Rotel 840BX

Documentation on the Rotel 840BX is thin. No complete spec sheet or production history survives in the archive. What the record shows comes from a period review and reprints of Rotel's own advertising. Together they establish the essentials: the RA-840BX (the full model name) was the more powerful integrated amplifier in Rotel's BX series, positioned above the RA-820BX.

High Fidelity (October 1985, p.57) reviewed the RA-840BX alongside the smaller RA-820BX. It measured roughly 56 watts per channel into 8 ohms at 1 kHz at clipping, both channels driven. That is a clear step up from the 40-watt-class RA-820BX. Rotel's advertising made a lot of the model's reception. Ads in Audio (June 1986, p.43) and High Fidelity (November 1986, p.69) carried a "What Hi-Fi? Awards winner 1985" badge for the RA-840BX.

Known specifications:

Type: Integrated amplifier (RA-840BX)
Measured output: approximately 56 W per channel into 8 Ω at 1 kHz, both channels driven
Position in range: above the RA-820BX
Recognition: What Hi-Fi? Award winner 1985 (per Rotel advertising)

Production years, original price, and deeper technical details are not documented in the available sources.