Signal Processors

signal processors — pre-owned

373listings

Browse 373 signal processors — pre-owned on eBay — listings updated every few minutes. All items are pre-owned and sold by eBay sellers directly.

Black Diamond 7-Band Stereo Equalizer/Crossover Pre Amp Equalizer - EQ7LS
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Certified - RefurbishedBuy It Now

Black Diamond 7-Band Stereo Equalizer/Crossover Pre Amp Equalizer - EQ7LS

The unit has the ability to fine tune your audio system while giving you the ability to add a unique touch to your sound. The Black Diamond EQ7LS is a crossover designed to be adjusted on the fly. By switching using the main / aux switch you can also use two separate input signals.

$22.46
Free ShippingMiami, US
ds18soundTOP
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99.5%Excellent· 30.8k
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Parker Normally Closed Solenoid Coil Assembly R23 11 Watts 11050 12060 G2U
UsedBuy It Now

Parker Normally Closed Solenoid Coil Assembly R23 11 Watts 11050 12060 G2U

Check item specifics and photos to ensure you make the perfect choice.

$44.95
See listingBensenville, US
shipcycle
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97.0%Good· 49.5k
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NVX XLOC66X 6 inputs / 6 outputs Line Output Converter with Remote Level Control
UsedBuy It NowBest Offer

NVX XLOC66X 6 inputs / 6 outputs Line Output Converter with Remote Level Control

The NVX XLOC66X is a 6-channel line output converter designed for car audio systems. This converter, made in China, allows for easy installation and conversion of audio signals from the car radio to the speaker system. The built-in remote level control provides added convenience for adjusting audio levels. With its 6 inputs and 6 outputs, the NVX XLOC66X is a versatile and reliable option for enhancing your vehicle's audio experience.used condition but works

$47.00
See listingLouisville, US
jamaree-3
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93.3%Low· 43
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Gravity EQ15 1/2 Din 5 Band Car Audio Equalizer EQ Front, Rear + Sub Output 9V
UsedBuy It NowBest Offer

Gravity EQ15 1/2 Din 5 Band Car Audio Equalizer EQ Front, Rear + Sub Output 9V

The Gravity EQ15 1/2 Din 5 Band Car Audio Equalizer is a top-notch audio component designed for car audio systems. With a 5-band EQ including frequencies of 50Hz, 125Hz, 900Hz, 2.2kHz, and 16kHz, this equalizer allows for precise sound tuning for optimal audio quality. It features both front and rear outputs, as well as a subwoofer output for enhanced bass response. Compatible with main and aux inputs, this unit comes with a 1 full year warranty for added peace of mind. Its compact dimensions of 7" wide, 4 1/8" deep, and 1" high make it easy to install in most vehicles.

$30.00
See listingClearwater, US
patricio-obreque
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98.3%Excellent· 290
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Boss AVA1204 7 Band Car Equalizer w/ Subwoofer Output LED Meter X-Bass RCA
UsedBuy It Now

Boss AVA1204 7 Band Car Equalizer w/ Subwoofer Output LED Meter X-Bass RCA

$35.00
Free ShippingKingman, US
mallorystreasures
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99.7%Excellent· 3.3k
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Boss Audio System BX55 2way/3way Electronic Crossover - Silver - Clean - Works
UsedBuy It NowBest Offer

Boss Audio System BX55 2way/3way Electronic Crossover - Silver - Clean - Works

Clean, working, great condition. OEM manual included. Ships well padded. The Boss Audio System BX55 2way/3way Electronic Crossover in silver is a sleek and powerful subwoofer designed for car audio systems. Produced by BOSS Audio Systems, this electronic crossover allows for precise control over your audio signal, ensuring a clean and clear sound experience. With its compact size and sleek black design, the BX55 is a reliable choice for enhancing your vehicle's audio system.

$39.99
+$10.83Castle Rock, US
coflo_palm
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99.7%Excellent· 708
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DS18 EQX5 8 Volt 5 Band Car Stereo Equalizer Subwoofer Control RCA Speaker Input
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Certified - RefurbishedBuy It Now

DS18 EQX5 8 Volt 5 Band Car Stereo Equalizer Subwoofer Control RCA Speaker Input

This high-strength 5-band stereo equalizer/crossover is the upgrade needed to achieve your audio dreams. Harnessing the power of its five bands, including frequencies of 50Hz, 315Hz, 800Hz, 2.2KHz, and 12KHz, the EQX5 ensures the most precise audio reproduction.

