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740 Watts Class D 4-Channel Amp with Bluetooth App Control – JA4B
$149.99
Check Price at Authorized Dealer
- Jensen 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
![YouTube video](https://i.ytimg.com/vi/Bnnq5BAisco/hqdefault.jpg)
![90 year badge](https://jensenmobile.com/wp-content/uploads/2023/01/90-year-badge.jpg)
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](https://jensenmobile.com/wp-content/uploads/2023/01/Amp-App-Control.jpg)
App Control
Easy Access
Say goodbye to crawling in the trunk to adjust your amp. The new amp 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](https://jensenmobile.com/wp-content/uploads/2023/01/JA1B_illumination-1024x576.jpg)
![ja4b amplifier with app](https://jensenmobile.com/wp-content/uploads/2023/02/JA4B_with-app_1000x1000-300x200.jpg)
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](https://jensenmobile.com/wp-content/uploads/2023/02/JA4B_side-a_1000x1000-copy-300x127.jpg)
![specialized amp technology](https://jensenmobile.com/wp-content/uploads/2023/01/specialized-amp-technology.jpg)
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](https://jensenmobile.com/wp-content/uploads/2023/01/CTA-12V-Amplified-Power.jpg)
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 |
Power Information
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
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
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