MoFi Electronics Announces UltraPhono Pro Phono Preamplifier
All Image Credit: MoFi Electronics
Mobile Fidelity Sound Labs have released the UltraPhono Pro premaplifier, that brings much of the performance of their flagship MasterPhono to a more accessible price point. This latest model is designed by industry veteran Peter Madnick, it is a single-input phono preamplifier built around the same ultra-low-noise circuit concepts and premium parts selection found in the MasterPhono.
On the outside the design is quite simple with front-panel controls providing practical, listener-focused features, including mono mode, muting, a subsonic filter, and dimmable faceplate illumination. Cartridge matching is equally simple, with five loading options for moving-coil cartridges and three selectable gain settings for both the single-ended and balanced outputs. Internally the fully discrete J-FET & MOSFET input/output stages offers gains up to 71dB while maintaining a wide, linear frequency response of 10Hz–50kHz (±0.2dB) and very accurate RIAA equalization (±0.05dB). Noise is kept impressively low by using polypropylene film/foil capacitors, high tolerance resistors, thermally coupled components and a seven-stage regulated balanced power supply.
Rear panel connectivity is simple supporting; 2 x RCA input and 2 x RCA and XLR outputs.
Key Features at a Glance:
- Fully balanced, DC coupled, servo-controlled signal path from the high-pass filter to the outputs.
- Single-input implementation of MasterPhono’s core architecture
- Fully discrete J-FET & MOSFET input/output stages
- Seven-stage regulated balanced power supply
- Front-panel gain and loading controls
- Ultra-low-noise design with carefully selected components
- Passive RIAA network using polypropylene film/foil capacitors matched to better than 1% with zero feedback
- Precision RIAA accuracy (±0.05 dB)
- Five selectable resistive loading options via front-panel controlled, hermetically sealed gold-on-gold relays: 100, 300, 500, 1k, and 47k ohms
- Gain settings of 40dB, 52dB, and 65dB (+6dB via XLR outputs).
- Critical resistors specified at 0.1% or 0.5% tolerance.
- Thermally coupled critical components to minimize drift over temperature.
- Maximum S/N Ratio (A-weighted): 93dB (MM) / 85dB (MC).
Specifications:
- Input: 1 x RCA, voltage mode, single-ended
- Output: 1 x XLR, 1 x RCA
- 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 (MC): 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
- Brushed-aluminum panels with rigid steel frame
- Dimensions: 17” x 2.5” x 11.35”
- Weight: 7 lbs
MSRP:
- UK: £TBA
- US: $2,495.00
For more information visit the MoFi Electronics web site.
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