Trio A-224 (1958–1959)
Almost nothing is documented about the Trio A-224 beyond a short promotional announcement. It ran in American audio magazines from mid-1958 into early 1959. The text is identical in every appearance. It describes the A-224 as three instruments in one compact chassis: a complete stereo preamplifier and two separate 12-watt power amplifiers, with 24-watt peaks claimed per channel. Word-for-word repetition across multiple titles strongly suggests a paid manufacturer's announcement, not an independent editorial review.
High Fidelity (July 1958, p.24) carried the copy, as did Audio (October 1958, p.51) and HiFI-Stereo (July 1958, p.49). Later placements in HiFI-Stereo (January 1959, p.47) and Audio (March 1959, p.43) show the A-224 still being promoted into 1959. No original price, circuit details or measured performance figures survive in the record.
- Type: stereo amplifier — preamplifier plus two power amplifiers in one chassis
- Output: 12 W per channel; 24 W peak per channel
- Period advertised: 1958–1959
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