OTOMON Laboratory　(音門ラボ) / GM70 SE tube amplifier drive tube 2A3, class A1 stereo 28W output (O.U.D.D.C) Zero NFB

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GM70 SE tube amplifier drive tube 2A3, class A1 stereo 28W output (O.U.D.D.C) Zero NFB

You can order input voltage 117V, 220V, 230V, 240V.

I dont open information about schematic, parts, transformer using in my amplifier. My brand name is the guarantee to what I do with my production !!!

For all item on eBay, I will discount 10% or more of listing price, contact for more detail.

YouTube channel > Otomon Lab YouTube Channel

GM70 SE tube amplifier drive tube 2A3, class A1 stereo 28W output (O.U.D.D.C) Zero NFB

This product is special order made item, if you want the same item, please contact me for order

Manufacturer:: OTOMON Lab

Audio amplifier » Tube amplifiers Audio amplifier » Special Order Made

It is special order made SE amplifie using GM70 tube as power tube. Output is 28~30W. Driver tube is 2A3, using O.U.D.D.C in driving power tube.

Driver tube is 2A3, prestage tube is 417A. No NFB (switch let customer use NFB -3db, very little for another music enjoy)

Plate voltage 1000V, current 90mA.

Very wide range, rich and beautiful 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 28W of power. This is impossible thing as using interstage transformer to drive triode tube. I used the same output transformer in schematic using interstage transformer, at 28W, from 20Hz to 60Hz, it drops 3.5db.

Specification: No NFB mode

Output : 28~30W.
Noise : under 1mV
Response frequency:
20Hz~35K Hz ( flatted ) at 28W
16Hz ~ 55K Hz(-1db)
Distortion: 0.2% 1W 5% 28W

Can be match with almost speaker, and all genre of musics. Detail and Powerful sound, very rich of low frequency with musical sound.