Pioneer Spec-4

Send

Brand: Pioneer

The Pioneer Spec-4 is a classic integrated amplifier that was first introduced in the mid-1970s. This particular model, designated as the Spec-4, was part of Pioneer's Specialty Component Series and is considered a high-end product in its lineup.The Spec-4 features a clean, minimalist design that reflects the functionalist aesthetic popular in the era. It uses a direct coupled input stage with no coupling capacitors, which helps to maintain an understated, linear signal path. The power amp stages use Pioneer's own proprietary "Spatial Sound" circuitry, which is said to improve the soundstage and imaging capabilities.The Spec-4 is widely regarded as a dogma-shattering amplifier in the sense that it delivered a transparent, true-to-life sound that was not colored by any artificial ‘upfrontness’ or character that was common in audio components of that era. The Spec-4 remains highly regarded even to this day, with many audiophiles considering it a benchmark for neutrality and naturalness.In terms of technical specifications, the Spec-4 puts out 45 watts per channel into 8 ohms with a THD+N measure of less than 0.5%. The input sensitivity is 200mV for line and 15mV for Phono, and the dimensions are 444 x 141 x 347mm (this includes the fins on the sides for heat dissipation). The unit came in a black or silver finish.In summary, the Pioneer Spec-4 is a highly revered classic amplifier, known for its neutral, detailed sound, clean design, and exceptional technical specs. It remains a sought-after piece by audiophiles and continues to inspire new generations of audio engineers.

Power Output: 150W into 8Ω (stereo)
Frequency Response: 5Hz to 100kHz
Distortion: 0.01%
Damping Factor: 100
Speaker Impedance: 4 to 16Ω
Input Sensitivity: 1V
Signal to Noise Ratio: 115dB
Dimensions: 480 x 187 x 445 mm
Weight: 24.5 kg
Year:
Price: