Sophia Electric 845 Output Transformers for 845 Single Ended Amplifiers
845 tube is the most respected high end tube and the most powerful in single ended operations without going for radar tube 833a. However, the technical difficulty in designing and making a good sounding amplifier output 28W of power in single ended operation is much much greater than 300B tube operating at 8W of output. The barrier of entry is the output transformer.
Now you have a chance to buy a pair of the best sounding current production (or ever produced) 845 output transformers to upgrade your existing 845 amplifiers or DIY custom amplifiers. Proven performance as it is being used in Sophia Electric's top of line 845 amplifiers.
Sophia Electric 845-03 and 845-05 output transformers were designed by Dr. DWU and Richard Wugang and made in house by Sophia Electric. Output transformer winding method and material choice have the No.1 impact on amplifier sonic characters, thus it is the top secret of tube amplifier making. All Sophia Electric transformers are potted with metal case against humidity and against copycats.
Option 1: $1,200 for one matched pair of Sophia Electric 845-03 output transformers (steel case, potted).
Option 2: $2,000 for one matched pair of Sophia Electric 845-03 output transformers, signature edition (aluminum case, potted).
Option 3: $1,600 for one matched pair of Sophia Electric 845-05 output transformers (steel case, potted).
Option 4: $2,500 for One matched pair of Sophia Electric 845-05 output transformers with exotic wires and exotic core material, signature edition (aluminum case, potted).
Secondary 0-4-8 ohm taps are free. Other impedance (16 ohm, 11 ohm and 6 ohm) is $300 extra for each additional secondary tap.
All Sophia Electric 845 OPT models have been designed and proven of top performance in the series of Sophia Electric amplifiers. Buyer should have peace of mind in buying them. -- All new OPTs have been tested with 2000 voltage for 60 sec. 845-05 OPTs are being used in the current production Sophia Electric 845-05 single ended mono-block 845 amplifiers.
Please read review below about Sophia Electric OPTs::
Positive Feedback Review: "...The Sophia Electric Model 91-01 300B mono amps are audiophile dream amps, they have great sonics top to bottom, bass articulation that is the best I've heard, and the SE 91-01 nails all of the nerdy audiophile things like soundstaging, imaging, sense of space, and transparency in such a beguiling way that even music lovers that don't give a rat's ass about audiophile-type sonics will appreciate its prowess.
I recommend these amps heartily, and I'd give them my normal 'two thumbs up' endorsement, but that just wouldn't capture what these Sophia Electric Model 91-01 300B mono amps are capable of, so I've invented a new rating, the 'two hard nipples up' recommendation, which is the highest award I've given out to date. ..." ––– Jeff Day
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