Kenwood and Pioneer both make 4" by 10" speakers. I have the Pioneers in my DMC, and if I had it to do over again, I would do as DMC Joe says and put speaker boxes on the parcel shelf. Very flat sound is what you get. But for reference, the speakers are: Kenwood KFC-415C Pioneer TS-A4103 Both are available from Crutchfield (www.crutchfield.com) for 99.95 Scott Cagle