Hey Wayne Loard!
Like they said the dealer is trying to not have to deal any more
. He's got your money now, the alternatives are these.
1. try putting some cheap insulation behind the speakers to give the music a fuller base sound(richer). Also you could try "Dynamate" it's a rubbery Tarp like substance that will stiffen the sound for you as well.
2. You could tear the original speaker, then go back and say why didn't your "tech" find this
?
3. Find out the size and go buy a good quality pair, if they don't improve the sound take them back tell them it didn't improve the sound I want my money back.
Hope we helped you, If so let us know
.