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LD Systems | HPA1 | Personal Headphone Amplifier

Original price $199.00 - Original price $199.00
Original price $199.00
$199.00 - $199.00
Current price $199.00

or 4x fortnight payments of $49.75 AUD with

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 with 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 and as 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.


  • Compact and powerful headphone amplifier
  • Also ideal for wired in-ear monitoring
  • Balanced XLR inputs L/R
  • 3.5 mm AUX input for click and playback
  • Precise volume and balance controllers
  • Built-in limiter for distortion-free playback and feedback protection
  • Switchable mono sum for a focused sound
  • Ultra stable housing with soft-touch surface
  • Practical belt clip for direct on-body operation
  • Connection for a 9 V DC adapter


Product type: Headphone Amp
Inputs: 2, AUX In (Stereo)
Input connectors: XLR-F (L + R Input, balanced), 3.5 mm stereo jack (AUX In)
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: Audio Limiter, Max. Input leveling, Power OFF – Mute relay
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: Balance L/R, Power / Volume, Stereo/Mono (Focus) switch
Indicators: Power LED (Power ON: green), Signal (green), Battery (low battery: red), Peak (Amber)
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: 80 x 42.5 x 133 mm
Weight: 0.155kg