Hi ,
Bass Treble is located in Coimbatore , you can contact Dev @ 09894018283 , I dont know the full address , just give him a call or drop a message and yes he authorized for Marantz Products.
Mohan.
Before I emailed BassT a cheque, I called the two Regional Managers for Distie Refex Pro in Chennai (Mr. Aldrin & Ms. Corina) and confirmed that BassTreble is Auth. Dealer. They assured me that I would get service from Marantz auth. service centre with original parts only (2 yrs warranty) ... in worst case scenario of a problem.
Regards