LD Systems HPA 1 Amplifier for Headphones and Wired IEM

LD Systems HPA 1 Amplifier for Headphones and Wired IEM

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.

Key Features

• 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

Technical Specifications

Inputs
2
Inputs
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
Audio Limiter, Max. Input leveling, Power OFF - Mute relay
Headphones outputs
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 - 40000 Hz
Total Harmonic Distortion (THD)
0.04%
Controls
Balance L/R, Power / Volume, Stereo/Mono (Focus) switch
Indicators
Battery (low battery: red), Peak (Amber), Power LED (Power ON: green), Signal (green)
Operating voltage
9 V block, 9 V DC power supply
Operating voltage
9 V DC
Max. Current
Nom. 0.07 A / Max. 0.15
Cabinet material
Plastic
Cabinet surface
Soft-touch
Cabinet Color
Black
Width
80 mm
Height
42.5 mm
Depth
133 mm
Weight
0,155 kg
Accessories (included)
Belt clip