Garage
Shop

Hifonics Maxxsonics MX-4

Add-A-Sub High-to-Low Level Converter for OEM Integration

Hifonics
Shop all Hifonics
highlight-star-icon

Add-A-Sub High-to-Low Level Converter for OEM Integration • Perfect for Adding a Subwoofer to a Factory System • Converts and Filters High-Level Inputs into RCA Outputs

Learn more about the mx4

We apologize

This item has been discontinued

Description


Hifonics brand icon

Authorized dealer

Product Features:
  • Add-A-Sub High-to-Low Level Converter for OEM Integration
  • The ideal way to add a subwoofer to a factory audio system
  • Small box for easy installation
  • Converts and filters high-level factory speaker wires into ultra-clean low-level RCA signals to an aftermarket amplifier
  • High Level Inputs: Accepts all types of high-level input signals including floating ground type, low and high voltage speaker wires
  • OEM high-level input voltages are adjustable from 4 volts to 40 volts
  • Unbalanced line outputs are adjustable to the aftermarket amplifier from 4 volts to 9 volts
  • 1-year Manufacturer's warranty
Product Specifications:
  • High Level LR and RR Input Control: 4-40 volts
  • Subwoofer Output Level: 4-9V
  • Dimensions: 5-1/4L x 4-1/8W x 1-1/2H

Best selling similar products

XEQ7 small

NVX XEQ7

• 7 band-Band Graphic Equalizer
• 3 Sets of preamp outputs (front, rear and subwoofer)
• 7 volts Max preamp outputs
• Subwoofer frequency and level control
• Gold-plated RCA level inputs

(51)

$49.99

List price $89.99

EQX7PRO small

DS18 EQX7PRO

• 7 band-Band Graphic Equalizer
• 3 Sets of preamp outputs (front, rear, and subwoofer)
• 8 volts Max preamp outputs
• Subwoofer frequency and level control
• Gold-plated RCA level inputs

$119.95

List price $143.99

EQ-4000BT v2 small

Earthquake Sound EQ-4000BT v2

• 4 band-Band Parametric Equalizer
• 3 sets of preamp outputs (front, rear and subwoofer)
• 9 volts max preamp outputs
• Subwoofer frequency and level control
• Gold-plated RCA level inputs

$179.99

List price $199.99

ACX-3.2 small

AudioControl ACX-3.2

• 4 band-Band Graphic Equalizer
• 3 setsof preamp outputs (front, rear and subwoofer)
• 9.5 volts max preamp outputs
• Subwoofer frequency and level control

$529.00

List price $709.00

eqx5 small

DS18 EQX5

• 5 band-Band Graphic Equalizer
• 3 Sets of preamp outputs (front, rear and subwoofer)
• 8 volts Max preamp outputs
• Subwoofer frequency and level control
• Gold-plated RCA level inputs

(1)

$65.95

List price $65.95

EQP850 small

Cerwin-Vega EQP850

• 5-Band Parametric Equalizer
• 3 sets of preamp outputs (front, rear and subwoofer)
• 9 volts max preamp outputs
• Subwoofer frequency and level control
• Nickel-plated RCA level inputs

$139.99

List price $139.99

EQ780 small

Cerwin-Vega EQ780

• 7-Band Parametric Equalizer
• 3 sets of preamp outputs (front, rear and subwoofer)
• 7 volts max preamp outputs
• Subwoofer frequency and level control
• Nickel-plated RCA level inputs

$109.99

List price $109.99

EQ-770 small

Cerwin-Vega EQ-770

• 7 band-Band Parametric Equalizer
• 3 sets of preamp outputs (front, rear and subwoofer)
• 7 volts max preamp outputs
• Subwoofer frequency and level control

(2)

$99.99

List price $115.99

CREQ7B small

Crunch CREQ7B

• 7 band-Band Parametric Equalizer
• 3 Sets of preamp outputs (front, rear and subwoofer)
• 9 volts Max preamp outputs
• Subwoofer frequency and level control
• Gold-plated RCA level inputs

$69.99

List price $99.99

EQX7 small

DS18 EQX7

• 7 band-Band Graphic Equalizer
• 3 Sets of preamp outputs (front, rear and subwoofer)
• 8 volts Max preamp outputs
• Subwoofer frequency and level control
• Gold-plated RCA level inputs

$95.95

List price $95.95

Specifications & Details


Line Out Convertor Specifications
Number of Channels
1 - Mono
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

MX-4

Weight:

1.50lbs

Internal SKU:

mx4

Internal Product ID:

18563

Customer Ratings & Reviews


Hifonics Maxxsonics MX-4 thumbnail image

5 star
50%
4 star
50%
3 star
0%
2 star
0%
1 star
0%



Durability
4.5
Value
4
Features
5
Design
5
Usability
4.5

Customer Reviews

Sort by:

Loading...

Amazing product

This product is awesome for the person that wants to keep the stock lock of their vehicle but add a little bass. No need for a new head unit and install kits. hook this to your current speaker wire and you are all set. Very easy to install

By Josh on May 20, 2011

7 found this helpful


good product.

I used this product on a budget build in an '05 Xterra. The truck has a 6 disk Rockford OEM radio so this product work well for the application. A little on the pricey side, but a good product none the less. I would recommend this product.

By Nathan on March 20, 2012

4 found this helpful


Related Searches


Save up to 10 different vehicles in your garage

Add vehicle
Loading...
Identify your vehicle and submodel details
  • Owner's manual
  • Vehicle's insurance card
  • Vehicle registration
  • Vehicle produced after 2005: Inside driver's side door
  • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
Car Info Side Door Icon
Vehicle Registration Icon
Vehicle Insurance Icon

Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

  • You see only parts engineered for your exact vehicle
  • You avoid incompatible radios, speakers, or wiring
  • Installation is smoother, faster, and frustration-free
  • You get the correct accessories the first time

Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.