HCA-855A

About the HCA-855A

The Parasound HCA-855A is a 5-channel power amplifier introduced around 1999, designed to provide high current and clean power output for home theater systems. It delivers 85 watts RMS per channel into 8 ohms across all five channels, with a frequency response of 20 Hz to 20 kHz and very low total harmonic distortion of 0.03%. The amplifier features a high damping factor of 800, input sensitivity of 1 V, and a signal-to-noise ratio exceeding 115 dB, ensuring clear and detailed sound reproduction. It is capable of delivering peak current of 30 amps per channel, allowing it to drive demanding speakers effectively. The unit measures 17" wide x 5.25" high x 16" deep and weighs approximately 41 pounds. It is well-regarded for its ability to reproduce explosive transients and deliver intelligible dialogue in movie soundtracks, making it a popular choice for critical listeners and home theater enthusiasts. The amplifier is no longer in production but remains sought after in the used market for its performance and build quality.