Originally Posted by Technic
There should not be any connector cut, otherwise the DA2 would not have been working at all. It requires the MOST connector as is. In the worst case it may be missing a MOST jacket which you can get at the dealer.
Unplug DA2 and connect OEM amp back. The dealer is correct.
just to make sure we're talking about the same type of amp. here is a picture of the connections I am referring to vs the more typical optical cable running into the da2.