ZX600ti ser# 03268368430100

Ok, so I had a customer come in and wanted to get rid of some old school gear. Need a little info on this bad boy if anyone has any. He came in with an alpine MRV-F353 amp. A pair of Eclipse 8812’s in the 8 ohm variety and this ZX600ti. Now the zx is the kicker, I’ve NEVER seen an amp with this pain...