JBL Concert A704 4-Channel Amplifier – 70W RMS x4 Car Audio

JBL Concert A704 4-Channel Car Audio Amplifier
(JBL CONCERTA704)

We Think You Should Know

• 12 Month Australian Warranty
• Purchase Guarantee (see T&C's)
• 70W RMS per channel output
• 1000W peak power delivery
• Adjustable 40–400Hz crossover
• Auto power-on signal detection

Overview

The JBL Concert A704 4-channel car amplifier delivers 70 watts RMS per channel and up to 1000 watts peak power for immersive in-vehicle audio. This Class AB amplifier features adjustable high/low pass crossover from 40 to 400 Hz, letting you fine-tune sound to your speakers and preferences. Smart signal detection powers the amp on automatically when it senses an input signal, eliminating manual switching. Compact at 33.5 x 20.8 x 6.1 cm and weighing 2.9 kg, the A704 has undergone rigorous Harman Kardon testing for reliability in extreme conditions

Key Features:

• 70W RMS per channel – Delivers 280W RMS total across four channels for clean, distortion-free amplification. Drive your speakers with concert-grade clarity and authority.
• 1000W peak power output – Unleash explosive peak power to elevate every beat and bass drop. Dynamic headroom ensures impactful transients and punchy bass response.
• Adjustable 40–400 Hz crossover – Fine-tune your audio with variable high-pass and low-pass crossover settings. Match the amplifier perfectly to your speakers and subwoofer configuration.
• Auto power-on signal detection – Smart circuitry senses the incoming audio signal and powers the amp on instantly. No remote turn-on wire or manual switching required.
• Class AB amplifier design – Combines the sound quality of Class A with the efficiency of Class B. Delivers warm, detailed audio with reduced distortion across the frequency range.
• Harman Kardon durability tested – Rigorously tested for unmatched reliability in extreme conditions. Built to withstand heat, vibration, and demanding automotive environments.
• Compact freestanding chassis – Measuring just 33.5 x 20.8 x 6.1 cm and weighing 2.9 kg, the compact design fits easily in tight spaces. Freestanding mounting allows flexible installation options.

Ideal For

• Car audio enthusiasts upgrading factory sound systems
• Drivers wanting concert-quality audio on the road
• Owners seeking 4-channel amplification for full-range speakers
• Systems requiring adjustable crossover tuning for custom setups
• Installers wanting auto-sensing power-on convenience
• Vehicles where compact amplifier size is a priority

JBL Car Audio

JBL Car Audio products are some of the finest and most innovative products available. With an undeniably rich heritage in audio, JBL have their products in major concert venues and stadiums around the globe and are a go-to choice for music professionals. JBL have perfected their car audio products, so you can enjoy the true clarity and energy of music in your vehicle.

• 1 x JBL Concert A704 4-Channel High-Performance Amplifier
• 1 x Structural Mounting Hardware & Installation Kit
• 1 x Comprehensive Step-by-Step Owner's Layout Manual