Very cool looking clean Philips receiver. Original condition. No STK module, really discrete amp. All lamps are new. Bias set correct Contact cleaned Very nice Stereo FM reception. Off coarse with phono input. Connectors for 2 speaker pairs. Including 2 din speaker plugs with screw connection. it's in excellent condition in my opinion. The 22AH603 is a popular mid-range receiver with an amplifier power of 2x 40 Watts 8 Ohm Or 2x 50W at 4 Ohm Big heatsink on the back. The FM tuner has the option of storing five preset stations. The large, illuminated tuning scale allows tuning to any station. There is the option of connecting 2 Tape or Aux devices and a record player. The 603 can drive up to four speakers and there is a connection for MFB speakers. 45x34x10 cm 10Kg Year of manufacture: 1980 Reception ranges MW: 520 to 1605 kHz PHILIPS Manufacturer LW: 150 to 345 kHz Number of preset buttons 5 Distributor PHILIPS Signal strength, center of ratio Tuning indicators Integrated receiver, stereo preamplifier, and power amplifier Function FM: 75 Ω coaxial, 300 Ω DIN balanced Antenna inputs Input sensitivity Signal-to-noise ratio: 26 dB: 0.9 µV at 75 Ω mono Amplifier Phono MM: 2.5 mV (47 KOhm) Inputs Stereo input sensitivity Band 1 150 mV (500 KΩ) Band 2: 150 mV (500 kΩ) 1.0 min Limiter (-3 dB) DIN: 0.3 mV/KΩ Bandaufnahme 20 Hz to 15 kHz (-3 dB) Frequency response (-3 dB) RCA: 150 mV into 2.5 ΚΩ 0,25% Clarity Phono equalization RIAA Signal-to-noise ratio Sine wave power (f=1 kHz) 2 x 37 W an 8 Ω Mono: 75 dB, Stereo: 70 dB Music power Crosstalk attenuation 38 dB 0.025% at 30 W Clarity Pilot tone attenuation 60 dB (19 kHz) 0.08% at 30 W Intermodulation Selectivity (±300 Hz) 62 dB Power bandwidth 10 Hz to 40 kHz IF attenuation 75 dB 20 Hz to 20 kHz (± 1.5 dB) Overall frequency response Image attenuation 42 dB Signal-to-noise ratio, referenced to full output Co-frequency selectivity 2,5 dB Low-level inputs: 70 dB High-level inputs: 85 dB Signal-to-noise ratio, referenced to 2 × 50 mW Dimensions (W x H x D in mm) 482 x 102 x 347 Speakers: 2 × 2/8 Ω (DIN) Outputs Weight 7,5 kg Headphones: 8 x 600 Ω (1/4" jack) Non-binding, Bass at 50 Hz: ±14 dB Approximate retail price Tone controls Treble at 10 kHz: ±14 dB Acoustic response Carefully shipped