Pure OFC copper wires are being used. Using the same high end core materials and winding method, one 220W power transformer per channel for AC consumption of 75w per channel x 2. 12 Hz - 35 KHz +/- 3 dB.0.18% at 1 watts at 1KHz. 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. This is Sophia Electrics effort to reproduce a vintage legendary design and sound with Sophia Electric characters: different driver tubes and different transformers at different B+ Voltage for a sonic performance and testing specification (wider bandwidth and quieter S/N ratio) more suitable for todays hi-fi requirement.
This Sophia Electric amplifier was named after the famous Western Electric 91 amplifier. The original WE 91 amplifer used WE310 driver tube that is ultra expensive for what it is and difficult to find today for any meaningful quality production.
Sophia Electric designers choose a driver tube to produce similar sonic characters that WE 91 is famous for. DWU and Richard Wugang, father and son, hand-made in Virginia, USA.Circuit: Single ended 300B amplifier without feedback. Transformers: Sophia Electric 91-01 OPTs designed by Dr. DWU, made in-house by Sophia Electric. The item "Sophia Electric 91-01 mono-block orig 300B tube amp Pair Mint! REDUCED" is in sale since Sunday, June 9, 2019. This item is in the category "Consumer Electronics\TV, Video & Home Audio\Home Audio\Receivers & Amplifiers\Amplifiers & Preamps".
The seller is "gunarajendran" and is located in Henderson, Nevada. This item can be shipped to United States.