MoFi Electronics UltraPhono Pro Phonostage Preamp

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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
A passive RIAA equalization network with zero feedback preserves natural transients and tonal realism. Precision film-foil parts maintain equalization accuracy within ±0.05 dB.

Front-Panel Cartridge Matching
Gain and loading are right on the front panel for fast, repeatable setup. Dial in a cartridge in seconds, then lock it in with confidence.

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

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