Matsui Tv Dvd Combi Volume Fault I Purchased A TV/DVD Combi, Matsui LM15N5DVD The Sound Coming From This TV/DVD Combi Is Very Poor And Tinny.?

I purchased a TV/DVD combi, Matsui LM15N5DVD the sound coming from this TV/DVD combi is very poor and tinny.? - matsui tv dvd combi volume fault

I followed a compatible audio system to improve the quality of sound I'm after something that need only the strongest television, I improve the quality of sound and do not pay a fortune, will appreciate any help that more.