I actually have two Onix integrateds that I'm about to sell. Here is the early history if you aren't familiar with it:
Integrated Amplifiers:
OA20 1981-1982. 75W 6” wide ‘shoebox’ later stretched to 8” to become OA21A. MC or MM phono stage
OA20/2 1985-1988 – 30W integrated amplifier with MM phono stage
OA22 1988-1992 – re layed out with an extra input, still with MM stage
OA22/2 1992 – 1995 – line only version built on OA21S pcb
OA21A-E 1982- 1989. A & B versions were 75W, later versions (C-E) were reduced to 50W
OA21S 1989-1995 (various upgrades during product life) MC, MM or LINE versions
OA30 reboxed OA22/2 in 430mm style case
OA31 1992 – 1996. 430mm wide version of OA21S, early versions with tape record selector
OA32 as OA31 but with tone controls for export, early versions with tape record selector
OA88 higher power version of OA31 – 80W for export
I have an OA32 in great condition. not one scratch on it and I have the original box and literature that went with it. The other one is an OA 22/2 that has a computer box to ship (no phono, but with tape in and out.
If you have interest in either, please let me know. I'm going to do a search to see what they are selling for.