Dont send your amps to MZ audio service Centre in Mumbai... They don't repair , but replace components and then SQ goes for a toss
PM7001 - it was in protect mode . Repaired / Replaced DAC . Its playing now , but Treble is gone from the sound . Just pure bass
PM8005 - I was a getting a Huge Speaker Thump while switching off the amp . So to protect my speakers , I decided to give it for repair . Again same story , Amp board repaired or replaced and Treble is gone and just loads of bass .
Unfortunately I gave both together .
Not sure , I am assuming he must used some local cheap components instead of using original Marantz . I now have a Marantz PM11S2 which needs to be repaired , but after my exp with MZ , cant go to them and not getting any body else .
So finally got Norge and WIIM Amps (instead of Marantz Model M1) and have decided to stay away from Marantz in future .