I have a Sony receiver 6.1 system. In the rear I am running Sony satelites. For the front I am running 2-way Pioneer bookshelves and a Pioneer center. When I heard them at the store they sounded amazing. But for the last year I have been having trouble tuning my bookshelves. I can hear every-other speaker clearly but these. I can barely here. When I do my test tone I can tell that they are not nearly as loud as the rest. Any suggestions?