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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

Special Order Made


Total 299 Items.
  • NEW

300B stereo tube amplifier class A1, no NFB 8W output

Sales price: $ 1,950(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. Output is 8W. Pure class A1, no NFB is adopted.
  • Recommendation

【Prototype sales】 71A PP tube amplifier, pure class A 2.5W

Sales price: $ 1,450(Listing price is for payment via Paypal, discount 2% if payment via bank transfer)
This is 71A PP tube amplifier of new design, using 717A as driver tube. Output is 2.5W class A, best matching for high sensitive speaker. This is prototype sale, price for new order made is 2000USD.
This product is currently sold out.
  • Recommendation

71A SE tube amplifier with Western Germany OPT, Bluetooth receiver embedded 230V

Sales price: $ 1,250(Listing price is for payment via Paypal, discount 2% if payment via bank transfer)
71A SE tube amplifier with max 1W of power. Can be used as preamplifier, Bluetooth receiver. OPT is 50s year Western Germany, manufactured in WW2 Sachsenwerk. 5842(WE417A) is included.
  • NEW
  • Recommendation

EXRARE 50s year Malotki CD line, input transformer 1:1.2

Sales price: $ 950(Listing price is for payment via Paypal, discount 2% if payment via bank transfer)
Very very rare line CD tranformer manufactured by Malotki. Step up ratio is 1:1.2 . Wiring is Western Electric 50' year.
  • NEW

"The Tesseract 45" SE tube amplifier * Pure class A 2W with Western German OPT Sacksenwerk

Sales price: $ 1,150(Listing price is for payment via Paypal, discount 2% if payment via bank transfer)
Pure class A 45 tube amplifier using 417A(5842) tube as driver tube. Only 2W of output, no NFB adopted. Output is 40s year Western Germany Sachsenwerk.
  • NEW

211 SE tube amplifier class A, driver tube 3A/167M 20W output

It is SE amplifie using 211 tube as power tube. Output is 22W. Prestage tube is C3g, driver tube 3A/167M. High voltage version 1000V with top parts was used. Oil condenser drive in power supply.
  • NEW
  • Recommendation

71A SE tube amplifier (pre amp) Walnut wooden board, Western Electric OPT, output 1W

Sales price: $ 1,350(Listing price is for payment via Paypal, discount 2% if payment via bank transfer)
71A tube preamplifier with drive tube is Western 717A. Output transformer is Western electric KS-8714. Dark vintage sound. 6DJ8, 6V6 was used as voltage regulator, rectifier is 80 tube. Input 230V.
This product is currently sold out.
  • NEW
  • Recommendation

71A PP tube amplifier class A * output 2.5W

71A tube amplifier with drive tube is 396A and 6DJ8. Can order 45, 2A3 tube as replacement of 71A
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211 SE tube amplifier class A, 22W output with walnut wooden case

It is SE amplifie using 211 tube as power tube. Output is 22W. Drive tube is C3g. High voltage version 1000V with top parts was used. Oil condenser drive in power supply.

Final Art Model 808 stereo tube amplifier Shishido IITC all Blackgate condenser

Sales price: $ 5,600(Listing price is for payment via Paypal, discount 2% if payment via bank transfer)
808 is called 300B killer.Special order made based on master Shishido schematic. All transformer are special order made from Hirata TANGO. Output transformer is same as X-3.5S. Max output 15W
  • Recommendation

45/2A3 PP tube amplifier pure class A1 * Prototype version

Sales price: $ 1,900(Listing price is for payment via Paypal, discount 2% if payment via bank transfer)
2A3/45 tube amplifier . All transformers was put inside Wooden box. This is prototype version, all transformers are LUX. Amplifier has 3 blocks with separated power supply.
This product is currently sold out.
  • NEW
  • Recommendation

Attenuator transformer for speaker 200Hz~

Sales price: $ 700(Listing price is for payment via Paypal, discount 2% if payment via bank transfer)
Speaker attenuator transformer, 12 steps
This product is currently sold out.
  • NEW
  • Recommendation

C3g-71A tube pre-amplifier, Wenger wood case, voltage regulator 6DJ8-6V6

71A tube preamplifier with drive tube is C3g. Output tube can be changed to VT-25, VT-52, 45, 50 tube. Luxury Wenger wooden case.
  • Recommendation

【Prototype sales】 Only 1 limited 45SE tube amplifier amp with Jorge Schou OPT, West Electric wire

Sales price: $ 1,385(Listing price is for payment via Paypal, discount 2% if payment via bank transfer)
This is 45SE tube amplifier of new design, using C3g as driver tube. There is only one available because it is impossible to get Jorge Schou transformer again. No NFB schematic, pure sound of 45.
This product is currently sold out.
  • NEW
  • Recommendation

"The Tesseract" 417A-2A3 SE prototype tube amplifier 3W output * All transformer are LUX

Sales price: $ 1,500(Listing price is for payment via Paypal, discount 2% if payment via bank transfer)
2A3 tube amplifier with drive tube is 417A. Output is 3W. All transformers was put inside Wooden box. This is prototype version, all transformers are LUX. Deluxe Walnut box 30mm thick was adopted.
This product is currently sold out.
  • NEW
  • Recommendation

Finemet attenuator transformer for speaker SA-300 200Hz~

Sales price: $ 650(Listing price is for payment via Paypal, discount 2% if payment via bank transfer)
Special order made speaker attenuator transformer. Finemet core was used, very very good quality sound.
This product is currently sold out.