• Act Audio Vacuum Tube Amplifier 6C33
  • Act Audio Vacuum Tube Preamplifier RL-1
  • Act Audio Vacuum Tube CD Player RCD-1
  • Act Audio Power Terminal

Vacuum Tube Preamplifier RL-1

We have made a lot of efforts to construct a High-End solution that will provide you with better music reproduction. Vacuum tube for rectification is 5Y3GT. Vacuum tube stabilization tubes are EF86 and 6S19P. Heater voltage is stabilized. Anode filtration via Mundorf MtubeCap capacitors and choke. Output line tubes are 6N30P.

This is a hand made product. All parts have been carefully selected.


After having done a lot of research, a long lasting trial period and according to our experience, pre-amplifier tube 6N30P was chosen as the best solution for a few custom made devices. Capacitors on the signal path are AuriCap (High Resolution) and pure silver Mundorf GS signal wires are used. Potentiometer of volume control is 2x100kΩ with motor, produced by Alps.
Coupling capacitors are AuriCap and Mundorf (High Resolution). The whole of the chassis surface is copperised and finished by plastification.
Relay inputs are Takamisawa and RCA "CMC" gold plated connectors.
The preamplifier features a fluorescent vacuum display module with 5 digits and with an optical filter. The device has a remote control.
The power line transformer has an EI core.

Technical specification

  • Power supply board:
    • Vacuum tube voltage rectification via 5Y3GT
    • Vacuum tube stabilization via EF86 and 6S19P
    • Stabilized Heater Voltage
    • Anode filtration via Mundorf MtubeCap capacitors and choke
    • Independent tube heating via an 6N30P tube per channel at output
    • Anode voltage: 6.3V
  • Output board:
    • 2 x 6N30P - one per channel
    • High resolution Auricap (Coupling) capacitors
    • Mundorf silver GS signal wires (pure silver)
    • RCA "CMC" gold plated connectors at output
  • Characteristics:
    • Frequency response: 10Hz – 40kHz / -3dB
    • Voltage gain: 5.6x (15dB)
    • Dynamic range: > 90dB
    • THD: 0.1% (at maximum gain)
    • Input impedance: 100kΩ
    • Output impedance: 550Ω
    • Power consumption: 120W
    • Voltage: 230V – 50/60Hz
  • Dimensions:
    • Width: 480mm
    • Height: 140mm
    • Depth: 360mm
    • Weight: 13kg