Stereo zone not working

[307]

Have a brand new Chaparral 307 Ssx. Tower speakers on zone 4 not working right. Very light sound, muffled, no mater how high I turn volume. Other speakers all work fine….help?

 

[Denny]

Have a brand new Chaparral 307 Ssx. Tower speakers on zone 4 not working right. Very light sound, muffled, no mater how high I turn volume. Other speakers all work fine….help?

Maybe a loose wire.