OTOMON Laboratory　(音門ラボ)/Product details page

It is special order made SE amplifie using 211 tube as power tube. Stereo spec, output is 18~20W per channel. Driver tube is 2A3 or 45, using O.U.D.D.C in driving power tube. This amp weight is 50kg.

You can use both 2A3 and 45 tube as driver tube. Price for this amplifier is 8500USD plus shipping fee, tubes are not included. Building time is 2-3 months. Input voltage is 100,117,230V

What is difference in the new design of this amp

1. The wiring from parts to parts will be shortest distance.
2. The audio signal is not merged with power voltage signal make the audio signal become more clear, prevent the high frequency noise from high power voltage approximated 1000V

Driver tube is 2A3, you can use 45 tube without any modification. Prestage tube is 396A. No NFB ( based on speaker that customer uses, it may adopt a little NFB for better performance. In case NFB is adopted, there is switch let customer use Zero NFB mode)

Plate voltage 960V.

Very hot and rich bass sound as characteristic of O.U.D.D.C (Otomon Ultimate Direct heat tube Drive Circuit) ( detail here > http://soundgate.net/product/MTQ1MA...highend ) Response frequency is flatted from 20Hz at 16W of power. This is impossible thing as using interstage transformer or any other method to drive triode tube. The result as using the same output transformer in schematic using interstage transformer, at 28W, from 20Hz to 50Hz, it drops -3 db.

Specification: Zero NFB mode

Output : 18W.
Noise : under 1mV
Response frequency:
20Hz~40K Hz ( flatted ) at 16W
16Hz ~ 55K Hz(-1db)
Distortion: 0.5% 1W 5% 18W

Can be match with almost speaker, and all genre of musics. The difference tone in low frequency and musical sound.