I've been meaning to post some pic of my audio install. Rather than write an essay I will be brief with lots of pictures. Aim of the system was light and competition level sound quality. I used CLD, Egg box foam and 3M thinsulate to sound deaden. The latter two are very very light. I added 6kg of CLD total. I decided pretty quickly to have a front and sub with a fully active setup. Pioneer Headunit with DSP and crossovers built in and 3 amplifiers; a two channel for tweeters, a two channel for mid/bass and a single channel for sub. The two front amps fit under the drivers and passenger seat. The sub amp goes in the back mounted to the sub box on isolation feet. Doors were damped with CLD, sealed to make air tight as possible and foamed to prevent rattles. Speakers mounted on MDF baffles treated to seal them from water damage.  I also added sound deadening to rear arches which made a world of difference.  System Spec DEH-80PRS Headunit Genesis Profile 2 for Tweeters (under passenger seat) Genesis Profile 4 bridged to drive the mid/bass (Under Driver Seat) Genesis Profile Sub for the Sub (boot) Morel Virtus 602 component fronts Peerless XLS 10 4ohm subwoofer Van Damme Pro Audio Blue Speaker Cable (2.5mm for mid/bass and Sub, 1.5mm for tweeters) Van Damme Pro Audio Instrument cable with Brass Gold plated RCA connetors CCA 4AWG and 8AWG power cable   Here is a ton of pictures.  The headunit Dash in pieces fitting the Microphone for the bluetooth phone calls. Surround was glued together and covered Filled   Next up - The Battery Installed an AGM battery for better voltage regulation   The Doors Damped with CLD and added some Egg box foam inside Sealed to make as air tight as possible Whole door covered in closed cell foam Speaker baffle with acoustic foam to protect the back of the speaker from water behind the speaker Tweeter in the dash The Amps I forgot to take a pic of the passenger side but here is the drivers side for the mid bass (its bridged Genesis Profile 4)   The Sub Sub enclosure is a hybrid MDF and Fiberglass molded to the base of the boot and bolted down using the spare wheel anchor and screwed to a bit of MDF glue the panel at the back. Sizing it up ready to fibreglass curing Made the top and test fitted the sub and Grill covered amp mounted on isolation supports installed in car   Finally some addition sound deadening to block some road noise Layer of CLD to reduce panel resonance and two layer of 3M thinsulate This is the best place to start with sound deadening. Reduced road noise massively.    So there it is. Hope you like it. Any questions please ask away. Cheers