AXT Systems

HPM-2 Headphone Amplifier
HPM-2 Module Top View
HPM-2 Moule Bottom View
The HPM-2 module is a smaller, surface mount version of the HPM-1. It is a stereo headphone amplifier with integrated volume control. It uses NE5532 devices for buffering and the JRC NJM4556A as the headphone driver, capable of driving 10.5V into a 150 ohm load.
The module is powered with a bipolar supply (+/-12 to +/-16V) using a power supply such as the PSU-12. The module measures 50mm x 60mm. Several of these were used together in an enclosure for a studio headphone amplifier system.