Just put a deposit on a W124 Cab and while I am waiting for it to be prepared I have been researching my ICE options, don't seem to be too many. It seems that although expensive, the Rainbow direct replacements are the way to go on the dashtop speakers. Has anyone any experience with any other less expensive brands? But as I only have the two pods under the armrests in the rear, which apparently have 5 inch speakers in them, I think the car will be lacking bass. I am not looking for ground shaking levels but just enough to round off the sound. I will be including a small amplifier in the mix to help a new mp3 playing headunit by the way, which I may wire up to the fronts while letting the amp deal with the rear/sub. I don't think a boot installed subwoofer will do much because of the apparent excellent sound insulation so I was wondering whether you have any ideas on what I can do. The underseat option seems to have been ruled out by the electric seats, but I was thinking about whether a small sub in each door could work or in the kickpanels in the front footwells, with midbass in the pods. Or perhaps put mid bass in the door pockets with the subs in the rear pods on the armrests? Maybe you have come across a speaker that could do both jobs just from the armrest pods? I have seen these Jenhert door pocket solutions but they are very expensive and really I am trying to do this on a relatively tight budget so any advice you might have would be very much appreciated.