Pioneer - SX-450 Solid state stereo receiver

The Pioneer SX-450 is a 15-watt-per-channel FM/MW stereo receiver with FM muting, a tape monitor switch, and provision for 2 pairs of speakers. The unit uses an OCL circuit with direct coupling in the power amplifier with a first-stage differential amplifier. The high FM sensitivity is ensured by a low-noise FET in the front end with a 3-gang variable capacitor tuned in frequency. The SX-450 is equipped with numerous manual controls, including tone controls for bass and treble.

Build quality is very solid. Considering its age, this SX-450 looks excellent, helped by the two side panels that have been refurbished. The original selling price of the SX-450 was $200 in 1976, the year of manufacture. By Pioneer Audio's own admission, the SX-450 was an entry-level stereo processor—sound much the same in their own advertising campaigns at the time.

From a sonic standpoint, the SX-450 is impressive. It has an overall very pleasant timbre, which pairs well with a wide variety of speakers. The Pioneer SX-450 will be meticulously packaged and shipped insured. Please study the photos carefully to avoid any misunderstandings.

Technical specifications

Tuning range: FM, MW

Output power: 15 watts per channel into 8Ω (stereo)

Frequency response: From 20 Hz to 60 kHz

Total harmonic distortion: 0.5%

Damping factor: 25

Input sensitivity: 7.5 mV (microphone), 2.5 mV (MM), 150 mV (line)

Signal-to-noise ratio: 70 dB (MM), 90 dB (line)

Output: 150 mV (line), 30 mV (DIN)

Speaker load impedance: 4Ω (minimum)

Semiconductors: 1 x FET, 3 x ICs, 28 x transistors, 15 x diodes

Dimensions: 448 x 141 x 307 mm

Weight: 8.6 kg

Accessories: FM antenna type T

Year: 1976