Apt Holman Power Amplifier APT-1 Serial # 04645 100WPC Perfect Working Condition For Sale

The APT Holman APT-1 is a vintage stereo power amplifier designed by Tom Holman in the late 1970s–early 1980s known for its high performance and conservative design.

Key Specifications

• Power Output: 100 watts per channel into 8 Ω (stereo), 175 W into 2 Ω, 75 W into 16 Ω; in mono bridged mode, 200 W into 4 Ω or 8 Ω.

• Frequency Response: 1 Hz to 30 kHz (some sources list 10 Hz to 30 kHz with ±0.25 dB tolerance)

• Total Harmonic Distortion (THD): ≤ 0.03% into 4 Ω or 8 Ω; ≤ 0.05% into 2 Ω

• Damping Factor: ~200 (into 8 Ω)

• Input Sensitivity: 0.925 V (1 W output) or 90 mV (1 W output) depending on source

• Signal-to-Noise Ratio: 80 dB below rated output

• Speaker Load Impedance: 4 Ω to 16 Ω

• Dynamic Headroom: 3 dB at 8 Ω, 2 dB at 2 Ω

• Reactive Load Rating: 3 dB

• Capacitive Load Rating: Up to 0.8 µF

• SMPTE IMD: < 0.01%

• Slew Rate: > 10 V/µs

• Dimensions: 87 mm (H) × 429 mm (W) × 265 mm (D)

• Weight: 10 kg (22 lbs)

• Perfect Working Condition.