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Product information
The LD Systems HPA 1 is a versatile headphone amplifier with high output power for stage, studio and home recording and the perfect connection solution for wired in-ear-monitoring . A fully-fledged limiter is integrated for distortion-free player and to protect against feedback. At 165 grams, the headphone amplifier is extremely lightweight and can be operated for up to 12 hours with a high-quality 9V block. Specifications:
  • product type: headphone amplifier
  • type: 1-channel stereo
  • number of inputs: 2
  • inputs: AUX In (stereo)
  • inlet connections: 3.5 mm stereo jack (AUX In), XLR-F (L + R input, balanced)
  • impedance: 6000 (XLR In)Ohm, 10000 (3.5mm jack)Ohm
  • Input sensitivity: - 6 (3.5mm jack) dBV, 3 (XLR In)dBu
  • Max. input level: 7 (3.5mm jack) dBV, 16 (XLR In)dBu
  • Protection circuits: Audio limiter, Power OFF - Mute relay, Max. Input leveling
  • quantity of headphone outputs: 1
  • Headphone output ports: 3.5mm stereo jack
  • output power (1% THD @ 33 Ohm load): 2 x 1.65 Vrms
  • Minimum connected impedance: 16 (per channel) ohms
  • frequency response: 20 - 40000Hz
  • THD (THD): 0.04%
  • controls: Power / Volume, balancing L/R, stereo/mono (Focus) switches
  • Display elements: Battery (low battery: red), Power LED (Power ON: green), Peak (Amber), Signal (green)
  • power supply: 9 VDC mains adapter , 9 V block battery
  • operating voltage: 9V DC
  • current consumption: Nominal 0.07A / Max. 0.15A
  • enclosure: plastic
  • Housing surface: soft touch
  • housing colour: black
  • dimensions (WxHxD): 8 x 4.25 x 13.3 cm
  • weight: 0.155kg
  • INCLUDES belt clip
  • Subcategory: In-ear belt pack
  • Active/passive: Active
  • Controls: Volume, balancing. controls, stereo/mono switch
  • Displays: Battery status LED
  • Connections: 2x XLR (input L/R), 3.5 mm jack (aux-in), 3.5 mm jack (phones)
  • Output power: 40mW
  • Mono / stereo: Switchable
  • Limiter: Yes
  • Special features: Stainless steel belt holder
  • Material: Plastic
  • Power supply: Battery (9 V block), external mains adapter
  • Battery life: Approx. 12 hours
  • Dimensions: 80x42.5x133mm
  • Weight: 0.16kg
  • Including: Belt pack, belt clip
About LD Systems

At LD Systems you as a user are in good hands. Your enthusiasm is our benchmark.

No matter whether you are an event technician, system integrator, mobile DJ or musician – your needs are at the center of every decision we make. We develop professional audio solutions with great passion that make your life on the job easier and meet your high expectations for sound and performance.

Of course, we are happy to support you beyond your purchase. With us you will experience one of the best customer support in the industry – true to the motto “Your sound. Our Mission.”

LD Systems ' professional audio product series includes innovative, high-performance PA systems , advanced loudspeaker and subwoofers for live events, installations or battery-powered outdoor use. LD Systems wireless microphone and in-ear monitor systems offer artists full freedom of movement and reliability on stage, as well as excellent speech intelligibility for speakers in conferences.

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