inputs.text: working great home audio systehem issue plastic edge precut hole - know vehicle hookups need 4 ohm speaker lower resistance like 2 ohms 1 ohm needed 8 ohm speaker replace old mtx 8\\ speakers 20500 hz back 1988 yes actually held long looked lot speakers online finally found one closest specs needed mtx not appear carried anything sort long time least 200w peak 8 ohms roughly 20500 hz issue ran 10c88 woofer though size speaker holes larger 14\\ 18\\ way around speaker hole order accomodate plastic rim sticks side speaker not info provided product description figured would add case anyone needs prior purchasing old speaker holes came metal rim original speakers thehemselves however due 18\\ plastic edge way around speaker covers metal rim would not fit original speaker hole without using router fancy circlejig creation route hole 18\\ larger got mounted works sounds great no issues sound quality whatsoever plastic edge makes mounting precut hole little bit headache amazons delivery speakers sound excellent though