SYNTHESIS ROMA 79DC

Tube phono stage MM-MC.

The Roma 79DC phono preamplifier completes the trilogy of valve devices in the Roma series, crafted by Synthesis in the Marche region. This journey began with the 14DC+ CD player and the 510AC integrated amplifier. The name Roma 79DC evokes the year of Emperor Vespasian's death and the eruption of Vesuvius, emphasizing a historical connection with Rome.

The preamplifier allows for the selection of cartridge type (MM, MC, MC+) via a button and enables adjustment of capacitance and impedance through a knob. Each turn of the knob triggers an internal "click," indicating relay activation, making it easier to configure for various cartridge models. This solution enhances accessibility and practicality compared to traditional micro switches, allowing for quick setting comparisons.

With a narrower front panel compared to other devices in the series, the Roma 79DC maintains significant depth and weight, attributed to the inclusion of a shielded toroidal transformer. The internal circuitry employs JFETs for MC amplification and ECC83/12AX7 valves for the MM signal, with output handled by an ECC82/12AU7 in a cathode follower configuration. The use of high-quality components, such as metallized polypropylene capacitors, underscores the attention to construction detail.

During listening tests, the Roma 79DC exhibited remarkable quietness and balanced sound reproduction, capable of adapting to different cartridges and configurations. The sound output is dynamic and detailed, with a well-defined spatial stage, without sacrificing the characteristic warmth of valve equipment. The build quality and sonic performance position the Roma 79DC as an excellent choice for those seeking a no-compromise phono preamplifier in this price range.

Technical Specifications:

• Input Stage (1 channel): 1 x 12AX7/ECC83 valve for MM, ultralow noise JFET for MC
• Output Stage (1 channel): 1/2 x 12AU7/ECC82 valve
• Frequency Response: 20Hz - 20KHz, ±1 dB
• Gain:
  • MM: 40 dB
  • MC: 60 dB
  • MC+: 65 dB
• Signal-to-Noise Ratio (S/N):

  • 80 dB for MM (A-weighted)

  • 70 dB for MC (A-weighted)

• Cartridge Load (selectable via front knob):
  • MM type: 47 KOhm
  • Capacitance: 47, 100, 150, 200, 270, 320, 370, 420 pF
  • MC type: 100 pF
  • Impedance: 22, 33, 50, 75, 100, 150, 330, 1000 Ohm
• Output Level: >2V RMS
• Output Impedance: <500 Ohm
• Dimensions (W x D x H): 260 x 380 x 95 mm
• Weight: 5 kg