Accuphase P-4600 Power Amplifier



Envelops you in pure music listening

The Accuphase P-4600 Power Amplifier is a high-end stereo power amplifier designed for the most discerning listener. It boasts a robust build quality, cutting-edge technology, and exceptional sonic performance, and is a true centerpiece for any high-fidelity sound system.

The P-4600 delivers a robust 150 watts per channel into 8 ohms, doubling to 300 watts into 4 ohms. This ample power ensures it can drive demanding speakers with ease, faithfully reproducing even the most dynamic musical passages.

Groundbreaking technology

The Accuphase P4600 power amplifier utilises a sophisticated Class AB design that combines the best of both Class A and Class B amplification for a perfect balance of power, efficiency, and sound quality.

Accuphase employs top-of-the-line components throughout the P-4600, including custom-wound transformers, high-grade capacitors, and meticulously selected transistors. This attention to detail results in exceptional audio clarity and accuracy.

Power amplification section with linear output characteristics

The power amplification stage of the P-4500 features bipolar power transistors mounted directly to large heat sinks for highly efficient thermal dissipation. The devices are configured as a triple Darlington 4-parallel complementary push-pull circuit that is capable of doubling the rated output when the impedance is halved. In other words, it achieves a fully linear power progression of 90 watts into 8 ohms, 180 watts into 4 ohms, and 360 watts into 2 ohms. It can even supply loads as low as 1 ohm with 500 watts of power (music signals). The impressive damping factor of 700 means that the amplifier has ample leeway to drive any kind of loudspeaker.


Continuous Average Output Power: Stereo operation - 500 watts per channel into 1 ohm, 360 watts per channel into 2 ohms, 180 watts per channel into 4 ohms, 90 watts per channel into 8 ohms. Monophonic operation (bridged connection) - 1000 watts into 2 ohms, 720 watts into 4 ohms, 360 watts into 8 ohms. 

Total Harmonic Distortion: Stereo operation - 0.05% with 2 ohm load, 0.02% with 4 to 16 ohm load. Monophonic operation (bridged connection) - 0.05% with 4 to 16 ohm load

Intermodulation Distortion: 0.01%

Frequency Response: At rated output: 20 – 20,000 Hz +0, -0.2 dB. At 1 watt output: 0.5 – 160,000 Hz +0, -3.0 dB

Gain: 28.0 dB (with GAIN selector at MAX) (Stereo and monophonic operation)

Gain Selection: MAX, -3 dB, -6 dB, -12 dB

Output Load impedance: Stereo operation - 2 to 16 ohms. Monophonic operation: 4 to 16 ohms

Damping Factor: 800 or greater

Input Sensitivity: Stereo operation - 1.38 V for rated continuous average output. 0.11 V for 1 watt output. Monophonic operation - 2.76 V for rated continuous average output. 0.11 V for 1 watt output

Input Impedance: Balanced - 40 kilohms. Line - 20 kilohms

Signal-to-Noise Ratio (A-weighted, input shorted): 125 dB (GAIN selector at MAX), 130 dB (GAIN selector at -12 dB) At rated continuous average output

Output Level Meters: -∞ dB to +3 dB (indication in dB and %) Logarithmic scale, with defeat switch, hold time switchable 3 s / ∞

Power Requirements: AC 120 V/230 V, 50/60 Hz (Voltage as indicated on rear panel)

Power Consumption: 94 watts idle. 485 watts in accordance with IEC 60065

Maximum Dimensions: Width 465 mm, Height 190 mm, Depth 427 mm

Mass: 30 kg net, 36.0 kg in shipping carton

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