Sophia Electric 91-01 300B Monoblock Tube Power Amplifiers; Pair

Sophia Electric

Sophia Electric 91-01 300B Monoblock Tube Power Amplifiers; Pair

$2,870.01

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+ $80 Shipping to contiguous US
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Current stock: 1

Sophia Electric 91-01 300B Monoblock Tube Power Amplifiers Highlights

Product: Sophia Electric 91-01 300B Monoblock Tube Power Amplifiers; Pair

Product SKU: 66492

Serial Number: 001935, 001936

Input Voltage: 120V

Cosmetic Description: Very good condition with minimal visible cosmetic wear including some nicks and scuffs on the top edges of both chassis, and light scuffs and scratches on the top surfaces of the transformer housings. These blemishes are not readily visible from your listening position, and do not detract from the overall wonderful appearance.

What is Included: Pair of mono amplifiers, Two Shuguang 300B tubes, Two Sovtek 5AR4 tubes, Two PSVANE 6SN7 tubes, Pair of power cables, Factory packaging

Functional Notes: Operational condition of this item is excellent, fully tested and no issues found.

Age: 3 Years

# of Owners: 1

Tobacco Exposure: No

Service History: None

MSRP: $5995

Other Notes: Less than 1000 hours on tubes per original owner.

"The Sophia Electric 91-01 300B is a single-ended power amplifier designed around the 300B directly heated triode tube, operated without negative feedback. Its input/driver tube is a Chinese-made 6SN7 dual-triode, implemented not in the rather common series-regulated, push-pull (SRPP) mode, but rather, according to Richard Wugang, in a manner that "allows enough voltage swing for the 300B to deliver 8W." According to Wugang, an SRPP arrangement "has some advantages, but it sounds too aggressive." The precise details of the 91-01's input circuit were kept from me by a smallish input-circuit board, containing four capacitors and seven resistors, that obscured from view the socket for the 6SN7 and much of the pertinent wiring." - Stereophile

Product Specifications

Reviews: Review 1

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