these guys installed some amps and a some door speakers for me. they told me my 6.5"s were too small and they had to build a mdf ring for them. charged me an extra $35. guess what... pull off the door panel a year later and theres no mdf ring at all. they are didnt hook up my amps to the right speakers like i told them to either. i told them i wanted my 4 channel bridged on the components and this small jbl amp on my 4x6"s. had to fix it myself.