OTOMON Laboratory　(音門ラボ) / 2A3 PP tube amplifier pure class A1 monoblock x 2 * driver tube 71A * Zero NFB 20W (O.U.D.D.C)

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2A3 PP tube amplifier pure class A1 monoblock x 2 * driver tube 71A * Zero NFB 20W (O.U.D.D.C)

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.

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2A3 PP tube amplifier pure class A1 monoblock x 2 * driver tube 71A * Zero NFB 20W (O.U.D.D.C)

Sales price:: $ 3,980(Listing price is for payment via Paypal, discount 2% if payment via bank transfer)
Shipping fee: $585 (Free shipping fee for all customers have Japan shipping address)

Manufacturer:: OTOMON Lab

Audio amplifier » Tube amplifiers Audio amplifier » Special Order Made

2A3PP tube amplifier. Driver tube 71A x 2. This adopted O.U.D.D.C and absolutely the best 2A3 push pull amp that I have ever made.

Original order price if you see this amp was sold out is 4850USD plus shipping fee, tubes are not included.

(In prototype version all transformers are used one, has small scratches on them. All other parts are new or new old stock )

This is the first Pushpull amplifier that adopted O.U.D.D.C and it is better than any 2A3 PP that I have ever made. Output transformer up to 20W, Zero NFB, pure class A. This is impossible for any 2A3 PP amp that you see in market which has max 10-12w of output (class AB). The Harmonic distortion in this amp is only 3% at 15W and 5% at 20W.

This is new design of 2A3PP tube amplifier, using O.U.D.D.C schematic (Detail here > http://soundgate.net/product/MTQ1MA...highend is bringing the best sound ever for the amp.

Prestage tube is 12AY7 ( can be used with 12AT7, 12AU7, ECC82 ) x 1
Driver stage : 71A x 2
Ouput stage : 2A3 x 2
Rectifier tube : 5U4G. 5U4C, 5AR4, GZ34

All tubes are not included.

Specification: (Zero NFB)

Response frequency: 16Hz ~ 100K Hz(-1db)
Hum level : 0.18mV
Distortion: 0.2% 1W 8Ω

Hybrid bias, you dont need to care any thing every time changing tube.

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