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Massive Audio EQ 4P

4-Band In-Dash Parametric Equalizer w/ 8V Line Driver & Aux Input


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Massive Audio EQ 4P

4-Band In-Dash Parametric Equalizer w/ 8V Line Driver & Aux Input


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NVX XWS1625 25 ft. of 16 Gauge Speaker Cable/Wire

25 ft. of True Spec 16 Gauge EnvyFlex Speaker Cable/Wire (100% Oxygen-Free Copper)



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  • 1/2 DIN, 4 Band Parametric Equalizer
  • Correct peaks and dips in sound characteristics
  • Frequency bandwidth control for each band (20Hz - 20,000Hz)
  • 8V/20dB headroom line driver
  • Auxiliary inputs
  • Parametric equalization (Sub, Mid, High, Low)
  • Sub and fader control
  • 6-Channel, 7 volt RCA outputs (front/rear/subwoofer)
  • Adjustable center frequency for each band
  • Adjustable master volume level control
  • Adjustable subwoofer level control
  • 2-Channel RCA AUX input with adjustable gain
  • Gold plated terminals
  • 30V Bi-FET op-amp power supply
  • Dimensions: 4"L x 7"W x 1"H
  • 1-year warranty

Equalizer Specifications

Type of Equalizer
This determines the way the equalizer processes the signal from the source unit. A parametric equalizer allows to you adjust the center point of the frequency band you are adjusting as well the bandwidth which can be narrowed or widened. A graphic equalizer has fixed frequency bands and bandwidth and only the frequency bands can be adjusted. A digital equalizer uses a software program to tune your system.
A graphic equalizer typically has more adjustable bands and is less expensive, whereas a parametric will have fewer bands but offer a greater level of control and provide more tuning options. Digital equalizers will tune your system with the most detail and precision but require a computer and are typically a little higher in price.
Equalizer Bands
The number of graphic or parametric equalizer bands the receiver has. The better the EQ, the more likely you will be able to "tweak" your sounds to your desire.
4 band
Equalizer Frequencies
The frequency range that allows control of the center frequency of each equalization band.
20 - 20,000 Hz
Built-in Bass Reconstruction
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.
Line Driver
A line driver is a small amplifier used to support the strength of the audio signal coming from the source unit.
Speaker Level Inputs
Speaker level inputs are commonly referred to as high-level inputs and vice versa. This input type allows you to get your audio signal directly from the speaker wire in your vehicle, instead of using RCA cables. The advantage of this is factory integration, as most stock radios do not have RCA outputs to run amplifiers.
Total Number of Inputs
This is the total number of input connections that go into the unit.
Total Number of Outputs
This is the total number of output connections that the unit will produce.
Button Color
Refers to the color of the physical buttons on the unit.
Max Output Level
The maximum level (in volts) of signal output. A higher level will increase the clarity and boost your signal.
8 volts
Frequency Response
The range of frequencies the speaker will reproduce (lowest frequency to the highest). Bigger is better, meaning the wider the range, the better. The optimal range is 20 - 20,000 Hz (which is the range of human hearing).
20 - 20,000 Hz
The width of the item from left to right (side-to-side) measured in inches.
The height of the item, measured from top to bottom, in inches.
The front-to-rear depth of the item, in inches. If the item is angled or slanted, this value is the bottom measurement.

Specials with this Item

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Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
4 Star
3 Star
2 Star
1 Star

Average Attribution Rating


Marrero, LA


January 3, 2012

This truly is an awesome equalizer. Install only took twenty minutes. My highs and mids play so much clearer and my adjusting the bass is so much funner. Never realized how much bass from rock I was missing until I got this equalizer. Also a plus that it lights up. Easier to adjust at night without having to turn on the lights. Would definitely recommend this for someone that is looking for a simple equalizer for a reasonable price.

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verry great value

November 12, 2011

I think it's a great product. I had one once and I would like to have one again. Thanks

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Accessory Tools and Products

Accessories added

NVX XWS1625 25 ft. of 16 Gauge Speaker Cable/Wire

25 ft. of True Spec 16 Gauge EnvyFlex Speaker Cable/Wire (100% Oxygen-Free Copper)

Your Price $15.99

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Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Massive Audio EQ 4P

  • Dalek Massive @ Massive Audio Booth | CES 2014
  • What is an Equalizer (EQ) and How Does a Parametirc vs Graphic EQ Work?