Sophia Electric 91-01 Heritage 1 MonoBlocks I have owned these Hi-End Quality SE Mono Blocks since 2014.
These units have been taken care of epically. All tubes you see in the photos are Sophia Electric. But are NOT INCLUDED with this sale. If you wish to purchase these tubes with the units, there w/b a additional charge of 750.00 charge. (2) SE 300B Royal Princess) (2) SE Aqua 274B) and (2 SE 6sn7) 1800.00 Retail.
I will include the Original NOS 5UA rectifier Tube and 6sn7 tubes.
Sophia Electric level one -- Heritage Series
SE level one 91-01 amplifiers use the traditional circuit design and execution.
This is Sophia Electric’s 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 today’s 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.
Designed by Dr. 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.
Sophia Electric 300B Mono-block Single Ended Tube Amplifier Specification
Design: 9 watts output single ended 300b amplifier per mono-block with no negative feedback.OPT Transformers:Sophia Electric designed and in house made output transformers featuring mixed vintage (WE) core and modern high tech core for sound and ultra specifications. Pure OFC copper wires are being used. Potted. Power transformers: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.Input Sensitivity:500 mv Input Impedance:200K Frequency Range:12 Hz – 35 KHz +/- 3 dB Residual Noise/Hum: Standard version:> 2.0 mvDistortion: -0.18% at 1 watts at 1KHz Weight 35 pounds per channel.
(My Units are wired for AC Power:120V60Hz (USA) Units w/b packed in all Sophia Electric original boxes when shipped. And fully Insured for the final selling price.