QUAD II 22 Quad Tube Amplifier

QUAD Quad
Power Amplifier: QUAD ii x 2 units
Pre-amplifier: QUAD 22

Power on, sound output, and basic operation have been confirmed.
While measurements have not been performed, it produces excellent sound.
Fully maintained at Hi-Fi-do in 2025.
The rectifier tube has been replaced with a RCA 5V4G (see the last photo) from its state in the pictures.

Electrolytic capacitors and film capacitors have been replaced.
100V model.
The thickness, richness, and presence of the sound are all expressed with rich emotion, beautifully reproducing the resonance of the instruments.
The thick, firm mid-low frequencies and the flavorful tone unique to vacuum tubes are particularly impressive.

Main Specifications:
Rated Output: 11-17W (16Ω) at AC100-117V [QUAD22] EF86 x 2, ECC83 x 2, Inputs: PHONO, RADIO, TAPE, W267 x H89 x D148mm, 3.2kg [QUAD2] KT66 x 4, EF86 x 2, 5V4G x 1, 15W + 15W, W321 x H162 x D119mm, 8.2kg/unit

Maintenance Information:
Maintained on 2025.3.23 (Disassembled and rewired AC power cord plug and socket on the blue side, other AC 100-117V operation checks completed (SP impedance: 16Ω wiring)) Maintained on 2024.2.17 (Replaced electrolytic capacitors with 25μF European made (2 x 1 unit), replaced film capacitors with 0.1μF European made (2 x 3 units), replaced resistors with 1W (from 1/2W) (2 x 3 units), repaired crimping of vacuum tube sockets. Replaced vacuum tube sockets with similar items (No. 57078). Replaced contact failure of internal toggle switch (QUAD22). Replaced deteriorated spark killers (2 units). Replaced deteriorated film capacitors (0.5μF, etc.) (8 units). Replaced electrolytic capacitors with European made (4 units). Replaced deteriorated resistors (1W and 1/2W) (6 units). Reduced input for RADIO 1 to CD input (added 1/4W resistors) (4 units). Repaired crimping of RCA jacks. Other operation checks completed (Rated output: 11-17W at AC100-117V, measured at SP: 16Ω). *P/U adapter is AA type. Please use the black terminal for monaural listening.)
Accessories: Instruction manual (copy), power cord