Pricing and availability

We compare 600+ stores and found this item at 5 stores. Prices updated .

Sweetwater
5.0 (1)
$999.00
Amazon
5.0 (4)
$649.99 Used
Reverb
$999.00 New
$809.00 Used
Thomann
4.8 (13)
$777.00

Price History

Based on price data from 3 merchants for "SPL Phonitor One D Headphone Amplifier". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

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Description

Immerse yourself in the world of precision audio with the SPL Phonitor One D Headphone Amplifier. Designed for both studio professionals and audiophiles, this amplifier offers the perfect balance between advanced technology and intuitive design. The Phonitor Matrix, a standout feature, transforms headphone listening into a speaker-like experience by simulating speaker positioning. This means your mixes will sound consistent whether you're in the studio or on the go. With the premium AK4490 converter chip, renowned for its low distortion and high resolution, the Phonitor One D ensures every detail of your music is captured with crystal clarity.

This amplifier is not only about high-quality sound but also about connectivity and versatility. It offers three stereo input options: balanced 1/4-inch TRS, unbalanced RCA, and a digital USB input, making it adaptable for various audio sources. The USB connection is class-compliant, ensuring seamless integration with Mac and iOS devices, while Windows users can easily download the required driver. Its Class AB push-pull amplifier design provides ample power for both high- and low-impedance headphones, ensuring versatility across different audio equipment. With its robust build and high-end components, including Burr-Brown OPA 2134 op-amps, the Phonitor One D is built to last and perform.

Key Features:

  • Premium AK4490 converter chip with 32-bit DA/AD capabilities
  • Phonitor Matrix with adjustable Crossfeed, Speaker Angle, and Center Level
  • Three stereo inputs: balanced 1/4-inch, unbalanced RCA, and digital USB
  • Class AB amplifier suitable for a wide range of headphone impedances
  • Class-compliant USB for Mac and iOS; driver required for Windows
  • Compact design with high-quality build for studio and home use

Product specs

Type Headphone Amp with DA Converter
Input Channels 2 x Stereo (analog), 1 x Stereo (digital)
Output Channels 1 x Stereo (analog)
Analog Inputs 2 x 1/4" TRS (L/mono, R), 1 x Dual RCA Stereo
Analog Outputs 2 x 1/4" TRS (L/R)
Headphones 1 x 1/4" TRS
USB 1 x Type B
Controls per Channel Crossfeed, Speaker Angle, Center Level
Form Factor Desktop
Power Supply 12V DC power supply (included)
Height 1.9"
Width 8.2"
Depth 8.6"
Weight 3.2 lbs.

FAQs

What type of digital inputs does the SPL Phonitor One D Headphone Amplifier support?

The SPL Phonitor One D supports a USB Type B digital input, allowing for direct connection to computers, tablets, or phones for high-resolution audio playback.

How does the crossfeed function on the SPL Phonitor One D enhance listening?

The crossfeed function simulates the natural blending of sounds between your ears, similar to listening to speakers, providing a more realistic and comfortable headphone experience.

Is the SPL Phonitor One D compatible with Mac and iOS devices without additional drivers?

Yes, the SPL Phonitor One D is class-compliant, meaning it works seamlessly with Mac computers and iOS devices without needing extra drivers, although iOS devices require a camera adapter.

What kind of power supply does the SPL Phonitor One D require?

The SPL Phonitor One D comes with a 12V DC power supply, which is necessary for optimal performance and should be used exclusively with the included unit.

Can the SPL Phonitor One D be used as a standalone DAC?

Yes, the SPL Phonitor One D can function as a standalone DAC, outputting the selected input signal unchanged at the line out, making it versatile for various audio setups.

The Headphone Show

The Headphone Show

SPL Phonitor One D Review - $700 DAC/Amp combo

Video thumbnail for SPL Phonitor One D Review - $700 DAC/Amp combo by The Headphone Show

SPL Phonitor One D Review - $700 DAC/Amp combo

The Headphone Show

The Headphone Show

Video thumbnail for SPL Phonitor One D | Don't Mix On Headphones....Without This! by ★ ZndBorn Mixed It ★

SPL Phonitor One D | Don't Mix On Headphones....Without This!

