SPL HPm 500-Series Headphone Monitoring Amp

SPL HPm 500-Series Headphone Monitoring Amp



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SPL HPm 500-Series Headphone Monitoring Amp

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Experience the pinnacle of audio excellence with the SPL HPm 500-Series Headphone Monitoring Amp, the revolutionary modular headphone amplifier brought to you by PMT Online. As the first 500-series module to showcase SPL's highly sought-after Phonitor Matrix technology, the HPm sets a new standard in the realm of headphone amplifiers, propelling your audio production to extraordinary heights.

Designed with seamless integration in mind, the HPm effortlessly slots between your DAWs and monitor controllers, seamlessly merging with your existing setup without disrupting your meticulous mixing workflow. With convenient on-the-fly controls for phase inversion, stereo-to-mono conversion, and mute functionality, you have complete mastery over your audio environment, enabling uninterrupted creativity and precision.

Harnessing the power of SPL's flagship Phonitor headphone amplifier, the HPm inherits the groundbreaking Phonitor Matrix technology, a unique proprietary innovation that eradicates the infamous "super stereo" effect often encountered during headphone listening sessions. Through a remarkable system of crossfading, the Phonitor Matrix flawlessly emulates the experience of listening to angled speakers, expertly filling in the gaps that traditional hard-left and hard-right channels fail to capture. Prepare to be immersed in a world where your headphone mixes transcend limitations, seamlessly translating to studio monitors and beyond, both within and outside the confines of your studio space.

In a single compact dual-slot module, the HPm boasts the ability to power two independent headphone outputs, each powered by its dedicated amplifier. This groundbreaking design ensures uncompromising audio quality, adhering to the stringent SPL standards. Furthermore, with independent control for each channel, you can customize the listening experience, catering to the unique preferences of individual users.

The HPm represents a paradigm shift in audio production, seamlessly blending modular design, innovative Phonitor Matrix technology, and dual-channel amplification. Elevate your headphone monitoring to new heights as you unlock the true potential of your audio creations. With the HPm by your side, prepare to embark on a transformative audio journey, where uncompromising quality meets limitless creativity. Experience audio production reimagined with the HPm - a true game-changer.

Key Features:

  • Dual output headphone amplifier
  • Separate amplifiers for each output
  • Built-in Phonitor Matrix functionality
  • Adjustable speaker angle crossfeed control
  • Independent headphone channel controls
  • Stereo/Mono switchable
  • Phase reverse control
  • Designed for 500-series racks and lunchboxes

SPL HPm 500-Series Headphone Monitoring Amp Specifications:

  • Impedance: 10kOhm
  • Max Input Level: +21 dBu
  • Max Output Level: +18 dBu @ 600 Ohm; +15 dBu @ 300 Ohm
  • Frequency Range: 10Hz - 100kHz
  • Noise: -92.3 dBu (A-weighted)
  • THD: 0.00024% @ 0 dBu output, 600 Ohms
  • Dimensions: Dual-Slot 500 series, 0.8kg
More Information
SKU 332332
Shipping Weight (kg) 2.000000


We have a wide range of Delivery Options available, depending on the value of your parcel and budget. Select from our 2-3 Day Saver Service or our Next Working Day options at the Checkout.
This will include a text or email on the day of delivery giving you an exact hour window of when your gear will be with you, and the drivers name - just so you know when to turn the volume down!

  • Free Delivery Available on Selected Products
  • Weekend UK Mainland Delivery (Saturday-Sunday): £19.99
  • Small Items (Under 750g) Small items will be delivered by Royal Mail starting from 99p
  • Heavy Items (Over 30kg): Pallet Service Doorstep Delivery £65

For heavy items, courier details, out of stock products, out of area postcodes or international deliveries see our full Delivery info here.


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If you and your item aren’t getting along, you have 14 days from when you receive the goods to contact our PMT experts either by phone or email to return your item.

*Please note, we cannot accept returns of:

  • Special/Custom Orders - Any order that is custom or has been personalised.
  • Products with Hygiene Seals - Microphones, any in-ear earphones, monitors, orchestral instruments with mouthpieces and any other items that touch your mouth, nose or inner ear if you have broken the hygienic seal on the packaging.
  • Software & Media - Any software or media that has been opened or registered via physical or digital means.

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If you and your new item aren’t getting along, you have 14 days from when you receive the goods to contact our PMT Experts either by phone or email to return your item or organise an exchange for something more suitable.

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