LD Systems HPA 1 Headphones Amplifier

About: LD Systems HPA 1 Headphones Amplifier

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.

• 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

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.

Specifications

• Product Type - headphone amplifier
• Type - 1-channel stereo
• Inputs - Main Input (Stereo), 1 x Aux In (Stereo)
• Input Connections
  • XLR-F (L + R Input, balanced),
  • 3.5 mm stereo jack (Aux In)
• Input Impedance - 6 kOhm (XLR In), 10 kOhm (3.5 mm jack)
• Input Sensitivity - 3dBu (XLR In), -6 dBV (3.5 mm jack)
• Max. Input Level - 16 dBu (XLR In), 7 dBV (3.5 mm jack)
• Protection Circuits - Audio Limiter, Max. Input leveling, Power-OFF Mute-Relay
• Headphone Outputs - 1
• Headphone Output Connectors - 3.5 mm stereo jack
• Power Output - 2 x 1.65 Vrms / 1% THD @ 33 Ohm Load
• Minimal Connected Impedance per Channel - 16 ohms
• Frequency Response - 20 Hz - 40,000 Hz
• THD @ 1 kHz Sinus - 0.04%
• Controls
  • Power/Volume
  • Balance L/R
  • Stereo/Mono (Focus) -switch
• Indicators - Signal (green) / Peak (amber), battery (low battery: red) / Power LED (power ON: green)
• Power Supply - 9 V block battery, DC low voltage power adapter
• Operating Voltage - 9 V DC
• Power Consumption - Nom. 70 mA / Max. 150 mA
• Housing Material - plastic
• Housing Surface - soft-touch
• Housing Colour - black
• Dimensions (W x H x D) - 80 x 42.5 x 133 mm
• Weight (without battery) - 165 g
• Accessories (included) - belt clip