Audio Proz Service and Sales


Sundholm Model 402

Audio Proz Inv #: 46392

Stereo 3 way crossover. XLR and phone in/out. Very high quality crossover, serviced and tested. Excellent #9 condition with one small ding on top side of left rack ear.

$ 240  Contact Us  

Samson S-3-Way

Audio Proz Inv #: 32275

Brand NEW, Stereo 3-way, mono 4-way S3 Crossover. With phase/delay correction.

$ 180  Contact Us  

SAE 4000

Audio Proz Inv #: 18468

Nice AAA+ condition, overlapping audio bands for low/high x-over, balance control, excellent for subwoofer, cleand & calibrated, updated capacitor 2 rack space

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Rane AC 23

Audio Proz Inv #: 64168

Active 3 way, 4 way or 5 way stereo/mono crossover. Latest version spec with phase alignment correction Excellent design. Unit is within +/- 1db. Upgraded TRS 1/4 AC power connector and matching AC adapter. SN#8557  #9 condition virtually unused.

$ 228  Contact Us  

Rane AC 22

Audio Proz Inv #: 63533

Active 2-way, 2 channel crossover. Master level control for Channel 1 and 2.  Low settings include Mono sub level, delay and Mute button.Low Hi range adjustable from 70 Hz-3.6K Hz. High section has adjustable Inactive level 0-10. Comes with external power supply Model RS 1 (Part # 151-005) broken tab, supply need to be secured to unit. No Rack rash,  #8 condition   

$ 148  Contact Us  


We are presently operating on an APPOINTMENT ONLY basis. Please call us first at (617) 926-8020 to schedule an appointment before you come into the shop for repairs, rentals, product recommendations, consultations, or anything other than minor purchases.


Furman TX-3A

Audio Proz Inv #: 42476

Tunable 2-way stereo, 3-way mono, 2 input level controls, 4 output level controls. LIKE NEW.

SOLD  Contact Us  

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Furman TX-324

Audio Proz Inv #: 42475

NEW condition, w/box, packing, manual

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DBX 234 XL

Audio Proz Inv #: 54691

Unit is intact. Has 1 channel defective with broken controls. Sale for crucial working controls or specialized multi section sweep EQ filters. Controls, $18 each. Knobs and other parts available. #8

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Behringer Ultradrive Pro DCX2496

Audio Proz Inv #: 51878

Ultra high precision digital 24bit/96kHz loudspeaker management system. Like new condition with manual.

$ 228  Contact Us  

Behringer CX-2300

Audio Proz Inv #: 28351

2 way stereo, 3 way mono. Perfect condition, new old stock. XLR in/outs only. with adjustable limiters, adjustable phase delay, and adjustable lo/mid/hi output controls. An excellent electronic crossover! **New Low Price!**

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Audio Logic X23

Audio Proz Inv #: 16323

Very high-accuracy, well-built machine. XLR I/O, 2 way stereo, no manual or power cord. As new. **New Low Price!**

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We have been selling and repairing professional and consumer audio equipment for over 40 years. (Read some of our customers testimonials here)

We keep our database up to date with almost 10,000 items in stock. If you see a part number and a price, we have that item in stock. 

Customers outside of the US, please note that international shipping can be costly (US Post $16 minimum - up to 8oz or 226g). We are glad to combine orders to reduce shipping costs. Take a look at our shipping policies for more information and estimates of prices and shipping time.


Audio Logic X22

Audio Proz Inv #: 26996

2 channel adjustable crossover. Input level. High and low level out. Norm/rev phase switch high and low, mute switch high and low. CD EQ switch. Ground lift and stereo/mono sum. 1 space chassis w/rack ears.

SOLD  Contact Us  

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Ashly XR22E

Audio Proz Inv #: 16685

160 to 8K x-ver zone, all input and output levels, 12 db per octave, recently cleaned and serviced. Stereo 2-way

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Ashly XR1001

Audio Proz Inv #: 47090

2-way stereo, 3-way mono. Very accurate crossover with variable response to correct for crossover aperture. Professionally cleaned and service. Excellent #9 condition with scratch on one side of rack ear.

SOLD  Contact Us  

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Ashly SC-77

Audio Proz Inv #: 27644

3 way stereo crossover, 2 Rack Space - 2 channels, Older Unit, Face plate cosmetically good, ruggedized machine, controls good, with mono subwoofer out, all cleaned, tested OK, minor ground update.

$ 240  Contact Us  

Ashly SC-70

Audio Proz Inv #: 48132

3-way crossover with modified ADD board for subwoofer out; effectively now a 4-band crossover. Completely cleaned, serviced, tested. Good #7 condition with much wear at rack edges, but all controls are tight and clean.

$ 130  Contact Us  

Ashly SC-22

Audio Proz Inv #: 16339

2-way stereo, balanced phone jack in, 160 to 8k x-over freq, 1 U space., EXC condition

$ 220  Contact Us  


We know you have many options for purchasing audio equipment and parts, and we truly appreciate your business.  We strive to offer good products at competitive prices.  While we can't always match the prices of one isolated reseller, we make up for it by carefully selecting, testing, and finding unique and special rare parts, and we are here for the long run.  We guarantee everything we sell and we hope it helps you to enjoy a great listening experience.

We keep our database up to date with almost 10,000 items in stock. If you see a part number and a price, we have that item in stock. 

Customers outside of the US, please note that international shipping can be costly (US Post $16 minimum - up to 8oz or 226g). We are glad to combine orders to reduce shipping costs. Take a look at our shipping policies for more information and estimates of prices and shipping time.


Advent Legacy crossover

Audio Proz Inv #: 51650

Board and panel with fuse holder. Measures 3+7.8" x 5.5". Excellent condition.

$ 20  Contact Us  

ADS L9e crossover upgrade

Audio Proz Inv #: 46998

We are very experienced in the repair and modification of this crossover. Our upgrade improves fidelity, phase response and correctness, power handling, and allows the speaker to output stronger bass. Originally ADS had a very pronounced midrange that was also prone to causing driver failures. Our modification solves both problems! Phase response is especially improved in the voice/midrange to produce a more complete and seamless sound character. We use matched spec mylar capacitors and other audiophile grade parts. $220 includes all parts, labor, and return shipping to modify one pair of crossover boards. Most hobbyists have found it is quite easy to (carefully!) remove the board and connectors out of the speaker.

$ 220  Contact Us