Onix OA 30- anyone got or had one?

[mr neds]

Hi all. Got a bit confused on The Bay and bought a possibly working Onix OA 30 amp. Mercifully, it turned up in a fully functioning state. I opened the lid to check for damage and there doesn't seem to be much in there- one board and a decent sized transformer. It seemed to take a couple of days to open up, but I'm damned if I know what it's doing! It seems "right" in many ways- not as bright as my Arcam, which means that reverb/detail  is curtailed, but not in a flat boring way. It cost me just under £70. Is it worth a service? I imagine the cost would be uneconomical, as it doesn't seem to be an Onix classic, like the OA21. Any opinions or advice would be appreciated

Cheers

Neds