Intuitive design and convincing quality distinguish the HPA 1 headphone amplifier from LD Systems. Even before testing, you can enjoy the low weight of just 165 grams. Especially during longer sessions the carrying of the amplifier is not annoying or distracting. At the same time, however, the plastic housing of the HPA 1 is robust enough to withstand daily use. It doesn't matter if you have it with you on stage thanks to the practical belt holder or if you sit in the studio and make recordings.
For connection there are 2 locking XLR inputs for the left and right channel as well as an Aux-In on the lower side. The aux's 3.5 mm stereo input allows parallel use for click or playback tracks. It is also protected against excessive input levels, ensuring safe operation. The hollow pin socket with negative internal contact is also located on the underside, allowing the user to connect a mains adapter and thus to operate it permanently.
On the top side there is a 3.5 mm stereo jack socket for the headphones with the corresponding volume control, a balance control for the panorama and a button for stereo or mono use. The two differently colored LEDs show the response of the full-fledged limiter at level peaks and the battery level. The limiter ensures distortion-free playback and protection against feedback.
Last but not least it should be mentioned that with a high quality 9V Block up to 12 hours operating time are possible, so that even longer performances or studio visits are no problem.