The LD Systems HPA 4 is a 4-channel headphone amplifier with high-power output for use in stage, studio, and home recording applications. It is an ideal solution for wired in-ear monitoring, and the compact design is ergonomically shaped. The HPA 4 is housed in a rugged steel-plate enclosure, while the external 24V power adapter provides ample headroom to offer 100 mW output per channel with no distortion.
The rear panel offers a stereo RCA input plus a single 1/4" TRS headphone input, which are linked, while the stereo/mono switch provides a choice of how you'd like to monitor the signal. The front panel has four 1/4" headphone outputs and a green LED power indicator. The top of the unit features four rotary knobs for adjusting the level of each headphone output.
- 4-channels
- 4 x 100 mW output power
- No distortion
- Rugged steel-plate housing
- Stereo RCA and 1/4" jack inputs
- Stereo/Mono switchable
- 24V power adapter included