JBL Concert A704 4-channel headstage 280 W Compatible with: Universal

Ultimate Auto-Sound by JBL.
The Concert Power Amplifiers of Class AB are available as 2-channel and 4-channel models. The amplifiers offer excellent and mature functions at an attractive price. Both the models have a compact and elegant format and are equipped with an adjustable high/low pass frequency point and an automatic switch-on function. And WAS more importantly, they deliver a reliable performance. The 2-channel amplifier supplies 65 watts RMS at highly detailed music output. If you only want to amplify the basses, you can bridge the 2 channels to 170 watt RMS. 4-channel models each send 70 watt RMS to your front and rear loudspeakers, the bridged model can supply a pair of subwoofers with up to 180 watt RMS each.

Powerful class amplifier
The amplifier output of the class AB combines the advantages of the amplifier of the class A with those of the class B and at the same time minimizes the associated problems of the low degree of efficiency and the distortion.

Adjustable high/low pass frequency crossover
Concert Series amplifiers have a High Pass Filter (HPF) and Low Pass Filter (LPF), which lets you set the frequency from 40 Hz to 400 Hz, depending on your individual music taste, which music frequencies are delivered to your speakers.

Automatic switch-on
When using the high-level signal inputs the amplifier switches on automatically as soon as a direct current is detected (greater than 2.5 Volt). When using the line level signal inputs, the amplifier also switches on as soon as a +12-V signal is detected by the remote power cable.

Efficient cooling design
High-performance amplifiers that are not only powerful but also compact depend on a fully efficient cooling design.

Concert sound and elegant look
JBL concert amplifiers offer an extraordinary sound experience with elegant industrial design.

Reliable performance
For high sound quality and reliable performance, high-quality components such as audio capacitors and power MOSFETs have been selected for the Concert amplifiers. These amplifiers also have to go through a rigorous testing process that would destroy unstable amplifiers. JBL exposes them to deep cold, great heat and vibrations, radiates them with UV light and allows them to run at full power for days.

This text is machine translated.