shop header graphic
shop header graphic
shop header graphic

New
ja4b
ja4b amplifier angle b
ja4b amplifier side a
ja4b amplifier side b
ja4b amplifier side c
ja4b amplifier with app
ja4b amplifier angle a
ja4b
ja4b amplifier angle b
ja4b amplifier side a
ja4b amplifier side b
ja4b amplifier side c
ja4b amplifier with app
ja4b amplifier angle a

740 Watts Class D 4-Channel Amp with Bluetooth App Control – JA4B

$149.99

Out of stock

Check Price at Authorized Dealer

  • Jensen DSP AMP App (Apple®/Android™)
  • RGB Custom Color Illumination
  • Class D Design
  • High Level (Speaker Wire) Input
  • Low Level (RCA) Inputs
  • Dimensions: 2.16″ X 8.38″ X 5.59″ (HXWXD)
  • Adjustable Bass Boost At 45 HZ
  • CTA-2006-D Certified

 

*Upgrade to 5-year Warranty by Registering Your Professionally Installed Item.
60 day return icon
free shipping icon
SKU: JA4B Category:

YouTube video

90 year badge

Jensen Amp Series
The new Jensen JA series amplifiers leverage 90+ years of audio excellence combined with modern smartphone technology to deliver the high-quality sound you require with the convenience and usability you seek.

control amp from your smart phone

App Control

Easy Access

Say goodbye to crawling in the trunk to adjust your amp. The new DSP app allows you to dial in your amp’s settings from a smartphone anywhere or near the car. You don’t listen to music in the trunk, why tune your audio from back there?

Adjustment Options

Adjustment options are perfect for the seasoned audiophile and those new to the hobby. Take advantage of the built in EQ presets for great sound right out of the box or try your hand at custom tuning with detailed frequency, volume, and gain controls.

More than audio

In addition to customizing the audio options, the app also lets you choose RGB illumination options. Match the amp colors to your car interior or change colors on the fly to match your mood. The easy-to-see color wheel makes it simple to choose the prefect shade.

ja1b_purple-illumination
ja4b amplifier with app

Built Without Compromise Small Size, Big Sound The Class-D amplifier design provides nearly double the efficiency of analog class AB amplifiers in a much smaller footprint. This lets you install them in very small spaces and to leaves trunk space for that road trip cooler or suitcase.

Dimensions: JA4B : 2.16″ h x 8.38″ w x 5.59″ d

Intuitive Side Panel Design

Clear labels make it easy to understand all side panel inputs, outputs, and connections for a faster installation.

ja4b amplifier side a
specialized amp technology

Micro Circuitry

Modern micro circuitry enables the amplifiers to provide powerful sound in a super-small footprint.

Real Power, Trusted

The Jensen JA amplifiers are the first amps on the market to have third-party tested and approval to meet the updated CTA-2006-D specifications.

cta 12v amplified power

Speaker Outputs

Mono
Class

D Digital
Speaker Inputs

High level (Speaker Wire), Low Level (RCA)
Illumination

RGB
App Control

Yes
Crossover

Adjustable High and Low-Pass Crossovers (32-320 Hz)
Frequency Response

20 Hz – 20kHz
Signal to Noise Ratio

70dBA
Total Dynamic Power

740 Watts
Outputs

RCA Pass Through
Gain Adjustment

Variable 200 mV ~ 6 V
Adjustable Bass Boost

45 Hz
Power Supply

PWM MOSFET
Fuse Size and Type

25A x 2
Dimensions

2.16″ X 8.38″ X 5.59″ (HXWXD)
Recommended Power/Ground Wire

4-8 AWG
Recommended Speaker Wire

12 – 16 AWG

Specifications

CLASS D EFFICIENT DESIGN – produces 365 Watts of maximum dynamic power x 2 channels @ 4 ohms Bridged, 185 Watts of maximum dynamic power x 4 channels @ 2 ohms and 125 Watts of maximum dynamic power x 4 channels @ 4 ohms

RGB ILLUMINATION VIA BLUETOOTH APP – the Jensen DSP app allows you to have full control over your amplifiers various functions such as: Illumination, Remote Bass, Frequency, Volume & Gain

FULL RANGE CROSSOVERS & BASS BOOST – When constructing your Jensen 4-channel amplifier, we added high-pass and low-pass variable crossovers for versatility and use of full range speakers or subwoofer plus a variable bass boost at 45Hz

SHORT CIRCUIT PROTECTION – given the vast amounts of dynamic power in your mono amplifier we built-in a thermal DC offset safety protection

 

Specifications:

  • Jensen DSP Amp app (Apple®/Android™) to control illumination and system set-up via Bluetooth®
    (Free App required for system set-up)
  • RGB Custom color illumination via Bluetooth app control
  • Class D design
  • Amplifier dimensions: 2.16″ x 8.38″ x 5.59″ (HxWxD)
  • Inputs / Outputs:
    • High level (speaker wire)
    • Low level (RCA)
    • RCA Pass-thru outputs

Continuous Power Output :

  • 90W RMS x 4 Channels at 4 ohm
  • 115W RMS x 4 Channels at 2 ohm
  • 230W RMS x 2 Channels a 4 ohm Bridged (1% THD+N)

Dynamic Power :

  • 100W x 4 Channels at 1kHz at 4 ohm
  • 125W x 4 Channels at 1kHz at 2 ohm
  • 255W x 2 Channels at 1kHz at 4 ohm Bridged (1% THD+N)

Maximum Dynamic Power :

  • 125W x 4 Channels at 1kHz at 4 ohm
  • 185W x 4 Channels at 1kHz at 2 ohm
  • 365W x 2 Channels at 1kHz at 4 ohm Bridged (10% THD+N)

Features:

    • Frequency response: 20 Hz ~ 20 Hz
    • Signal to noise ratio 70 dBA
    • Adjustable bass boost at 45 Hz
    • 5-Band EQ
    • Gain adjustment: 200 mV ~ 6 V
    • Adjustable high-pass and low-pass x-overs: 32 Hz – 320 Hz
    • Power/Ground terminals connector: 4 – 8 AWG
    • Speaker terminal connector: 12 – 16 AWG
    • Fuse size: 25 A x 2

Documents

Manuals & More

JA4B


Click Here to Read Warning for California Residents