Sound & Bass Processors, Equalizers & Crossovers | Sonic Electronix

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Tune your system to perfection with these crossovers, equalizers, and bass drivers. Search this category and improve the sound quality of your sound system.

EQs & Sound Processors

Sound Processors Q & A

For those who want the most out their car audio system, a quality sound processor is a must. After some slight adjustments, your systems will sound like it has been professionally tuned and optimized. Tune your system to perfection with these crossovers, equalizers, and bass drivers. Click here to learn more about digital sound processors and to find out which type would be best for your car audio system.
Bass Restoration & Expanders
Line Drivers
Factory Radio Sound Processors
Other Sound Processors
Digital Sound Processors
In-Dash Sound Processors
Line Out Converters

Top Sellers in EQs & Sound Processors

600W (150W Per Channel) Premium, Super Low Distortion 4-Channel Adjustable Line Output Converter - for Adding Amplifier(s)

• 4-Channel Premium Adjustable Line Output Converter
• 6:1 Step Down With Adjustable Output
• 600w Total Maximum Input (150w Per Channel)
• Super Low Distortion



300W (150W Per Channel) Premium, Super Low Distortion 2-Channel Adjustable Line Output Converter

• 2-Channel Premium Adjustable Line Output Converter
• 3:1 Step Down With Adjustable Output
• 300w Total Maximum Input (150w Per Channel)
• Super Low Distortion



2-Channel Fixed Line Level Converter

• 2-Channel Fixed Line Level Converter
• Designed for Adding Aftermarket Amplifiers to a Factory OEM System
• Standard EIA Color Coded Wires
• 30 Watts Maximum Input
• Gold-Plated RCA Connectors



  • 4.8
4 reviews

2-Channel Speaker Level to RCA Output Converter (High-to-Low Converter)

• 2-Channel High-to-Low Level Converter
• High-to-Low Signal Converter to Connect 2-Channel Amplifiers to Radios Without RCA Output
• Output Voltage: Up to 3V (low-level)
• Mounting: Behind Dash



  • 3.9
9 reviews

L.O.C. PRO Series 2-Channel Line Output Converter with Remote Turn On

• 2-Channel LOC PRO Series
• Remote Turn on Wire
• Single Dial
• Signal-Sensing Circuit
• Surface Mount Construction
• Level Gain Adjustment



  • 4.4
7 reviews

100W Max (50 W Per Channel) Mini 2-Channel Line Output Converter

• Line out converter for adding amplifier to factory radio
• Auto remote turn on
• 6:1 step down with adjustable output
• 100 Watts Max
• 50 Watts max per channel



Variable LOC (Line Out Converter)

• Adjustable Line Output Converter
• Utilize Audio Transformer for Noise Isolation
• Compatible with 2 - 40 watts RMS of Radio Output



Only 2 Left!

  • 5.0
2 reviews

2 Channel Mini 150 Watt LOC With Signal SensingTurn-On

• 2-Channel Input
• Adjustable Gain For Each Channel
• 150W Max Per Channel
• 12V Signal Sense Turn On
• Universal Application



80W 2-Channel Line Output Converter with Digital Noise Filter + Line Driver

• 6:1 Step Down With Adjustable Output
• DC Amplifier Turn On Trigger
• 80w Maximum Input total (40w per channel)



  • 5.0
1 review

Fully-Active Two-Channel Speaker Level to Line Output Converter with Auto Turn-On

• Fully Active, Speaker Level to Line Output Converter with Auto Turn On
•Fully-Regulated Switching MOSFET Power Supply
• Differential-balanced Input Architecture
• 40V RMS Per Channel
•DC-Offset Sensing or Signal Sensing Automatic Turn-On
• Ultra Compact Chassis Design
•Onboard LED Clipping Indicator

VIP Guarantee - FREE 2-Day Shipping,
10% Rewards, Extended Warranty and more!



