OTOMON Laboratory　(音門ラボ) / 45/2A3 PSE tube amplifier pure class A1 * No NFB * Prototype version

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45/2A3 PSE tube amplifier pure class A1 * No NFB * Prototype version

We can provide power transformer which use for 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 !!!

YouTube channel > Otomon Lab YouTube Channel

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45/2A3 PSE tube amplifier pure class A1 * No NFB * Prototype version

THIS ITEM WAS SOLD OUT. If you want the same one, you can order me to get the same one.

Manufacturer:: OTOMON Lab

Audio amplifier » Tube amplifiers Audio amplifier » Special Order Made

2A3/45 PSE tube amplifier prototype version. Amplifier has 3 blocks with separated power supply.

This use EF86 as first stage tube, 5687 as driver tube, rectifier tube is 5U4, GZ34 or 5R4GW.

It is now 100V but can be changed to 117, 230V. If you want to change to 117 or 230V, need to wait about 1 month.

This is prototype so price is cheaper than order made. If you saw this item is sold out. The same order one will cost 2700USD.

Why do the prototype products are cheaper than order made ?
Because it use vintage transformer, not new transformer.

Input volt is 100V, if you want to change to 117V or 230V, you need wait for 1 month.

This is perfect amplifier with power tube 45 ( can be change to 2A3) and prestage tube EF86, driver tube is 5687. Output power for 45 tube is 6W. It is really amazing amplifier with sweet and musical sound and wide range of sound stage.

I will include EF86, 5687x 4 as gift, all other tubes are not included.

Specification:

Response frequency: 16Hz ~ 50K Hz(-1db)
Output power : 6-8W
Distortion: 0.3% 1W 8Ω

Fixed bias, there is bias adjuster volume and DC meter check, you can see meter and adjust bias to proper value.