Inspired by a question asked on the other side by someone who is now registered on here too and by the lack of bass on my system. OK, so I've got the original LR speakers rather than the HK ones but need to swap the 6.5" woofers in all 4 doors at the very least. I've got an aftermarket Kenwood DSP head unit driving the original speakers. Well, nearly original as I changed my basic spec door panels for ones from a higher spec car and found that as well as the wood on the outside, they had a pair of HK midrange speakers still bolted to them. So I've got bog standard woofers and tweeters but HK midrange at the moment. A professional sound engineer spent a good 2 hours while we were driving through Holland playing with the settings and got it as good as it can get but the woofers are decidedly lacking in the bass department (and there's no sub). As I've got OldShep's 2001 Vogue here with a working HK DSP system in it, I bunged a CD in the changer expecting amazing sound quality. No matter how I fiddle with the settings, it's good but nothing like as good as I expected it to be. In fact, it's not that much better than what I have. Maybe I've been spoilt recently with listening to the Bose system in an Audio RS7 and the Naim system in a Bentley but I don't see why it shouldn't be possible to at least get close.
So, I need to change the speakers. They need to be 4 Ohm, with as low a frequency response as I can find and not stupidly expensive. I'll probably need to add crossovers too. Most 6.5" speakers are 2 and 3 way coaxial but that isn't needed and so far I've narrowed it down to http://www.ebay.co.uk/itm/2x-Skytec-6-5-Hi-Fi-Polypropylene-PP-Mid-Woofer-Bass-Speaker-Driver-Cone-200W-/182455996924 (nice low frequency response but 8 Ohm so no idea how they would interact with the HK mid-range and standard tweeters I've got in there and I've never heard of Skytec), these http://www.ebay.co.uk/itm/JBL-300W-TOTAL-2WAY-6-5-INCH-16-5cm-CAR-DOOR-2WAY-COMPONENT-SPEAKERS-TWEETERS-/190885731881 (A name everyone has heard of, 4 Ohm but frequency response only down to 50Hz although they do come with a pair of tweeters, which I don't need, and a pair of crossovers but are described as mid-range) or these http://www.ebay.co.uk/itm/Bass-Face-6-5-Inch-16-5cm-165mm-800w-Mid-Bass-Drivers-Car-Door-Sub-Speakers/351990186243 (which seem to meet the spec but are just for the speakers so crossovers would need to be bought separately). My head unit also has an output for a sub so I will probably add one of them too.
Anyone tried any of these or got any other suggestions?