  • 5.0
1 review

2-Channel Line Out Converter with xBOOST Technology and Includes Remote Bass Knob (3-year warranty)

• 2-channel line out converter
• Speaker Level Input Accepts Up To 400 Watts RMS
• Bass Enhancer And Bass Compensation
• xBOOST Technology
• Selectable Auto On
• 9.5 Volt Pre-Out
• 12 Volt Trigger Out



  • 5.0
3 reviews

4 Band Graphic Equalizer, With Subwoofer Crossover, Input gain control, Master Volume control

Front, Rear And Subwoofer Outputs • Fader Control • Subwoofer Volume Control • Subwoofer Frequency 30Hz to 250Hz Variable • Dual Color Illumination (Red, Green)



  • 4.3
6 reviews

4-Channel Line Output Converter (From Speaker Level To RCA Line Level)

• 4-Channel Line Output Converter
• Connects the speaker level to RCA line level
• Perfect for connecting a factory stereo to an aftermarket amplifier
• Gold plated RCA connections



7-Band Graphic Equalizer with Front 3.5mm Auxiliary Input, Rear RCA Auxiliary Input and High Level Speaker Inputs

• Dual Auxiliary Inputs
• Master & Subwoofer Volume Control
• Gold-Plated Contacts
• Blue Illumination
• 7V Preamp Outputs



Line Out Converter for Adding an Amplifier to a Factory Radio

• Converts 10 to 30 watts per channel with a fixed 10:1 conversion
• Great for getting an additional set of pre-amps outputs from a head unit equipped with only one set



9-Band Graphic Equalizer w/ 18db Boost and Cut

• 9-Band Graphic Equalizer
• White Illumination
• Independent Fader Control
• Master and Sub Gain Controls
• Max Output Voltage: 8V



2 Channel Line Out Converter with AccuBASS

• Two Channels of Active Speaker Level Inputs
• AccuBASS Processing
• 9.5 Volt Pre-Amp Outs
• GTO - Signal Sensing Inputs

Add the Remote Subwoofer Control and Save 20%



  • 5.0
5 reviews

L.O.C. PRO Series 2-Channel Line Output Converter

• 2-Channel LOC PRO Series
• 33% Smaller Size Gives More Room For Vital Components
• 55 Watts Per Channel
• Speaker Level Input to RCA Level Output
• Single Dial



  • 5.0
3 reviews

Concert Series 2-Channel 24dB-Gain Line Driver, 5 Year Warranty*!

• Concert Series Overdrive Line Driver
• High Voltage Level
• Balanced Inputs
• Low Impedance Output
• Top-Mounted Controls
• Power Supply Ground is Switchable
• Preamp Inputs and Outputs

50% Off RCA Interconnect Cables with Purchase!



  • 4.6
5 reviews

2 Channel Line Driver/Line Output Converter

• 2 Channel Line Output Converter
• Excellent signal to noise ratios
• High level/low level input
• Aux input
• Adjustable gain output



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EQs & Sound Processors Information

Information about Digital Sound Processors: Most original factory stereos use preset equalization curves that are designed to get the most out of your car's factory speakers. When you upgrade to aftermarket speakers, your OEM stereo's equalizer preset curves do not adjust, resulting in under performance from your aftermarket speakers. Processors reshape the output of your factory stereo's preset equalization curves to ensure you get optimal performance out of your aftermarket amplifiers and speakers. A parametric sound equalizer helps you tune your system to the perfect balance. These audio equalizers will also help eliminate infrasonic distortions for a crisper and clearer audio output. Adding a sound equalizer to your car will optimize your system's performance. Electronic crossovers divide your music into high, low and midrange frequency ranges. Some of the units we carry are combinations of both stereo crossovers and stereo equalizers. Call us today if you need help choosing the right combo for your setup and budget. Bass reconstructors, or bass enhancers, improve low frequency reproduction in a car audio system with at least one subwoofer. These bass expander products will help your subs produce accurate bass thumps.