Crown D150A (1975–1985)
A solid-state stereo power amplifier built in the USA with high power output and precision IOC design.
Overview
The Crown D150A is a dual-channel solid-state power amplifier manufactured by Crown International Inc. in the USA between 1975 and 1985. Designed for both professional and high-fidelity audio use, it delivers high power with extremely low distortion. It features Crown's IOC (Input/Output Comparator) indicator system, which monitors amplifier performance for precision operation. The unit was also sold under the Amcron/Crown brand and is noted as a medium-power workhorse suitable for stereo and biamped setups.
Specifications
| Power output | 80 watts per channel minimum RMS into 8 ohms (both channels operating) |
| Frequency response | 3Hz to 100kHz |
| Total Harmonic Distortion | less than 0.1% THD |
| Input Sensitivity | 1.19 volts ±2% for 80 watts into 8 ohms |
| Output Signal | Unbalanced, dual channel |
| Dimensions | 17"W x 5.25"H x 9"D (483mm x 133mm x 222mm) |
| Weight | 22 lbs (10.9 kg) |
| Warranty | 3 years from date of original purchase |
Design
The D150A is a solid-state stereo power amplifier designed for precision, featuring unbalanced dual-channel output and IOC (Input/Output Comparator) monitoring. Service manuals include detailed illustrations, parts lists, and technical instructions for disassembly and repair, intended for use by experienced technicians.
Product Family
The Crown D150A is part of a series that includes the "D150A Series II" and the variant model D150AS. It follows the legacy of earlier Crown amplifiers like the D150, which brought professional-grade performance to smaller audio applications.
Market
Listings indicate units are sold as working, for restoration, or for parts, with one noted as needing recapping due to distortion. Documentation including the owner's manual and service manual is available, and restoration services offering a full 30-point check are documented.
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