$43.96$47.32-7%

You save $3.36

Free ShippingLa Mesa, US
stereo-needsTOP
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99.8%Excellent· 106.9k
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AudioControl LC2i 2 Channel Line Output Converter
-10%
UsedBuy It Now

AudioControl LC2i 2 Channel Line Output Converter

Product info:2-channel active line output converterdesigned to work with most factory systemsInputs and outputs2 speaker-level inputs with 400 watts RMS power handlingMain (full-range)and Bass (for subs) preamp-level outputslevel matching controlssubwoofer level control output (for optional wired remote)AccuBASS circuitry restores bass signal

$45.00$50.00-10%

You save $5.00

+$6.08Tacoma, US
dechhaw_0
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100.0%Excellent· 5
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Massive Audio EQ7X In-dash 7-Band Graphic Car Equalizer 1/2 Din EQ 8 Volt Rca
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UsedBuy It Now

Massive Audio EQ7X In-dash 7-Band Graphic Car Equalizer 1/2 Din EQ 8 Volt Rca

Free Shipping Free Returns Please inspect pics to confirm fitment and part condition prior to purchase Any notable defects will be shown in pics

$44.99
Free ShippingFort Lauderdale, US
zbestproductsTOP
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100.0%Excellent· 256
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RADIO SHACK 100 Watt 2-Way Crossover Networks No. 40-1305 Lot Of 2 Tested
UsedBuy It NowBest Offer

RADIO SHACK 100 Watt 2-Way Crossover Networks No. 40-1305 Lot Of 2 Tested

In good condition tested, came off Jbl cabinets, free shipping

$45.00
Free ShippingHebron, US
wilshirefinds
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99.2%Excellent· 642
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Pioneer CD-625 Vintage Electronic Crossover Network Black Old School UNTESTED
UsedBuy It NowBest Offer

Pioneer CD-625 Vintage Electronic Crossover Network Black Old School UNTESTED

Appears structurally in good condition. Scratches and scuffs throughout. Includes mounting bracket. Due to the product not being tested, it could be for parts/repair and may need further servicing.

$40.00
+$10.22Waterford, US
brotherly_buys
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99.9%Excellent· 2.8k
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Diablo DB-90X Car Audio Digital Bass Processor - AO4074442
UsedBuy It NowBest Offer

Diablo DB-90X Car Audio Digital Bass Processor - AO4074442

See pics for full condition, no other accessories included. JDS 6991 4C2.

$15.00
See listingWichita, US
aokinc
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99.9%Excellent· 25.1k
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Old School Rockford Fosgate MBX-124 Passive Midbass Crossover 4-Ohm Vtg Parts
-30%
For parts or not workingBuy It NowBest Offer

Old School Rockford Fosgate MBX-124 Passive Midbass Crossover 4-Ohm Vtg Parts

Untested Selling as is not working see picture for more details has scratches

$26.25$37.50-30%

You save $11.25

+$11.00Reedley, US
vinobarrera1
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99.7%Excellent· 4.0k
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Nemesis Audio 2 Way High-Performance Crossover for Car Audio
UsedBuy It NowBest Offer

Nemesis Audio 2 Way High-Performance Crossover for Car Audio

Nemesis Audio 2 Way High-Performance Crossover for Car Audio

$19.00
See listingEl Paso, US
per_9191
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98.9%Excellent· 258
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Olympus OTV-S4 Digital Signal Processor
-46%
UsedBuy It NowBest Offer

Olympus OTV-S4 Digital Signal Processor

OLYMPUS OTV-S4. Manufacturer: OLYMPUS. Every inquiry is of utmost importance and we treat it as such. We strive to provide 5-star service in every category you can rate us on! We greatly look forward to working with you!

$38.87$71.99-46%

You save $33.12

See listingVictor, US
esourceplus
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99.1%Excellent· 188.9k
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Hertz 2W.10 Crossroads Vintage Car Crossovers Tested Working
UsedBuy It NowBest Offer

Hertz 2W.10 Crossroads Vintage Car Crossovers Tested Working

The product is a set of Hertz 2W.10 car crossovers that have been tested and confirmed to be in working condition. As signal processors specifically designed for car audio systems, these crossovers are essential components for optimizing sound quality and managing audio signals in a vehicle's audio system. The Hertz brand is known for its high-quality audio products, making these crossovers a reliable choice for enhancing the audio experience in a vintage car.

