix it the first time with our award-winning, factory-certified Service Department
Learn More about Total Confidence Coverage

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.