AE Techron / Crown 7550 Power Supply Amplifier

The AE Techron/Crown 7550 is a dual-channel power supply amplifier delivering precision signal amplification from DC to 20 kHz with exceptional distortion and noise performance. Output reaches 90 W minimum per channel into 8 Ω, scaling to 380 W per channel into 4 Ω when both channels are driven, or 180 W bridged mono into 16 Ω. Total harmonic distortion measures 0.1% RMS at rated output, while residual noise remains below 0.130 mV across the 20 Hz–20 kHz band.

Technical Specifications

• Frequency Range: DC to 20 kHz


• Output Power (per channel, single channel): 90 W minimum into 8 Ω; 350 W into 4 Ω


• Output Power (per channel, both channels driven): 265 W minimum into 8 Ω; 380 W minimum into 4 Ω


• Bridged Output (mono): 180 W minimum into 16 Ω


• Total Harmonic Distortion: 0.1% RMS at rated output


• Residual Noise: <0.130 mV (20 Hz–20 kHz)


• Voltage Gain: 20 (26.3 ± 0.3 dB at maximum)


• Slew Rate: 30 V/µs


• Input Impedance: 10 kΩ


• Output Impedance: <0.012 Ω


• Load Impedance for Maximum Power Transfer: 2.7 Ω


• Input Power: 100, 120, 200, 220, or 240 Vac RMS at 47–63 Hz

Key Features

• Patented Input/Output Comparator (IOC) circuitry alerts to distortion exceeding 0.05%


• Bridgeable outputs for single-channel higher-power operation


• Internal protection against shorts, mismatches, and open circuits in voltage mode


• Immunity to flyback distortion with inductive loads


• Controlled voltage output with optional controlled current output


• Multi-function status indicators: green (signal presence), red (clipping/standby), yellow (standby), and amber (power)


• Color-coded dual binding post outputs on 3/4 inch centers

Typical Applications Precision research, development, and industrial testing requiring low-distortion signal amplification and minimal noise performance across audio and subsonic frequencies.

Compatibility & Integration BNC input connectors, 2-lug terminal block with removable shorting strap for ground selectivity, 11-pin radial socket for accessory connections, and 3-wire grounded AC input. USA manufacturing with aluminum chassis for heat dissipation.