Jensen 740W Class D 4-Channel Amp with Bluetooth App JA4B
Description
Description
The Jensen JA4B Class D 4-Channel Amplifier combines modern audio engineering with wireless smartphone control to deliver powerful, clear sound in a compact footprint. With up to 740 Watts of dynamic power and CTA-2006-D certification, this high-efficiency amplifier easily drives full-range speakers or subwoofers while conserving valuable vehicle space.
Equipped with Bluetooth app functionality for Apple and Android, you can effortlessly tune EQ presets, adjust frequency and gain settings, and customize the integrated RGB illumination directly from your phone. Flexible high- and low-level inputs, variable crossovers, and built-in thermal DC offset safety protection ensure seamless system integration and reliable performance.
Key Features
| Brand | Jensen |
| Model | JA4B |
| Amplifier Class | Class D Digital |
| Number of Channels | 4 |
| Total Dynamic Power | 740 Watts |
| RMS Power Output (4 Ohms) | 90W RMS x 4 |
| RMS Power Output (2 Ohms) | 115W RMS x 4 |
| RMS Power Output (4 Ohms Bridged) | 230W RMS x 2 |
| Audio Inputs | High Level (Speaker Wire), Low Level (RCA) |
| Audio Outputs | RCA Pass Through |
| App Control | Yes (iOS / Android) |
| Illumination | Customizable RGB |
| Crossover | Adjustable High and Low-Pass (32 Hz – 320 Hz) |
| Bass Boost | Adjustable at 45 Hz |
| Frequency Response | 20 Hz – 20 kHz |
| Signal to Noise Ratio | 70 dBA |
| Gain Adjustment | Variable 200 mV – 6 V |
| Power Supply | PWM MOSFET |
| Fuse Rating | 25A x 2 |
| Recommended Power/Ground Wire | 4 – 8 AWG |
| Recommended Speaker Wire | 12 – 16 AWG |
| Dimensions (H x W x D) | 5.5 cm x 21.3 cm x 14.2 cm |
| Certification | CTA-2006-D Certified |
Highlights
- High-efficiency Class D design producing up to 740 Watts total dynamic power
- Wireless Bluetooth control via the Jensen AMP app for iOS and Android devices
- Customizable RGB illumination with an easy-to-use color wheel
- CTA-2006-D certified for verified and trusted power output
- Flexible configuration with variable high-pass and low-pass crossovers plus 45 Hz bass boost
- Integrated thermal DC offset short circuit protection
Videos
Compatibility
Compatible with standard 12V automotive electrical systems. Accepts both high-level factory speaker outputs and aftermarket low-level RCA inputs for seamless integration across a wide range of vehicle audio setups.
Warranty
4-year limited warranty when registered within 60 days of purchase.
Downloads
Frequently asked questions
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