Pääteasteen putket vaihdettu kesällä 2025, bias säädetty samalla. Etuasteen putket alkuperäiset.
Vanhat pääteputket mukana vaikka koristeeksi. Kuvasta poiketen päätteen etulevy kullan värinen.
https://www.stereophile.com/content/sonic-frontiers-power-3-monoblock-power-amplifier
Description: Vacuum-tube monoblock amplifier. Tube complement (each monoblock): eight 6550C, four 6922, two 5687. Rated output power: 20Hz-20kHz, 1% THD, 220W into 8, 4, and 2 ohms (23.4, 20.4, and 17.4dBW, respectively). Frequency response: 5Hz-75kHz, ±0.5dB at 1W; 15Hz-60kHz, ±0.5dB at 220W. Input sensitivity for full output power: 2.2V, balanced or single-ended inputs. Voltage gain: 25.6dB into 8 ohms, 22.6dB into 4 ohms, 19.6dB into 2 ohms. Input impedance: 100k ohms single-ended, 200k ohms balanced. Output impedance: 0.25 ohms at 1kHz. Damping factor: >50 (using IHF method from RS-490). Power consumption: 375W at idle, 580W at rated output.
Dimensions: 18″ (460mm) W by 9″ (230mm) H by 22″ (560mm) D. Net weight: 100 lbs (45kg) each.
