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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

Special Order Made


Total 388 Items.
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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)
  • Recommendation

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)
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.


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【Prototype sale】300B drive 300B stereo tube amplifier class A1, no NFB 9W output (O.U.D.D.C)
  • Recommendation

【Prototype sale】300B drive 300B stereo tube amplifier class A1, no NFB 9W output (O.U.D.D.C)

Sales price: $ 3,500(Listing price is for payment via Paypal, discount 2% if payment via bank transfer)
It is stereo SE amplifie using 300B tube as power tube. Driver tube is 300B. Pure class A1, Zero NFB. Price in case you see this amp is sold out is 4500USD plus shipping fee, tubes are not included


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71A/101D drive VT-62/VT-25/10Y SE monoblock tube amplifier 8W power Zero NFB (O.U.D.D.C)
  • NEW
  • Recommendation

71A/101D drive VT-62/VT-25/10Y SE monoblock tube amplifier 8W power Zero NFB (O.U.D.D.C)

This is VT-62 tube amp that adopted circuit O.U.D.D.C, and it is exactly the best VT-62 tube amp that I made.


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71A drive PX4/PX25 stereo tube amplifier class A1, no NFB 5~12W output (O.U.D.D.C)
  • Recommendation

71A drive PX4/PX25 stereo tube amplifier class A1, no NFB 5~12W output (O.U.D.D.C)

Sales price: $ 3,700(Listing price is for payment via Paypal, discount 2% if payment via bank transfer)
It is stereo SE amplifie using PX4/PX25 tube as power tube. Driver tube is 71A. Pure class A1, Zero NFB. Price in case you see this amp is sold out is 4300USD plus shipping fee, tubes are not included


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Attenuator transformer Hirata TANGO GA-300 for speaker 200Hz~ wiring LC-OFC
  • NEW
  • Recommendation

Attenuator transformer Hirata TANGO GA-300 for speaker 200Hz~ wiring LC-OFC

Speaker attenuator transformer, 12 steps. Transformer is orient cutting core. All wiring inside is LC-OFC
This product is currently sold out.

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71A drive 300B stereo tube amplifier class A1, 8.5W output Zero NFB
  • NEW
  • Recommendation

71A drive 300B stereo tube amplifier class A1, 8.5W output Zero NFB

It is stereo SE amplifie using PX4 and 300B tube as power tube. Output is 8.5W. This amp can be used with PX4 and 300B UX4 socket. 3mm thick copper top plate and walnut wooden case.


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71A drive 300B stereo tube amplifier class A1, no NFB 10W output (O.U.D.D.C)
  • Recommendation

71A drive 300B stereo tube amplifier class A1, no NFB 10W output (O.U.D.D.C)

Sales price: $ 2,950(Listing price is for payment via Paypal, discount 2% if payment via bank transfer)
It is stereo SE amplifie using 300B tube as power tube. Driver tube is 71A. Pure class A1, Zero NFB. Price in case you see this amp is sold out is 4000USD plus shipping fee, tubes are not included


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EL-84 PP tube amplifier amp 4 blocks * Output 9W
  • Recommendation

EL-84 PP tube amplifier amp 4 blocks * Output 9W

EL-84 PP tube amplifier, output power is 9W. Price for this amplifier is 1250USD. Tubes are not included.


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71A drive 2A3 SE tube amplifier 5W power Zero NFB (O.U.D.D.C)
  • NEW
  • Recommendation

71A drive 2A3 SE tube amplifier 5W power Zero NFB (O.U.D.D.C)

This is 2A3 tube amp that adopted circuit O.U.D.D.C, and it is exactly the best 2A3 SE tube amp that I made.


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211 PSE tube amplifier Zero NFB, output 45W/channel
  • NEW

211 PSE tube amplifier Zero NFB, output 45W/channel

Sales price: $ 11,500(Listing price is for payment via Paypal, discount 2% if payment via bank transfer)
Special order made amplifier, using 211 single end Parallel connection of 2 x 211 tube in one channel. Output is about 40W per channel, it can drive any speaker with excellent sound.


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Audio Note Kondo Ongaku replica 211 SE tube amplifier with ALL Hirata TANGO
  • Limited edition

Audio Note Kondo Ongaku replica 211 SE tube amplifier with ALL Hirata TANGO

This amp was made based on the schematic that Master Kondo of Audio Note Japan introduced in 1990/8, name of this model is Ongaku, which become a legend from then. Now it is sold at price 150000USD.


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71A/101D drive VT-62 SE tube amplifier 7W power Zero NFB (O.U.D.D.C)
  • NEW
  • Recommendation

71A/101D drive VT-62 SE tube amplifier 7W power Zero NFB (O.U.D.D.C)

This is VT-62 tube amp that adopted circuit O.U.D.D.C, and it is exactly the best VT-62 tube amp that I made.


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Attenuator transformer Hirata TANGO GA-300 for speaker 200Hz~ wiring LC-OFC
  • NEW
  • Recommendation

Attenuator transformer Hirata TANGO GA-300 for speaker 200Hz~ wiring LC-OFC

Speaker attenuator transformer, 12 steps. Transformer is orient cutting core. All wiring inside is LC-OFC
This product is currently sold out.

View product details»
Attenuator transformer for speaker 300Hz~ wiring LC-OFC
  • NEW
  • Recommendation

Attenuator transformer for speaker 300Hz~ wiring LC-OFC

Speaker attenuator transformer, 12 steps. Transformer is orient cutting core.
This product is currently sold out.

View product details»
Audio Tekne 300B PP TM-8501 Super Permalloy core Western Electric 300B tube
  • Recommendation

Audio Tekne 300B PP TM-8501 Super Permalloy core Western Electric 300B tube

Audio Tekne 300B PP TM-8501 Super Permalloy core Western Electric 300B tube. This is the best amplifier of Audio Tekne, all trans are using super permalloy core.
This product is currently sold out.

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Audio Note Kondo Ongaku replica 211 SE tube amplifier with ALL Hirata TANGO
  • Limited edition

Audio Note Kondo Ongaku replica 211 SE tube amplifier with ALL Hirata TANGO

This amp was made based on the schematic that Master Kondo of Audio Note Japan introduced in 1990/8, name of this model is Ongaku, which become a legend from then. Now it is sold at price 150000USD.
This product is currently sold out.

View product details»
By price   Recent   Items displayed
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