JBL CONCERT A704 4/3/2 Channels Amplifier RMS: 70W × 4  (4Ω) | 90W × 4 (2Ω)

Upgrade your car audio system with the JBL Concert A704 4-Channel Amplifier, engineered by JBL by Harman to deliver powerful, crystal-clear sound with exceptional reliability. Designed for music enthusiasts who demand premium performance, the Concert A704 provides clean, efficient power for your speakers while maintaining the legendary JBL audio quality.

Whether you're powering a full-range speaker system or bridging channels to drive high-performance components, the Concert A704 offers flexible installation options and consistent output with minimal distortion. Its compact chassis allows easy installation in most vehicles without sacrificing power or efficiency.

Key Features

• 4/3/2 Channel Class AB Amplifier

• RMS Power Output:

  • 70W × 4  (4Ω)

  • 90W × 4  (2Ω)

• High-efficiency design with clean, low-distortion audio

• Bridgeable channels for increased output

• Built-in High-Pass (HPF) and Low-Pass (LPF) crossover filters

• Adjustable input sensitivity for precise system tuning

• High-level and RCA low-level inputs for factory and aftermarket head units

• Premium JBL engineering for accurate, dynamic sound reproduction

• Compact aluminum heat sink for efficient cooling

• Durable construction designed for long-lasting performance

• Ideal for powering coaxial speakers, component speakers, or a combination of speakers and a bridged subwoofer

Technical Specifications

• Amplifier Type: 4/3/2 Channel

• RMS Power @ 4Ω: 70W × 4

• RMS Power @ 2Ω: 90W × 4

• Bridging Support: Yes

• Speaker-Level Inputs: Yes

• RCA Line-Level Inputs: Yes

• Variable High-Pass Filter (HPF): Yes

• Variable Low-Pass Filter (LPF): Yes

• Protection Circuit: Thermal, Overload & Short Circuit Protection

• Cooling: High-efficiency aluminum heat sink

Package Includes

• JBL Concert A704 Amplifier

• User Manual

• Installation Hardware

• Mounting Screws

• Warranty Documentation (where applicable)

Why Choose the JBL Concert A704?

The JBL Concert A704 is designed for drivers who want more than just louder sound—it delivers cleaner highs, richer mids, and tighter bass without sacrificing clarity. Its versatile 4/3/2-channel configuration makes it suitable for a wide range of audio setups, from simple speaker upgrades to more advanced multi-speaker systems. Built with JBL's renowned engineering and premium components, this amplifier offers dependable performance, excellent sound quality, and long-term durability.

Experience the signature JBL sound with the Concert A704—powerful performance, precise tuning, and exceptional audio quality for every drive.