LD Systems HPA1
The LD Systems HPA1 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 number: LDHPA1
Product type: Headphone Amp:
Inputs: 2, AUX In (Stereo)
Input connectors: XLR-F (L + R Input, balanced), 3.5 mm stereo jack (AUX In)
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
Controls: Power / Volume, Stereo/Mono (Focus) switch, Balance L/R
Indicators: Peak (Amber), Power LED (Power ON: green), Signal (green), 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
Dimensions: 80 x 42.5 x 133mm