Informations
Product description
The Phonitor X is a high-voltage analog headphone amplifier and preamplifier (with optional DAC) built for serious listening or monitoring setups. It uses SPL’s “120 V rail” technology for high dynamic range, strong output power, and low distortion — capable of driving demanding, high-impedance headphones. It doubles as a preamp for full stereo systems, with both balanced and unbalanced inputs/outputs, making it a flexible central unit for headphone and speaker setups.
Key Features
• High-voltage analog architecture for wide dynamics and clean output
• Balanced 4-pin XLR and unbalanced 6.35 mm headphone outputs, powerful enough for demanding headphones
• Balanced (XLR) and unbalanced (RCA) analog inputs + optional digital inputs (USB, coaxial, optical) when DAC module installed
• Preamp output for speakers or powered monitors — works also as line-level preamp
• “Phonitor Matrix” crossfeed and speaker-simulation circuitry for realistic headphone listening experience
• Laterality / balance control and mono switch for flexible headphone tuning and mixing applications
• Remote-controllable volume and robust build quality
Specifications
| PRODUCT | SPL Phonitor X Headphone Amplifier & Preamplifier |
| Analog Inputs | Balanced XLR ; Unbalanced RCA |
| Input Impedance | ~20 kΩ (XLR), ~10 kΩ (RCA) |
| Maximum Input Level | +32.5 dBu |
| Headphone Outputs | Balanced 4-pin XLR ; Standard 6.35 mm stereo jack |
| Balanced Output Impedance | 0.36 Ω |
| Unbalanced Output Impedance | 0.18 Ω |
| Output Power (balanced, 250 Ω) | 2 × 3.5 W (approx.) |
| Output Power (unbalanced, 250 Ω) | 2 × 5 W (approx.) |
| Frequency Response (headphones) | 10 Hz – 300 kHz (-3 dB) |
| THD + N (1 kHz, 0 dBu) | ~0.00085% – 0.00091% |
| Crosstalk (1 kHz, 0 dBu) | ~-90 dB |
| Noise (A-weighted) | < -98 dBu (balanced output) / < -103 dBu (unbalanced) |
| Dynamic Range (balanced) | ~130.5 dB (HP) / 135.5 dB (Line) |
| Line Outputs | Balanced XLR ; Unbalanced RCA — for driving power amplifier or active speakers |
| Optional Digital Inputs (with DAC module) | USB-B, Coaxial SPDIF, Optical SPDIF — for external digital sources |
| Preamplifier Output Level | +32.5 dBu max |
| Power Supply / Voltage Rails | ± 60 V analog rails (high-voltage design) |
| Mains Supply (selectable) | 115 V / 230 V AC, 50/60 Hz |
| Power Consumption (max) | 40 VA |
| Dimensions (W × H × D) | 278 × 100 × 300 mm |
| Weight | ~4.4 kg |