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LD Systems HPA1 Headphone and Wired IEM Amplifier



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    Product Description

    The LD Systems HPA is a headphone amplifier designed for musicians. With locking stereo XLR connectors and a belt clip, the HPA 1 will be at home when you’re in the studio and on stage. You won’t have to rely on the sound guy with the HPA 1 either, with Volume and Balance controls as well as a built in limiter. So you can always hear what’s going on.

    The whole thing runs off a 9V battery which will give you 12 hours, so more than enough for even the longest recording session.

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    Here’s what LD Systems say about the HPA 1:

    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.

    In the Box 

    • Belt Clip


    • Inputs: 2
    • Input Type: 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
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    Here at Andertons Music Co. we believe that we stock some of the best musical equipment in the world. That's why we want to make it as quick and easy as possible for you to get your order, safe and sound!

    We offer a wide range of delivery options to help fit around your busy lifestyle without compromise. This includes free, named-day delivery for most UK postcodes on orders over £99 which are in stock, Saturday & Sunday deliveries, and competitive delivery rates worldwide.

    Please note: Some UK postcodes including remote areas and Northern Ireland are subject to charges.

    You can find full details about the services we offer, including details on our international delivery charges, on our main delivery page. Click here to read more.

    Customer Reviews


    3 reviews





    Trusted Customer2nd Aug 2021

    Value 4Looks 4Durability 4Sound 4

    Mr Jason Carpenter18th Mar 2020

    Value 4Looks 4Durability 4Sound 4

    Mr Leonardo MacKenzie13th Sep 2018

    I spent some time using wireless IEMs but the wired option seems to be a much smoother process for the engineers and comes without any of the interference issues I had before. As a musician who plays seated, it's no less convenient to be wired.

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    Andertons Music Company's Registered Office: 58-59 Woodbridge Road, Guildford, GU1 4RF. Andertons Music Company acts as a credit broker and not a lender and only offers credit products from Secure Trust Bank PLC trading as V12 Retail Finance. Andertons Music Company is authorised and regulated by the Financial Conduct Authority. Credit provided subject to age and status.