SPL Phonitor One Audiophile Headphone Amplifier

SPL Phonitor One Audiophile Headphone Amplifier



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SPL Phonitor One Audiophile Headphone Amplifier

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Phonitor One is a concisely featured headphone amplifier built from highly desirable components and designed with audiophiles in mind. Inherited from some of SPL’s most revered high-end headphone amplifiers, Phonitor Matrix technology is a powerful tool that emulates the experience of mixing on studio monitors, translated to headphones.Phonitor One features a centre-level preset hardcoded to -1 dB as well as a default speaker angle of 30 degrees to assume the most popular mixing settings.

On the Phonitor One's front panel, the Crossfeed function can be used to determine the crosstalk between channels, a technical metric known as "interaural level difference.” The Phonitor One’s power amp output stage transistors are each thermally coupled to run coherently and contribute to a reliably consistent stereo image during listening. The Phonitor One’s preamp stage is powered by two Burr-Brown OPA 2134 SoundPlus op amps specially designed for audiophile circuits and emitting a low distortion value of just 0.00008%. The preamp’s true FET stage allows for a slew rate of 20V/µs resulting in a high-speed op amp and a jump in playback liveliness.

The output stage of Phonitor One has been specifically designed as a push-pull configuration in class AB mode. Bipolar transistors then share amplification of both positive and negative half waves to produce higher output voltage and gain, even when compared to Class A operation.

Key Features:

  • 2x balanced jack inputs
  • 2x mono RCA inputs
  • Burr Brown SoundPlus op-amps
  • Class A/B power amp
  • Thermally coupled output transistors
  • On-board Phonitor Matrix
  • Crossfade control to manipulate crosstalk settings
  • Up to 22.5dB gain thanks to 17V operation

SPL Phonitor One Audiophile Headphone Amplifier Specifications:

  • Max Input: +22.5 dBu
  • Common Mode Rejection: < 60 dB
  • Source Impedance: 20 O
  • Frequency Range: 10 Hz - 200 kHz (-3 dB)
  • Noise: -97 dBu (A-weighted, 600 O)
  • THD: 0.013 % (0 dBu, 10 Hz – 22 kHz, 32 O)
  • Max Output: 2 x 330 mW (250 O)
  • Crosstalk: -75 dB (1 kHz, 600 O)
  • Dimensions: 210 x 49.6 x 220 mm (WxHxD), 1.4kg
More Information
SKU 332339
Shipping Weight (kg) 2.000000
Warranty 2 Years


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.

Click here for more information on Returns at PMT.

Online Orders

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.

Store Orders

If you've changed your mind about something you bought in-store, bring it back within 14 days of purchase and we'll be happy to exchange it for another product, a gift card or store credit.