★ ZndBorn Mixed It ★

★ ZndBorn Mixed It ★

Video thumbnail for Phonitor One d – Overview by SPL - Sound Performance Lab

Phonitor One d – Overview

SPL - Sound Performance Lab

SPL - Sound Performance Lab

Video thumbnail for SPL Series One – Introduction Phonitor One & Phonitor One d by SPL - Sound Performance Lab

SPL Series One – Introduction Phonitor One & Phonitor One d

SPL - Sound Performance Lab

SPL - Sound Performance Lab

Video thumbnail for SPL Series One – The First Chapter: Marc One, Control One, Phonitor One d and Phonitor One by SPL - Sound Performance Lab

SPL Series One – The First Chapter: Marc One, Control One, Phonitor One d and Phonitor One

SPL - Sound Performance Lab

SPL - Sound Performance Lab

Reviews

PROS

  • Pristine audio conversion delivers a complete spectrum of sound

  • Crossfeed parameter enhances mono perception and balances stereo effect

  • Incredible transient response for detailed sound

  • Compact unit with superb build quality

  • Smooth and powerful sound output

  • Ideal for mixing tracks directly on headphones

  • Significant improvement over direct computer audio output

CONS

  • Requires quality hi-fi headphones to fully experience benefits

  • Can be extremely loud, risk of hearing damage

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about SPL Phonitor One D Headphone Amplifier.

Features and functionality

  • Users report that the SPL Phonitor One D significantly enhances sound clarity compared to using an audio interface like the UAD Apollo Twin X.

    Source
  • Owners appreciate the integrated power brick in the Phonitor One D, preferring it over external ones due to its added heft.

    Source
  • The crossover feature of the Phonitor One D is primarily beneficial for mixing, shifting the soundstage forward to avoid an "in your head" sensation.

    Source

Comparisons

  • The SPL Phonitor One D is contrasted with the beyerdynamic dt 770 pro, with users noting dissatisfaction with the headphones' sound for mixing.

    Source
  • The Phonitor One D is described as sounding darker and less "in your face" compared to the Burson Playmate 2, which is perceived as cold and overly analytical.

    Source

User experience

  • Long-term users of KZ ZST IEMs find them preferable for mixing over more expensive headphones like the beyerdynamic dt 770 pro, despite their lower price point.

    Source
  • Users find the Phonitor One D makes poorly produced tracks sound more pleasant compared to the Burson Playmate 2, which highlights production flaws.

    Source

Use cases and applications

  • The Phonitor One D is highly valued by home studio users who prefer headphones over monitors due to clarity and apartment noise restrictions.

    Source
  • The crossover feature is most effective with music streaming, like Spotify, set at 30-40%, but not as useful for gaming according to owners.

    Source

Critic Reviews

Fresh From the Bench: SPL Phonitor One d Headphone Amplifier System | audioXpress

audioxpress.com

SPL's Phonitor One D headphone amplifier is a robust contender for audiophiles, offering a stellar DAC and a unique crossfeed Matrix that enhances the listening experience. The build quality impresses with its luxurious feel, and the ASIO drivers are glitch-free. However, its high output impedance limits performance with low-impedance headphones, potentially altering the sound signature. While the Phonitor Matrix mitigates the "stuffed ears" effect, it falls short of providing genuine loudspeaker-like imaging. Priced at $799, it's not cheap, but SPL's reputation for reliability adds value. A compelling choice, but best suited for high-impedance headphones.

SPL Phonitor One D Headphone Amplifier review on audiotechnology.com

audiotechnology.com

SPL's Phonitor One D is a robust headphone amp that delivers clean, powerful amplification without venturing into gimmicky audiophile territory. Its Phonitor Matrix feature is a practical tool that enhances headphone mixes for better translation to monitors. While its high-resolution DAC is a boon for hi-res audio fans, the conversion might be overkill for typical DAW use. At $1099, it offers excellent value for those seeking superior headphone monitoring, though it might not rival higher-end alternatives. Overall, it's a worthwhile investment for both studio monitoring and music enjoyment.

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