The all-important component of this phono stage comprises two ECC83/12AX7 and one ECC82/12AU7 that is run by a multi-stage fully regulated power supply. To back this up the design has an over size shielded power transformer to reduce the interference. An array high grade metalized polypropylene capacitors controlling the audio signal circuits. The MM input stage uses a low noise JFet with a separate regulated power supply with extensive filtering for reducing the interference and noise. Using an ECC82/12AU7 tube on the output stage gives this unit a very low output impedance without losing the signal. The Roma79DC has easily selectable capacitors MM and impedances MC for cartridges by a front-mounted knob selector which is also shown on the front LCD display.
SPECIFICATIONS
Gain stage each ch: 1 X ECC83 MM + ultralow noise
JFET MC stage
Out stage each ch: 1/2 X ECC82
Frequency response: RIAA curve 20Hz - 20KHz +- 0,5dB
Gain MM: 40dB
Gain MC: 60dB
Cartridge load: Selectable by front knob
MM: 47Kohm
47/100/150/200/270/370pF
MC: 100pF
22/47/100/150/330/1Kohm
Signal/Noise ratio: > 80dB MM, > 60dB MC
Power consumption: 30W
Dimensions: w,d,h 260x380x95mm
Weight: 5 Kg
