Thread: D2 Harmon Kardon Subs and Alpine x801D-u

When searching for suitable speaker replacements, what mind numbing task that is!!!!, saw refoaming speakers was possible and when looking at the speaker itself, sure there is dust, alright, a lot of dust but has anyone tried refoaming the speaker.

HOW TO: DIY speaker refoam using a Parts Express repair kit - YouTube

I am supposing that the dust on the speaker whilst not ideal will mostly blow away now if this was a tweeter the residual would too much 'weight' but on the low frequencies the impact would not be as noticeable.... Hmmm too much time on my hands with covid lockdown?


This one looks even easier with a BATTERY not shims

Refoaming a set of Infinity RS-225 Hi-Fi Speakers WITHOUT Shims - The Soundtracker - YouTube

There is a mob in Australia that will rebuild speakers to better than they were new. Their details have been put up on here before.

I've also shared details of an aftermarket solution I did and the minor modifications required to make it work. I'm sure you'll be able to find it with a search.

As for headunit fitment. Standard opening is 1 DIN although the factory headunit has a taller face to make it look bigger - this is misleading.
Some plastic can be cut away which will get you close to 2 DIN size (approx 75mm height).
Double DIN requires extensive dash modifications. There's a number of examples of people who have achieved this only - many have close to a factory look. Personally I can't see the effort benefit any more now that there's awesome single DIN headhunts with large external screens like the Alpine Halo 9 series for example - plenty of threads already on the fitment of these.

Noting that you have the factory subwoofers be careful how you connect an aftermarket headunit to the factory amplified. The factory amplified uses speaker wire connections but it's not actually a speaker amplified input - it's actually after the RCA output from your headunit (you'll need a headunit with four RCA outputs - 2x front and 2x rear). You'll need to do some customising to make the connection work - personally I think fitting RCA connections on the factory amplifier wiring as previously documented on here is the easiest, otherwise a hight to low converter can be used but that's complicating things and making another possible noise input.

Can't offer much here, but I'm in the process of installing an Alpine ILX 702d into my D2. I'm currently having issues with the mounting bracket (Will end up making my own post for that one), but you may find this video by Matt Tester on YouTube helpful.