Acoustic Research 200-W
Little is documented about the Acoustic Research 200-W power amplifier. What the record shows comes from a pair of HiFI-Stereo equipment listings from the early 1990s. The first, from 1993, lists a "200-W/ch Amplifier" at $1,295 with a claimed slew rate of 500 V/µs, noise of 2 mV, and total harmonic distortion of 0.005%. It weighed 45 lb and measured 17 × 7½ × 14½ inches. A second HiFI-Stereo listing from February 1994 calls it a "Limited Model 200" - likely the same unit. That one specifies 200 watts per channel RMS into 8 ohms at 0.2% THD, with a switchable Class AB design, a brass-bar main ground bus, and multiple output transistors. The 0.005% figure in the earlier listing may be an optimistic rating or a different measurement condition. Nobody knows which.
Beyond these catalog entries, no further specifications, design details, production years, or original documentation have surfaced. The 200-W appears to have been a relatively short-lived offering in Acoustic Research's amplifier line, possibly a limited-run model.
- Power output: 200 W × 2 RMS into 8 ohms
- THD: 0.005% (1993 listing) / 0.2% at rated power (1994 listing)
- Slew rate: 500 V/µs (1993)
- Noise: 2 mV (1993)
- Dimensions: 17 × 7½ × 14½ inches
- Weight: 45 lb
- Price: $1,295 (1993)
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