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



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)



  • 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



  • 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



Four Channel Adjustable Line Output Converter for Adding an Amplifier to a Factory Radio

• 4-Channel Speaker Level Converter
• Accepts 80 watts per channel
• Can be used as a line-out converter
• Can interface with JBL/Premium Sound/BOSE audio systems
• Common ground adaptor



2 Channel Line Out Converter with AccuBASS & 5-year warranty*!

• 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%



160W, 4-Channel Line Output Converter with Digital Noise Filter + Line Driver

• 3:1 Step Down With Adjustable Output
• DC Amplifier Turn On Trigger
• 160w Maximum Input Total (40w Per Channel)



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



  • 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



2-Channel K-Series Speaker Wire to RCA Line Out Converter (LOC)

• Speaker Cable to RCA Adapter
• 2-Channel K-Series
• Line Out Converter
• K Grip Connectors w/ Split Pin RCA
• Silver Tinned OFC Wire

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10% Rewards, Extended Warranty and more!



4-Band Pre-Amp Graphic Equalizer with Gold Plated RCA Inputs and Outputs

• 4-Band Graphic Equalizer
• Subwoofer Output
• Dual-Color Selectable Illumination
• Gold-Plated RCA Inputs and Outputs
• Bass Boost (0 - 18 dB)
• Signal to Noise Ratio: 105 dB



  • 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



  • 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!



Only 2 Left!

  • 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



  • 2.0
2 reviews

3-Way Electronic Crossover

• 3-Way Electronic Crossover, Remote Subwoofer Level Control • Front, Rear And Sub Inputs • Selectable Crossover Frequencies



  • 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



  • 4.5
6 reviews

7-Band Parametric Equalizer with Subwoofer Electronic Crossover

7 Band Parametric Equalizer • Isolated PWM Power Supply • 8 Volts RMS Output • Subwoofer Outputs • Level Controls • Subwoofer Frequency Selection • 20dB Headroom • Gold-Plated RCA Input And Output Connectors



  • 4.8
8 reviews

2-Channel Adjustable Differential Line-Out Converter with Amp Turn On

• 2-Channel Differential Converter with Amp Turn On
• Compact Outer Case
• ABS Plastic and Aluminum Materials
• Allows Install of Line Level Inputs to OEM System
• EIA Color Coded Inputs
• Adjustable Outputs



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



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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.