MoFi Electronics UltraPhono Pro Phonostage
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About MoFi Electronics UltraPhono Pro Phonostage
MoFi Electronics UltraPhono Pro Phonostage Key Features:
- Single-input implementation of MasterPhono’s core architecture
- Fully discrete J-FET & MOSFET input/output stages
- Passive RIAA equalization with zero feedback
- Seven-stage regulated balanced power supply
- Front-panel gain and loading controls
- Ultra-low-noise design with carefully selected components
- Precision RIAA accuracy (±0.05 dB)
- Brushed-aluminum panels with rigid steel frame
Product Description:
Created in collaboration with renowned audio engineer Peter Madnick, UltraPhono Pro distills the core architecture of our flagship MasterPhono into a streamlined, single-input, all-analog phono stage. The mission is the same: preserve the sonic integrity MoFi’s mastering engineers capture in the studio by extracting maximum information from your cartridge with as little loss as possible—delivering a natural, unforced presentation without unnecessary complexity.
DIAL IN YOUR CARTRIDGE, STAY IN THE MUSIC
Setup is fast and repeatable with gain and loading controls right on the front panel. Choose the setting that fits your cartridge, then use practical listening tools—mono, subsonic, mute, and dim—to tailor playback for real records in real rooms, without breaking the flow of a listening session.
ENGINEERED FOR LOW-NOISE TRUTH
UltraPhono Pro is built around a fully discrete J-FET and MOSFET gain stage and a passive, zero-feedback RIAA network—choices made to preserve natural transients and tonal realism without editorializing the source. A seven-stage regulated power supply provides an exceptionally quiet foundation, letting dynamics and low-level detail come through with ease.
ZERO-FEEDBACK PASSIVE RIAA
FRONT-PANEL CARTRIDGE MATCHING
Specifications:
| Input | RCA jack, voltage mode, single-ended |
| Gain | RCA output: 40dB, 52dB, 65dB; Balanced output: 46dB, 58dB, 71dB |
| THD | 10mV @1kHz, 40dB gain: 0.005% A-Weighted; 10mV @1kHz, 65dB gain: 0.005% A-Weighted; 1mV @1kHz, 40dB gain: 0.010% A-Weighted; 1mV @1kHz, 65dB gain: 0.013% A-Weighted |
| Loading | 100 Ohms, 300 Ohms, 500 Ohms, 1k Ohms, 47k Ohms |
| Output Impedance | Balanced: 230 Ohms; Unbalanced: 115 Ohms |
| Max Output | Maximum output @1% THD: 10 Volts RMS |
| RIAA Accuracy | ±0.05dB |
| Frequency Response | 10Hz–50kHz ±0.20dB |
| S/N Ratio (20Hz–20kHz) | A-Weighted; Balanced 40dB gain: 82dB, 93dB; Balanced 65dB gain: 78dB, 85dB; RCA 40dB gain: 75dB, 83dB; RCA 65dB gain: 69dB, 75dB |
| Dimensions | 17” x 2.5” x 11.35” |
| Weight | 7 lbs |
