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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

Preamplifiers


Total 104 Items.

"The six senses" 101D/71A Preamp, LCR phono tube preamplifier

LCR tube preamp with using 101D tube in output stage. Phono is LCR block.
  • NEW
  • Recommendation

300B tube amplifier preamp, buffer preamp using 417 driver tube

Preamp tube amplifier using ouput transformer, 300B was used for output tube. Recitifier tube is 5U4, driver tube is 417A.
  • NEW
  • Recommendation

DAC, USB decoder tube amplifier buffer preamp (power amp) using VT-62/801A tube

Sales price: $ 2,350(Listing price is for payment via Paypal, discount 2% if payment via bank transfer)
DAC, USB decoder using VT-62 tube for ouput, transformer was used for output. It can be used as DAC preamp as well as power amp (7W of output power). Recitifier tube is 5Y3, driver tube is 396A.
  • NEW

VT-52 tube SE amplifier stereo, driver tube 71A, 101D

VT-52 power amplifier, driver tube 71A, can be used 101D without modify or adjustment. Output power is 4.5W(8 ohm ) or 8.5W(16ohm). very beautiful and rich sound.
This product is currently sold out.
  • NEW
  • Recommendation

DAC, USB decoder tube amplifier buffer preamp (power amp) using 211/845 tube

DAC, USB decoder using 211/84 tube for ouput, transformer was used for output. It can be used as DAC preamp as well as power amp (6W of output power). Recitifier tube is 6AX4 x 2, driver tube is 396A.
This product is currently sold out.
  • NEW
  • Recommendation

[ONLY ONE] Tube preamp with phono stage with 30s year Thordarson output transformers

Sales price: $ 2,850(Listing price is for payment via Paypal, discount 2% if payment via bank transfer)
Only one was made. Preamp with phono amp stage, output transformer is Extra rare 30s year Thordarson output transformers. Sound is nearly same as Western style sound.

Special order made 300B/PX25 Preamp, buffer amplifier wenge wooden case

Tube preamp with using 300B tube in output stage with Wenge wooden case. 3 inputs and one output RCA.
  • NEW
  • Recommendation

DAC, USB decoder tube amplifier preamp (power amp) No NFB class A

DAC, USB decoder using 717A/42 tube for ouput, output transformer is Western Electric. Beautiful sound. Rectifier tube is 80 tube.
  • NEW
  • Recommendation

[ PROTOTYPE SALE ] LCR phono preamp with separated power supply

LCR phono tube preamp with 6Dj8 x4. This is prototype version. 6V6 tube was used for regulator voltage to power supply. There is no volume control.
  • NEW

MM phono preamp CR type with NP-216 ouput transformer * ALL tubes are 396A, 6V6 tube for regulation

Special order made phono stage preamplifier. Using We396A, 5670 in phono stage and output stage. Highest quality parts was used for the best sound ever.
  • NEW
  • Recommendation

REN904 DAC tube amplifier using ES9038Pro dual for USB, Bluetooth, CD

DAC decoder using ES9038 Pro chip, output tube is REN904. Output impedance is 600ohm. Can be use with USB, Bluetooth, CD.
  • NEW
  • Recommendation

Marantz CD-60 CD player modify using tube for DAC Philips TDA1541A

Marantz CD-60 CD player modified using tube for DAC decoder using Philips TDA1541A chip. Output tube is E82CC(6DJ8), output impedance is 600ohm.

LCR tube preamp with separated power supply, regulator voltage 300B

LCR tube preamp with 6Dj8 and ECC82 tube. Tone control function with bass, treble and tone defeat. 300B tube was used for regulator voltage to power supply.

Special order made PX4 Preamp, buffer amplifier

Tube preamp with using PX4 tube in output stage with REN904 tube ( can be changed to REN1004). 2 inputs (RCA, XLR) and output RCA.
  • NEW

10Y/VT-62 tube SE preamp, buffer amplifier

Special order made preamp, can be use both VT-62 and VT-25A, 10Y and 801A. No prestage tube was used, only VT62 to get pure sound of VT62.
  • NEW
  • Recommendation

45 DAC tube amplifier using Philips TDA1541A on Wooden board

DAC decoder using Philips TDA1541A chip, output tube 45, using oil con, all best part ever.