Fono Mc Mk4
A dedicated moving coil phono stage for low output MC cartridges, with DIP-switch adjustment of gain and loading on the rear panel. Suited to turntable owners using Rega MC cartridges or compatible third-party low output MC models.
- Phono stage for low output moving coil cartridges
- DIP switches on rear panel set gain, resistance and capacitance
- Two gain settings: 63.5 dB or 69.5 dB at 1 kHz
- Discrete input stage with LSK389 low-noise FET
- MUSE op-amp in the RIAA equalization stage
- Aluminium case matching the Fono MM MK5 and Neo MK2
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The Fono MC MK4 amplifies the signal from low output moving coil cartridges and applies RIAA equalization. Its all-discrete input stage is built around a Linear Systems LSK389 low-noise FET, whose high input impedance keeps the circuit from loading the cartridge. A MUSE operational amplifier handles RIAA equalization, and polypropylene capacitors are used in the signal path and equalization circuits.
Gain and loading are set with DIP switches on the rear panel. Two gain settings are available, along with selectable input resistance and capacitance, which lets it work with many third-party low output MC cartridges as well as Rega's own. Factory settings are matched to all Rega MC models: 100 Ω, 1000 pF and high gain.
The circuit grew out of development work on the Aria phono amplifier. The unit sits in a redesigned aluminium case that matches the Fono MM MK5 and Neo MK2 PSU, and runs from a 24 V AC supply.
Video
Tehnilised andmed
- Bränd
- Rega
- Mudel
- Fono Mc Mk4
- Kategooria
- Hi-Fi ja kodune heli › Võimendid
Audio
- Frequency response (50 kΩ load)
- 13 Hz (-3 dB) to 100 kHz (-0.3 dB)
- RIAA accuracy (50 kΩ load)
- Better than ±0.2 dB, 100 Hz to 100 kHz
- Gain at 1 kHz (switch 4 off)
- 63.5 dB
- Gain at 1 kHz (switch 4 on)
- 69.5 dB
- Input stage
- Discrete, Linear Systems LSK389 FET
- RIAA amplifier
- MUSE operational amplifier
Inputs
- Input sensitivity for 200 mV output (switch 4 off)
- 133 µV
- Input sensitivity for 200 mV output (switch 4 on)
- 67 µV
- Maximum input level at 1 kHz (switch 4 off)
- 6.7 mV
- Maximum input level at 1 kHz (switch 4 on)
- 3.4 mV
- Input loading resistance
- Switches 1 and 2 off = 400 Ω; 1 on = 100 Ω; 2 on = 150 Ω; 1 and 2 on = 70 Ω
- Input loading capacitance
- Switch 3 off = 1000 pF; 3 on = 4300 pF
Outputs
- Output impedance
- 200 Ω
- Recommended minimum output load resistance
- 5 k
Power
- Power requirements
- 24 V AC at 150 mA maximum
Physical
- Case
- Aluminium, matching Fono MM MK5 and Neo MK2 PSU
- Factory settings for Rega MC cartridges
- 100 Ω, 1000 pF, high gain
- Warranty
- Lifetime limited warranty