$40.00
See listingAlton, US
fantomdesign
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100.0%Excellent· 246
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Boss Component Speaker Crossover unit PC65.2C 500 Watt RM 250 Watt  P24003289
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UsedBuy It Now

Boss Component Speaker Crossover unit PC65.2C 500 Watt RM 250 Watt P24003289

PreOwned Boss Component Speaker Crossover unit PC65.2C 500 Watt RM 250 Watt P24003289 tested in good working order.

$10.00
+$5.99Manorville, US
movingm3rchTOP
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100.0%Excellent· 686
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9 Band Car Audio Graphic Equalizer EQ W/Front Rear +Sub Outputs, 8V RMS for Car
UsedBuy It Now

9 Band Car Audio Graphic Equalizer EQ W/Front Rear +Sub Outputs, 8V RMS for Car

9 Band Car Audio Graphic Equalizer EQ W/Front Rear +Sub Outputs, 8V RMS for Car. Condition is Used. Shipped with USPS Ground Advantage.

$24.01
See listingHyattsville, US
vill-5327
Feedback
99.7%Excellent· 790
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Phonics Digital PD-BX Digital Bass Reconstruction Processor Illegal Bass
-10%
UsedBuy It Now

Phonics Digital PD-BX Digital Bass Reconstruction Processor Illegal Bass

Digital Bass Reconstruction Processor. Key Features. Dash remote connection. L and R outputs.

$16.19$17.99-10%

You save $1.80

+$6.49Logan, US
knothing5
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100.0%Excellent· 490
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Alpine XM RADIO  TUNER MODULE TUA-T020XM SATELLITE MODULE
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UsedBuy It NowBest Offer

Alpine XM RADIO TUNER MODULE TUA-T020XM SATELLITE MODULE

Alpine XM RADIO TUNER MODULE TUA-T020XM SATELLITE MODULE, REMOVED IN WORKING ORDER. NO CABLES OR ANYTHING ELSE THAT IS NOT PICTURED INCLUDED. BID ACCORDING. (SHLF 4 BIN 1)

$36.00$45.00-20%

You save $9.00

Free ShippingPompano Beach, US
toe*super*storeTOP
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99.9%Excellent· 7.1k
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HITRON HB-2 Digital Bass Processor, No Remote UNTESTED
UsedBuy It Now

HITRON HB-2 Digital Bass Processor, No Remote UNTESTED

The price reflects the untested status of it. I have no way to test it but if you study the pictures closely it does not look as if it has ever been installed.

$15.00
+$10.00Tucson, US
hauptmann187
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98.4%Excellent· 654
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Audiobank AB-AP14 Digital Bass Machine Used - Car Audio Control Unit
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UsedBuy It Now

Audiobank AB-AP14 Digital Bass Machine Used - Car Audio Control Unit

Audiobank Digital Bass Machine AB-AP14. It has been tested to ensure functionality and is ready for installation in your vehicle. Designed for enhancing bass response in your car audio system. Upgrade your car audio.

$32.00$42.00-24%

You save $10.00

Free ShippingLivermore, US
audiowattstoreTOP
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98.7%Excellent· 89.0k
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Hifonics BXIPRO3.0 Digital Bass Processor ONLY - Car Audio - TESTED WORKING
UsedBuy It Now

Hifonics BXIPRO3.0 Digital Bass Processor ONLY - Car Audio - TESTED WORKING

Only what is shown is included. No remote / adjustment knob. I hope you're having a blessed day! SATISFACTION GUARANTEED. If you have any issues with your purchase, please contact me before leaving feedback so I can make it right! Thank you so much for viewing my item! Hifonics BXIPRO3.0 Digital Bass Processor ONLY - Car Audio - TESTED WORKING

$49.95
Free ShippingMckinney, US
retrofit.resale
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99.8%Excellent· 2.0k
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Realistic Stereo 7-Band Equalizer Under Dash - Great Sound Control
UsedBuy It Now

Realistic Stereo 7-Band Equalizer Under Dash - Great Sound Control

Enhance your car audio experience with this Realistic Stereo 7-Band Equalizer. Designed for under-dash installation, it features adjustable frequency bands for precise sound tuning. Perfect for audiophiles looking to customize their vehicle's sound system.

