Attach all vacuum tubes.
All transformers are HIRATA TANGO. The output transformer is a custom-made product and is equivalent to the X-10S.
The output tube is GM-70, the drive tube is 2A3, and the first stage is C3g. The output is 28W (at distortion rate: 5%) on the type channel, and is a genuine class A amplifier with no feedback. There is a switch that allows you to select -6db NFB, so please use it as you like.
2 monoblocks. The frame is made of high quality Walnut wood, and the top plate is a 3mm copper plate.
A transformer was used to connect directly between the drive stage and output stage (O.U.D.D.C).
This amp uses 2A3 vacuum tubes and drives GM-70 vacuum tubes. B voltage is about 1000V. In order to avoid noise from the high voltage of the power amplifier, the preamplifier and power amplifier are designed separately. 16Hz to 40KHz without feedback (at 28W). The bass is playing at a completely different level. The sound has a great sense of speed and power, and the drive tube is a directly heated tube, so it has rich musicality. Please listen to the field force of GM-70 once.
The residual noise of the 28W output without feedback is less than 1mV. I'm about 1 meter away from the 100db speaker and I don't feel any hum or noise at all.
Output up to 28W can be output to the type channel, so all speakers can be driven with plenty of room.
Before putting it up for sale, it was maintained and inspected by the manufacturer and returned to new condition. The manufacturer's warranty is 3 months.
Specifications (measured by manufacturer): (at the time of Zero NFB)
Output: 28W/8ohm (4ohm, 8ohm, 16ohm are selectable.)
Compatible frequency: 20Hz ~ 35K (flat ±0db) Hz/30W/8 ohm
Noise: 1mV or less
THD 1W 0.3%
Size: W38xD38xH32cm Weight: Approximately 30Kg/unit
Vacuum tube configuration:
First stage: C3gx2
Drive stage: 2A3x2
Output stage: GM-70x2
Rectifier tube: 5AR4 x 2 (5R4GW, 5U4, GZ34 vv.vv..v)
All vacuum tubes are included. However, vacuum tubes are not covered by the warranty.
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