What is most power vintage amplifier Akai has produced. I heard few in late 80s and they produced very clean rich bass sound. Unfortunately I do not have model information.
I don't have a ready answer for you, but your best bet would be to check the Audio Magazine annual equipment directories found in the October issues (starting 1974; September before then) here. I'd check receivers as well as amplifiers.
For an insurance claim I was working on the late 1990's I had to quote on and replace an Akai power amp that burned in a house fire. Actually, it's what caused the fire. Circa late 70's - something like 200 ~ 250 WPC - silver face with meters.
Akai was best known to most Americans as a tape recorder manufacturer. Their amplifiers and receivers were often spotty in terms of USA availability. Their dealer network who sold the amplifiers and receivers was fewer. Pioneer was a lot more common, in my area we had Service Merchandise which sold them, England Sound in that era, and The Music Box was also a Pioneer dealer to name Knoxville area dealers. Before England Sound, there was another dealer who sold Pioneer in the Knoxville area.
After doing a quick search on Ebay it seems that the only really decent Akai amplifier that I have found is a PS-120M . Everything else looks to be mid fi at best. Not terrible, but nothing to write home about. However, the PS-120M looks like a bit of a beast for sure...
IMO the zenith of Akai's amplifiers were their AM-73 and AM-93 models, sold at the end of the 1980s. I've owned two AM-73 models over the years, but have never seen an AM-93 in person, only in photos. I still own an AM-73 with its matching AT-93 tuner and CD-73 cd player (unfortunately not working). As stated, Akai was known for their tape decks and RTR's. The product from their "Reference Master" line was top notch.
Akai amplifiers were very famous in Asia. I grow up listen to Akai amplifiers. As one the poster mentioned Akai products were not very famous in US. I have seen many Akai amps in action with Pioneer speakers. They have produced very "CLEAN" sound. Everything is hearable separately on volume going above 80% and not like other amps which really get "NOISY" if you go above 80%
The AM-95 was 180 wpc and made at the end of the 80s. The AM-2950 was the biggie of the end of the 70s at 120 wpc.
I have an AM-2450 and I would call it better than mid-fi even at its rated 45 wpc. These are all integrateds.
The PS 200M amp was rated at 220 wpc!
Their receivers didn't seem to reach the peaks that some of the monsters did, but I also have a AA-R50 receiver that is rated at a respectable 62 wpc and you feel all of it.