$45.00
+$10.00Pocatello, US
zbay025
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98.4%Excellent· 6.3k
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MTX RT-XO1A  Electronic Crossover Used, Scratches, Rust
-20%
UsedBuy It NowBest Offer

MTX RT-XO1A Electronic Crossover Used, Scratches, Rust

MTX RT-XO1A Electronic Crossover Used, Scratches, Rust. Still working condition if you have any questions, please feel free to reach out and the product is being sold as is.

$32.00$40.00-20%

You save $8.00

See listingSan Antonio, US
jadenacescloset
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99.8%Excellent· 565
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Kenwood kpx-t120 old  school passive crossover
UsedBuy It Now

Kenwood kpx-t120 old school passive crossover

Found this from my old Kenwood system. It's pretty rare. In excellent condition. Its a tri-mode passive crossover.

$50.00
+$15.00Pittsburg, US
el_drake2000
Feedback
98.8%Excellent· 1.7k
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Cerwin-Vega IOEMHL 2 channel line output converter, used. Free shipping!
UsedBuy It Now

Cerwin-Vega IOEMHL 2 channel line output converter, used. Free shipping!

Cerwin-Vega 2 channel line output converter. IOEMHL, slightly used in good working condition tested and verified before removal. 12 volt. No cables or wiring included and not available. Fast and free shipping, message for any questions.

$34.00
Free ShippingAdell, US
germanboy1957
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100.0%Excellent· 1.2k
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RARE BLAUPUNKT SC-XN-P Frequency Crossover Network 3 Way LC 20-600HZ  Germany
UsedBuy It Now

RARE BLAUPUNKT SC-XN-P Frequency Crossover Network 3 Way LC 20-600HZ Germany

Blaupunkt SC-XN-P. Just got this in at an estate sale in a bin of vintage electronics Almost everything else was new in original boxes and this was wrapped really well. I got info on this from only one on eBay which sold for $124. This one has more wires and a lower price

$20.50
+$11.99Punta Gorda, US
edstubb1
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100.0%Excellent· 2.2k
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PAC LP7-4 L.O.C. PRO Series 4-Channel Line Output Converter with Remote Turn On
UsedBuy It NowBest Offer

PAC LP7-4 L.O.C. PRO Series 4-Channel Line Output Converter with Remote Turn On

PAC L.O.C.PRO LP7-4 4-channel line output converter with remote turn-on. (See photo showing harness config). All works as designed. LP7-4 converter module. Built-in remote turn-on output. Speaker-level input capable.

$49.00
Free ShippingBerkeley, US
akatzim
Feedback
100.0%Excellent· 94
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Audiotek Seven Band Equalizer
UsedBuy It NowBest Offer

Audiotek Seven Band Equalizer

The Audiotek Seven Band Equalizer, model AT 8700DSP, is a car audio signal processor with equalizer features. It is made by Autotek and allows for precise tuning of audio frequencies to customize the sound in your vehicle.

$35.00
See listingWest Haven, US
sa_moreh
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POWER ACOUSTIK 3-Way Stereo Electronic Crossover Network - Model C-3B NOT TESTED
For parts or not workingBuy It NowBest Offer

POWER ACOUSTIK 3-Way Stereo Electronic Crossover Network - Model C-3B NOT TESTED

The POWER ACOUSTIK 3-Way Stereo Electronic Crossover Network, Model C-3B, is a signal processor designed for car audio systems. Made by Power Acoustik, this crossover is capable of splitting the audio signal into three separate channels for customized sound control. Perfect for those looking to enhance the sound quality and dynamics in their vehicle, this electronic crossover network offers a versatile solution for optimizing audio performance. NOT TESTED RETURNS ARE ACCEPTED (buyer pays for return)

$30.00
See listingChino, US
d**z34
Feedback
98.8%Excellent· 2.5k
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Planet Audio PEQ10 Car Equalizer - 4 Band, Pre-Amp, Half Din, Subwoofer Output
UsedBuy It NowBest Offer

Planet Audio PEQ10 Car Equalizer - 4 Band, Pre-Amp, Half Din, Subwoofer Output

The Planet Audio PEQ10 Car Equalizer is a 4-band pre-amp with a half din subwoofer output, designed for car audio systems. With a sleek black color and compact dimensions of 8.98x7.68x1.85 inches, this equalizer is easy to install and provides a powerful signal processing solution for optimizing your vehicle's sound system. The included components like batteries and lithium metal cells ensure that you have everything you need to get started on enhancing your car audio experience. Perfect for audiophiles looking to fine-tune their vehicle's sound system, the Planet Audio PEQ10 is a reliable choice from a trusted brand.

