SPL Phonitor SE red

The SPL Phonitor SE represents the entry point to the audiophile excellence of the Phonitor range, renowned for its exceptional sound quality. This high-end headphone amplifier, made in Germany, offers a refined listening experience thanks to its innovative technology and meticulous construction. Designed to satisfy the most demanding audiophiles, the Phonitor SE combines power, precision, and versatility in an elegant and compact casing.

VOLTAiR Technology: the heart of the Phonitor SE

At the heart of the Phonitor SE lies VOLTAiR technology, SPL’s true signature. This innovation is based on the use of discrete operational amplifiers capable of operating at a voltage of 120V, approximately double what standard components can handle. This high operating voltage significantly improves the signal-to-noise ratio and reduces overall distortion by about 4.5 times (13dB).

In practical terms, this technology results in sound reproduction of remarkable clarity, with extended dynamics and virtually nonexistent distortion. The subtlest nuances are reproduced with striking fidelity, offering a wide and precise soundstage. This unique technical approach allows the Phonitor SE to compete with much more expensive devices in terms of sound quality.

Design and Build Quality

The Phonitor SE features a sleek and elegant design, typical of German industrial aesthetics. Its brushed aluminum casing, available in silver or black finishes, exudes solidity and refinement. Its compact dimensions (278 x 57 x 330 mm) make it easy to integrate into any audio setup.

The build quality is exemplary, as evidenced by the choice of components. The volume potentiometer, a crucial element for a headphone amplifier, is an Alps RK27 “Big Blue,” renowned for its precision and durability. The rotation of this potentiometer, controlled by a solid aluminum knob, provides a pleasant tactile sensation, often described as “a spoon in honey.”

The interior of the device is equally impressive, with a shielded toroidal transformer ensuring stable and noise-free power supply. This attention to detail reflects SPL’s commitment to quality and the longevity of its products.

Connectivity and Versatility

The Phonitor SE stands out for its versatility in terms of connectivity. In its base version, it features an analog RCA input, ideal for traditional hi-fi sources. The Phonitor SE-DAC version includes an additional digital-to-analog converter (DAC768xs) offering USB, coaxial, and optical digital inputs. This option allows direct connection of modern digital sources such as computers or network players without requiring an external DAC.

The headphone output is via a standard 6.35 mm jack, capable of delivering an impressive power of 2x5W at 250 ohms. This generous power reserve enables the Phonitor SE to effortlessly drive even the most demanding headphones, including planar or electrostatic models known for their high power requirements.

A practical feature worth mentioning is the ability to control volume and source selection using any infrared remote control, following a simple learning procedure. This functionality, rare in headphone amplifiers, significantly enhances everyday usability.

Sound Performance

The sound performance of the Phonitor SE lives up to its reputation. The VOLTAiR technology translates into remarkable neutrality and very fine detail resolution. The extended frequency response (10 Hz - 300 kHz at -3 dB) ensures faithful reproduction across the entire audible spectrum and beyond.

The soundstage is wide and well-defined, with precise instrument separation and stable stereo imaging. The bass is firm and well-controlled, never overwhelming. The mids are natural and rich, while the highs shine with their extension and lack of harshness.

Dynamics are a strong point of the Phonitor SE, capable of reproducing both the most delicate nuances and the most intense passages without apparent compression. This ability to handle significant dynamic ranges greatly contributes to the realism of the listening experience.

Comparison with Other Phonitor Models

Although positioned as the entry-level model in the Phonitor series, the SE shares the same amplification section as its higher-end siblings, the Phonitor X and XE. This means the intrinsic sound quality is similar across the three models.

The differences lie mainly in additional features. The higher-end models offer more advanced adjustment options, such as the Phonitor Matrix for simulating speaker listening, or additional outputs. The Phonitor SE focuses on the essentials: high-quality amplification in a more compact format and at a more accessible price.

Frequently Asked Questions

What is the main difference between the Phonitor SE and the X and XE models?

The main difference lies in the additional features of the higher-end models, such as the Phonitor Matrix and extra outputs. The basic sound quality is similar thanks to the use of the same amplification technology.

Can the Phonitor SE drive planar or electrostatic headphones?

Yes, thanks to its high output power (2x5W at 250 ohms), the Phonitor SE can effectively drive most planar and electrostatic headphones on the market.

What does the VOLTAiR technology bring to the listening experience?

The VOLTAiR technology significantly improves the signal-to-noise ratio and reduces distortion. This results in increased clarity, better detail definition, and extended dynamics.

Can the Phonitor SE be used as a preamplifier?

No, the Phonitor SE is designed exclusively as a headphone amplifier and does not have line outputs for use as a preamplifier.

Technical Specifications

Inputs

• Analog input: RCA
  • Maximum input gain: 32.5 dBu
  • Input impedance: 20 kΩ
• Digital inputs: DAC768xs (optional)
  • Coaxial SPDIF (RCA), PCM sampling rates: 44.1 / 48 / 88.2 / 96 / 176.4 / 192 kHz
  • Optical SPDIF (Toslink F06), PCM sampling rates: 44.1 / 48 / 88.2 / 96 / with optical fiber <1 m: 176.4 / 192 kHz
  • USB (B), PCM sampling rates: 44.1 / 48 / 88.2 / 96 / 176.4 / 192 / 352.8 / 384 / 705.6 / 768 kHz
  • USB (B), DSD over PCM (DoP), sampling rates: 2.8 (DSD64), 5.6 (DSD128), 11.2 (DSD256) MHz
  • 0 dBFS calibrated to: 15 dBu

Headphone Output

• Standard headphone output, TRS 6.35 mm jack
  • Wiring: tip = left, ring = right, sleeve = ground
  • Output impedance: 0.18 Ω
  • Damping factor (40 Ω): 180
  • Frequency response (0 dBu): 10 Hz – 100 kHz
  • Crosstalk (1 kHz, 0 dBu): -90 dB
  • THD + N (1 kHz, 0 dBu): 0.00091%
  • Background noise (A-weighted): -103 dBu
  • Output power (1 kHz, 1% THD, 250 Ω): 2 x 5 W
  • Output power (1 kHz, 1% THD, 32 Ω): 2 x 1 W
  • Dynamic range: 135.5 dB

Power Supply

• Internal linear power supply with shielded toroidal transformer
  • Operating voltage for analog audio: +/- 60 V
  • Operating voltage for relays and LEDs: +12 V
• Mains power supply
  • Mains voltage (selectable, see fuse compartment): 230 V AC / 50 Hz; 115 V AC / 60 Hz
  • Fuse for 230 V: T 0.5 A
  • Fuse for 115 V: T 1 A
  • Power consumption: max. 30 VA
  • Standby power consumption: < 0.3 W

Physical Characteristics

• Dimensions W x H x D (width x height with feet x depth): 278 x 57 x 300 mm
• Device weight: 2.8 kg
• Shipping weight (including packaging): 5 kg