Ive recently installed a couple of Peerless D6 components. Umm, to cut a long story short... I had trouble installing them initially, however when I did manage to (they are great to install, its just my tricky car), they really did lack in the lower frequencies. It could do it, kinda, but only at very high volume, and not without the interior side panels rattling and vibrating constantly. The bass was raw, and undefined. However, in saying this, what peerless have created here is a beautiful mid-range component set, that is super crisp nd accurate through the middle to high frequencies. It is very very clear. I think these would be good with some resonant back up, so to speak, like a powerful pair of Morel 6X9's. Except at the moment im without these, and i was wondering if anyone had knowledge on these [Morel 6x9's].