$42.50
See listingRego Park, US
ronnies-garage
Feedback
100.0%Excellent· 129
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4 Channel High to Low Level Converter with Auto Turn-On and Speaker Emulator
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Certified - RefurbishedBuy It Now

4 Channel High to Low Level Converter with Auto Turn-On and Speaker Emulator

Featuring auto turn-on, speaker emulator, noise rejection, and RCA outputs for pristine sound. Compact, durable, and easy to install—ideal for seamless integration. Input Impedance: 45 Ohms (Speaker Emulator).

$40.46
Free ShippingMiami, US
ds18soundTOP
Feedback
99.5%Excellent· 30.8k
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Coustic Mobile Electronic Crossover XM-1
UsedBuy It Now

Coustic Mobile Electronic Crossover XM-1

See pictures.

$37.98
Free ShippingSacramento, US
olegboss
Feedback
99.3%Excellent· 3.6k
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Rane AVA 22D 2 Channel Audio Video Alignment Delay
-40%
UsedBuy It NowBest Offer

Rane AVA 22D 2 Channel Audio Video Alignment Delay

Two Independent Channels (2 In - 2 Out). Parts not included: Software, User Guide, Accessory Cables, Power Adapter. Local pickup is available. Product Condition. Product Information.

$33.59$55.99-40%

You save $22.40

See listingBell Gardens, US
human-i-t
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99.7%Excellent· 40.2k
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Audiopipe EQ709X / Autopipe EQ-709X 7-Band Graphic Equalizer + 9V Line Driver
UsedBuy It NowBest Offer

Audiopipe EQ709X / Autopipe EQ-709X 7-Band Graphic Equalizer + 9V Line Driver

7-band EQ: 50Hz, 125Hz, 315Hz, 750Hz, 2.2KHz, 6KHz, 16KHz. - EQ ON/OFF switch. Transparency Notes - AUX IN / MAIN IN / SUB OUT / FRONT OUT / REAR OUT. This unit was sourced from a mixed wholesale lot and is sold as-is.

$24.99
+$9.99Hollow Rock, US
mattimick
Feedback
100.0%Excellent· 166
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Memphis Audio SBT1 Bluetooth Streaming Device - Used, Open Box
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UsedBuy It Now

Memphis Audio SBT1 Bluetooth Streaming Device - Used, Open Box

The SBT1 Bluetooth streamer is a simple Bluetooth streaming device that allows you to stream Bluetooth to any device. This easy to use unit can stream directly to an amplifier or head unit allowing you to stream music via your Bluetooth device. The SBT1 is ultra compact so it can be used virtually anywhere. Memphis added additional mounting points allowing you to bolt directly through the unit to mount it onto a surface for a secure fit. The SBT1 features exceptional Bluetooth signal range making it an ideal simple solution for all your marine, powersports or car audio needs where you want the ability to stream Bluetooth directly to your audio system from your phone or Bluetooth device.

$37.49
Free ShippingSpringfield, US
creative-car-audioTOP
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99.8%Excellent· 36.5k
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HIFONICS BXIPRO3.0 DIGITAL BASS ENHANCEMENT PROCESSOR
UsedBuy It NowBest Offer

HIFONICS BXIPRO3.0 DIGITAL BASS ENHANCEMENT PROCESSOR

$41.88
Free ShippingLas Vegas, US
eec702
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99.5%Excellent· 9.1k
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High to Low Level Impedance Adapter NEW Pyramid NS-80
UsedBuy It NowBest Offer

High to Low Level Impedance Adapter NEW Pyramid NS-80

The High to Low Level Impedance Adapter Pyramid NS-80 is a bass enhancer designed by PYRAMID, a trusted brand in car audio signal processing. This adapter, manufactured in China, is a reliable and high-quality product that allows for seamless conversion of high impedance signals to low impedance signals, enhancing the bass performance of your car audio system with no modifications needed. The Pyramid NS-80 is a top choice for enhancing your vehicle's audio experience and is a must-have for car audio enthusiasts looking to improve their sound quality.

$30.00
See listingJasper, US
hardwhileworkin
Feedback
95.6%Good· 41
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Sound Xtreme ST-AP6 Digital Bass Machine Processor
UsedBuy It NowBest Offer

Sound Xtreme ST-AP6 Digital Bass Machine Processor

Used once. In box, with bass knob.

$50.00
See listingAurora, US
303madman81kckz
Feedback
100.0%Excellent· 1.1k
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