Audison LR604XR car audio amplifier

Posted on Aug 23, 2012

If the amp is built on bipolar transistors, and the preamp/crossover on FETs, then they were designed by different guys, right? Not this amp. Here, a strong, experienced designer`s hand is evident from schematic to parts layout, PCB routing and general assembly. Which leads to one of the lowest failure rates (don`t quote me on this although it`s common knowledge in repair industry) and a surprisingly good sound from a $50 per channel device. A unit worth a Web page. LR series - Audison`s junior - was formally discontinued in 1999, just to be repackaged under `Millenium` series name.

Audison LR604XR car audio amplifier
Click here to download the full size of the above Circuit.

Narrow heat sink dictates board shape. Quite logically, power supply and power output are on one side, RCA inputs and XO switches on the other. Which also means that acoustic output traces run directly under DCDC transformer. Anyway, the form factor doesn

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