LD Systems HPA 1

The LD Systems HPA 1 is a versatile headphone amplifier with high power output for stage, studio and home recording, and is the perfect solution for wired in-ear-monitoring. The compact device in a rugged, ergonomically shaped plastic housing. The soft-touch surface and practical belt clip is very extensively equipped.

In addition to locking XLR connectors for the stereo signal L/R input, the HPA 1 has a balanced 3.5 mm stereo jack as AUX input, which can be used in parallel for clicks or playback. It is protected for safe operation against excessive input levels; a hollow pin socket with negative internal contact enables the connection of a network adapter for fixed operation.

A 3.5 mm stereo jack is provided as earphone and headphone output. Volume level and balance can be set with easy-grip knobs, a push-button switches between the summed mono and stereo signals. A full-fledged limiter is integrated for distortion-free playback as well as added protection against feedback.

The LD Systems HPA 1 has bi-colour LEDs to facilitate the features overview, which displays the response of the limiter during peaks and the battery status. At 165 grams, the headphone amplifier is distinctly light-weight and can be operated for up to 12 hours thanks to a high quality 9 V block battery.

Specifications

• Product number: LDHPA1

• Product type: Headphone Amp:

• Inputs: 2, AUX In (Stereo)

• Input connectors: 3.5 mm stereo jack (AUX In), XLR-F (L + R Input, balanced)

• Input impedance: 10000 (3.5 mm jack)Ohm(s), 6000 (XLR In)Ohm(s)

• Input sensitivity: -6 (3.5 mm jack) dBV, 3 (XLR In)dBu

• Max. input level:  7 (3.5 mm jack) dBV, 16 (XLR In)dBu

• Protection circuits:  Max. Input leveling, Power OFF - Mute relay, Audio Limiter

• Headphones ouputs: 1

• Headphones outputs: 3.5 mm TRS

• Power Output (1% THD @ 33 Ohm Load): 2 x 1,65 Vrms

• Minimum connected impedance: 16 (per channel)Ohm(s)

• Frequency response:  20 - 40000Hz

• THD: 0.04%

• Controls:  Stereo/Mono (Focus) switch, Power / Volume, Balance L/R

• Indicators:  Power LED (Power ON: green), Signal (green), Peak (Amber), Battery (low battery: red)

• Operating voltage: 9 V block, 9 V DC power supply, 9 V DC

• Current draw: Nom. 0.07 A / Max. 0.15A

• Cabinet material: plastic

• Cabinet surface: Soft-touch

• Cabinet colour: Black

• Width: 80mm

• Height: 42.5mm

• Depth: 133mm

• Weight: 0,155kg

• Accessories (included): belt clip