• 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

The vacuum tube preamplifier RL-1 is a high-end device for audiophiles with rectification vacuum tube 5Y3GT. The stabilization vacuum tubes are EF86 and 6S19P. Heater voltage is stabilized. Anode filtration is supported by the Mundorf MtubeCap capacitors and choke.


The output line tubes are 2 x 6N30P – one per channel. The capacitors on the signal path are AuriCap and pure silver Mundorf GS signal wire are used. The potentiometer of volume control is 2 x 100 kΩ with a motor, produced by Alps. The coupling capacitors are AuriCap and Mundorf.
The whole of the chassis surface is copperised and finished by plastification.
The relay inputs are Takamisawa and 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.
This is a handmade and unique product. All parts have been carefully selected.




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: 6.3 V
  • Output board:
    • 2 x 6N30P - one per channel
    • High resolution AuriCap capacitors
    • Mundorf GS signal wire (pure silver)
    • CMC gold plated connectors at output
  • Characteristics:
    • Frequency response: 10 Hz – 40 kHz/-3 dB
    • Voltage gain: 5.6x (15 dB)
    • Dynamic range: > 90 dB
    • THD: 0.1% (at maximum gain)
    • Input impedance: 100 kΩ
    • Output impedance: 550 Ω
    • Power consumption: 120 W
    • Voltage: 230 V – 50/60 Hz
    • Fuse: SB 1.25A/250V
  • Dimensions:
    • Width: 480 mm
    • Height: 140 mm
    • Depth: 360 mm
    • Weight: 13 kg