22GH925(1966)

The Philips 22GH925 is a compact vintage early solid-state stereo integrated amplifier from the mid-1960s, successor to valve-based models like the AG9016, featuring all-germanium transistor design in a wooden book-shelf case, with inputs for phono (crystal/ceramic), tape, and tuner, known for its simple, reliable construction and pleasant sound after minor modifications.

• Total Harmonic Distortion (THD): 5% at 4W.
• Amplifier Design: All-germanium transistors (12 total: 8x AC126, 4x AD149), 5 diodes (2x BY100, 3x BZY88/C9V1); phase inversion via transformers.
• Inputs: Phono (crystal/ceramic piezo), Tape (in/out), Tuner/Radio (DIN connections).
• Outputs: External speakers (8Ω, DIN), Tape out.
• Controls: Separate bass and treble tone controls, mono/stereo switches, volume.
• Power Supply: AC 110-127/220-240V; operates at 23V (drops below 20V under load), center at 9V.
• Dimensions (W x H x D): 315 x 85 x 210 mm.
• Weight: 2.25 kg.
• Other Features: Wooden teak case with aluminum/black front; requires external speakers; noted for reliability and modifiability to improve sound quality.