SPL Phonitor One d – Audiophile Headphone Amplifier with Phonitor Matrix & 32-Bit DAC

The SPL Phonitor One d is a high-fidelity headphone amplifier featuring innovative Phonitor Matrix, a 32-bit DA-converter, and exceptional sound quality. Designed for professional audio engineers and audiophiles alike, it ensures precise stereo imaging, deep detail, and a fatigue-free listening experience. With the ability to process digital audio up to 32-bit/768 kHz and DSD256, this compact powerhouse offers reference-grade playback.

Key Features

• Premium 32-Bit DAC (AKM AK4490): High-resolution audio processing with PCM up to 768 kHz & DSD256.
• Phonitor Matrix: Revolutionary headphone monitoring system for speaker-like stereo imaging.
• Three Stereo Inputs: 2x Analog (TRS & RCA), 1x Digital (USB).
• Class AB Push-Pull Amplification: High output power for demanding headphones.
• Line Output: Functions as a standalone DAC for external monitoring systems.
• Precision Volume Control: Ideal for professional monitoring and critical listening.
• Optimized Power Supply: Internal secondary power stage generates +/-17V for high headroom.

Phonitor Matrix – Studio-Quality Headphone Monitoring

The Phonitor Matrix corrects stereo imaging on headphones, ensuring mixes translate accurately to speakers. It includes:

• Crossfeed: Adjustable channel blending to replicate speaker-like sound perception.
• Fixed Angle (30°): Studio standard speaker placement for natural imaging.
• Center Attenuation (-1 dB): Maintains proper stereo balance for realistic spatial positioning.

Premium 32-Bit DAC – Velvet Sound Technology

Featuring the AKM AK4490 DAC with Velvet Sound® architecture, the Phonitor One d delivers ultra-low distortion and maximum detail retrieval. Supports:

• PCM: Up to 768 kHz (16x CD resolution).
• DSD: Up to DSD256 (11.2 MHz) via USB.

Auto-synchronization ensures seamless playback with any digital source.

Multiple Connectivity Options

• USB (Type B): Direct connection to computers, tablets, or smartphones.
• Analog Inputs: Balanced TRS & unbalanced RCA for CD players, synths, or mixers.
• Line Output: Direct signal pass-through for external monitoring or recording.

Perfectly Optimized Headphone Amplifier

Designed for power and precision, the Phonitor One d drives headphones with ease, thanks to:

• Class AB Push-Pull Amplification: Maximizes output voltage and gain.
• Thermally Coupled Transistors: Stable and consistent sound reproduction.
• High-Current Power Supply: Low-resistance buffer circuit for optimal performance with low-impedance headphones.
• -10 dB DIP Switch: Attenuates output for highly sensitive headphones.

Specifications

Analog Inputs & Outputs:

• Input Gain (Max): +22.5 dBu
• Input Impedance: Balanced TRS (20 kΩ), Unbalanced RCA (47 kΩ)
• Common Mode Rejection: < 60 dB
• Output Gain (Max): +22 dBu
• Output Impedance: 150 Ω (Balanced Line Out)
• Frequency Range (-3 dB): 10 Hz – 200 kHz

Digital Input & DAC Performance:

• USB (Type B): PCM Sample Rates: 44.1 – 768 kHz, DSD up to DSD256
• 0 dBFS Calibration: 15 dBu
• Noise (A-weighted): -113 dBFS
• THD+N (-1 dBFS): 0.0012%
• Dynamic Range: 113 dB

Headphone Output:

• Source Impedance: 20 Ω
• Output Power: 2x 190 mW (600Ω), 2x 330 mW (250Ω), 2x 400 mW (47Ω)
• THD+N (600Ω, 0 dBu): 0.002%
• THD+N (32Ω, 0 dBu): 0.013%
• Noise (A-weighted, 600Ω): -97 dBu
• Dynamic Range: 121.5 dB

Power Supply:

• Internal Secondary Power: ±17V (Analog), ±19V (Headphone Stage)
• External PSU: 12V DC, 1.5A (Included)
• Power Consumption: Max 12W

Dimensions & Weight:

• W x H x D: 210 x 49.6 x 220 mm (8.23 x 1.95 x 8.66 inches)
• Weight: 1.45 kg (3.2 lbs)
• Shipping Weight: 2 kg (4.4 lbs)

The SPL Phonitor One d is the perfect choice for engineers, producers, and audiophiles seeking flawless high-resolution audio and speaker-accurate monitoring in a compact format.