Akai AA-R20

Little is documented about the Akai AA-R20. The one solid sighting in the available record is High Fidelity (1980, p.82), which lists the Akai AA-R20's frequency response as 20 Hz to 20 kHz within ±1 dB. The surviving digitized fragment of that survey table preserves the Akai column — the same page that carried the Advent receiver entries — with these figures:

Frequency response: 20 Hz–20 kHz, ±1 dB
Phono sensitivity: 3/6 mV
High-level sensitivity: 120 mV
Phono overload: 75/150 mV

Beyond that listing, the record is essentially silent. No production years, power output, original price, or design details have surfaced in the documentation gathered so far. If a manual or a cleaner scan of that High Fidelity page turns up, it would fill a genuine gap.