LD Systems HPA 1: Compact Power for Your Ears

If you’re a musician looking for a reliable, high-performance wired IEM (In Ear Monitor) then the LD Systems HPA 1 might be exactly what you need. Designed for use on stage, in the studio, this compact device is a powerful and versatile tool.

What is the LD Systems HPA 1?

The HPA 1 is a headphone amplifier—a small device that boosts audio signals for headphones or in-ear monitors. What makes the HPA 1 stand out is its high power output, rugged design, and a range of professional features packed into a small and lightweight form.

Designed for the Real World

Built with a durable housing, the HPA 1 is made to survive demanding environments, from busy studios to live stage performances. It comes with a belt clip, making it easy to attach to your clothing or gear for hands-free mobility.

Connectivity That Covers All Bases

The HPA 1 is equipped with a variety of input and output options:

• Stereo L/R input via locking XLR connectors: Secure and reliable for stage or studio use.

• 3.5 mm AUX input: Great for click tracks or playback, and it can be used at the same time as the main input.

• 3.5 mm headphone/earphone output: Standard jack for your in-ear monitors or headphones.

There’s also a power input for a mains adapter if you prefer fixed operation instead of battery power.

Control and Protection

You get dedicated knobs for volume and balance, giving you precise control over your mix. There’s also a handy mono/stereo switch, letting you choose between full stereo sound or a summed mono mix.

To protect your ears and your equipment, the HPA 1 includes a built-in limiter. This ensures distortion-free playback even during sudden level spikes, and helps prevent feedback.

Smart and Lightweight

Despite its pro-level capabilities, the HPA 1 weighs only 165 grams—light enough to wear all day. It runs for up to 12 hours on a standard 9V battery, making it ideal for long sessions or gigs.

It also features bi-colour LEDs that show you two important things at a glance:

• Limiter response during audio peaks

• Battery status, so you’re never caught off guard

Final Thoughts

The LD Systems HPA 1 is an ideal solution for anyone who needs high-quality headphone amplification on the go. Whether you’re performing live, recording in a studio, or working on a project at home, the HPA 1 offers great sound, smart features, and rock-solid reliability—all in a compact and user-friendly package.

If you’re serious about your monitoring setup, the HPA 1 is definitely worth checking out.

My drummer usues the LD HPA 1 forour live shows, and swears by it! It makes using In Ear Monitors a breeze whilst providing crystal clear audio. The option to have mono or stereo has come in handy too, as for some shows, the sound engineer is able to provide us with stereo in ear moniotr mixes, which levels up the audio experience. As we're on the road A LOT, the fact that it's built to last is a big plus too.

FAQ

What are In Ear Monitors?

For musicians, IEMs let them hear a customized mix of vocals and instruments during live performances or studio recordings, instead of relying on traditional stage monitors. If you want to find out more about In Ear Monitors, click the image below to read our blog, 'The Gigging Musician’s Guide To In-Ear Monitors (IEMs)'.

Can I use the AUX input and Left / Right inputs simultaneously?

Yes, the AUX input can be used alongside the XLR inputs. This allows you to plug an external device like a phone, laptop, or tablet directly into the HPA 1. For example, you could use the AUX input to set up a click track or backing track, while the XLR inputs are used to connect to the mixing desk so you or the engineer can create your monitor mix.

Can I use the HPA 1 with a PSU (Power Supply)?

Yes, however the power supply for the HPA 1 is sold separately as the main use case is intended for battery operation.

Click here to check out the LD Systems HPA 1

Don't see exactly what you're looking for? We can help! Call myself (Oli), or Richard at the store on 01159383892 Mon - Fri 9:30am to 4pm / Sat 10am to 2pm or send us a message here.