Crown D 45 (1980–1985)

The Crown D 45 is a stereo power amplifier that Crown International built from 1980 to 1985. Studio Sound (June 1995, p.13) noted the introduction of the D-45 alongside the D-75A. It's a plain, no-frills pro amp from the Crown D series, rated at 110W RMS per channel into 8 ohms and 155W into 4 ohms. It's a Class AB design in a 3U-high chassis - 19" × 5¼" × 9" - and weighs 24.5 lbs. An internal fan handles cooling.

The front panel is brushed aluminum with left/right volume knobs, a power switch, and power and clip LEDs. The back has gold-plated RCA inputs and a single pair of binding-post speaker outputs. Specs are respectable for the era: frequency response 20Hz-20kHz ±0.1dB, signal-to-noise ratio of 105dB, damping factor of 100, and input sensitivity of 1.5V. A relay-based protection circuit guards the speakers.

Owner impressions are generally positive. One Audio Database summary calls the sound "clean, powerful sound" with "detailed highs and punchy bass," and build quality gets consistent praise. Two complaints come up. The fan gets noisy at high volume, and the protection relay can fail after many years of use, which is a common age-related issue in amps of this vintage.

No original price is documented, and there's little historical context on where the D 45 sat in Crown's lineup relative to its siblings.