ARCAM FMJ C49 Pre Amplifier

Technical Specifications

Inputs - Phono (MM) cartridge

• Input sensitivity at 1kHz - 5mV
• Input impedance - 47kΩ +100pF
• Frequency response (ref. RIAA curve) - 20Hz-20kHz +/- 1dB
• Signal/noise ratio (Awtd) 50W, ref. 5mV input - 80dB
• Overload margin, 5mV at 1kHz - 20dB

Inputs

• Nominal sensitivity - 1V (RCA), 2V (XLR)
• Input impedance - 10kΩ
• Maximum input - 4.6V (RCA), 8.2V (XLR)
• Frequency response 20Hz-20kHz +/- 0.05dB
• Signal/noise ratio (Awtd) 50W, ref 1V input - 105dB

Preamplifier output

• Nominal output level - 1.15V (RCA), 2.3V (XLR)
• Output impedance - 47Ω (RCA), 200Ω (XLR)

Headphones output

• Maximum output level into 600Ω - 4Vrms
• Output impedance - 1Ω
• Load range - 16Ω-2kΩ

General

• Power consumption (standby) -

BLACK
 
Bandwidth 5Hz to 90kHz, -3dB Maximum output
voltage 8.5Vrms (47 kOhm load)
Overall gain 40dB-60dB @ 1kHz selectable with
dip- switch.
Input Impedance 29 Ohm - 100 kOhm selectable
with dip-switch.Selectable input Capacitance.
Input Unbalanced 1 pair x channel (RCA)WBT
Output Unbalanced(RCA)WBT - MM,
high output
MC, low output MC.
Handmade Litz cable for this specific application
from White Gold. JFET differential built around Toshiba 2SK170 among the most noiseless transistor of the current production.

• Input impedance : 47kohms
• Input capacitance : 120pF
• Gain : 40dB
• Output voltage(typically) : 500mV @ 1KhZ with 5mV input
• Noise floor : 88dB (A weighted)
• THD :

High rigidity metal frame
• Shielded power supply
• Separated toroidals for analogue and digital
• Rubber insulated aluminium feet
• WBT and Neutrik connectors
• Fully discrete analogue design
• Motorized ALPS blue series volume
control
• Buffer and Gain cards on socket for future
upgrades
• Metal machined remote control
• Trigger signal for link to Monoblock amplifier

The Fono MC is an exceptionally high quality MC phono stage designed to maximise the potential of any MC cartridge. Although specifically to compliment the latest Rega range of  moving coils you will find full adjustability for loading is available via dip switches conveniently placed on the rear panel with two different gain settings located on the back panel making the Fono MC compatible with most low output MC cartridges.

The Fono MC has been designed to be effective, easy to use, and above all, to reproduce music. The Fono MC uses the Linear Systems low noise LSK389 FET in an all discrete input stage where low noise and linearity are vitally important to get the best from an MC cartridge. Because of the high input impedance of FET, the loading effects of the amplifier circuit are minuscule and do not affect the performance of the cartridge.

A MUSE operational amplifier is used in the RIAA equalization amplifier. Polypropylene capacitors have been used in the signal path and in the RIAA equalization circuits. There is selectable input loading for both resistance and capacitance along with two different gain settings located on the back panel making the Fono MC compatible with most low output MC cartridges.

The aesthetic design of the Fono MC was as important as the quality of its electrical capabilities, so it benefits from the same aluminium case as the Rega TTPSU and Fono MM amplifier, giving it a design which offers a familiar feel and moreover brings it in line with its illustrious bigger brothers. The new Fono MC circuit resulted from the design work carried out on the Aria phono amplifier.

The Fono disk stage is designed to amplify the signal from a moving coil cartridge to a level which can feed into a 200mV line level input on a standard hi-fi amplifier.

Specifications

Output impedance = 200Ω
Recommended minimum output load resistance = 5K
Frequency response (50KΩ output load) = 13Hz (-3dB) to 100KHz (-0.3dB)
RIAA accuracy (50KΩ output load) = Better than +/-0.2dB 100Hz to 100KHz
Power requirements = 24V AC at 150mA maximum. Only to be used with Rega PS1.

Input sensitivity (for 200mV output)
4 off = 133uV
4 on = 67uV

Input loading resistance
1 and 2 off = 400Ω
1 on = 100Ω
2 on = 150Ω
1 and 2 on = 70Ω

Input loading capacitance
3 off = 1000pF
3 on = 4300pF
Gain (at 1KHz)
4 off = 63.5dB
4 on = 69.5dB

Maximum input level (at 1KHz)
4 off = 6.7mV
4 on = 3.4mV

Load settings for adjustable MC stages

Impedance -100ohm
Capacitance - 1000pF
Gain setting - High (\'On\' position for Rega phono stages)

Fono MC dip switches settings (factory set at Rega for Rega MC models).