Type: Mono tube power amplifier. W per channel, Class AB2 using the ECL82 (6BM8) tube in push-pull/ultra-linear mode. Input Sensitivity & Impedance: Approx. MV for full output, 100? Tubes lifespan: Recommended replacement every 5-7 years (or 3 years with constant use).
Positive-Feedback (2000) - Francisco Duran. An enthusiastic review of the Zero system, including the P-Zero amps. Please note one amp led is not coming on but they work as intended.Praised for balanced tone, detail, and musical engagement across a mix from Metallica to Muddy Waters. Minor concerns: binding posts can loosen, and RCA inputs are tightly spaced. Hi-Fi Choice / TechRadar - Zero System. Describes the sound as "gorgeously smooth and richly detailed, " with impressive clarity and immediacy.
Notes that with efficient speakers (93? DB), the limited power isn't an issue-can still drive as loud as we would ever want.