So, I have a reasonably good Kenwood Head Unit (KDCW6537U, 4x50w, 24bit DAC etc, use a USB Pen to store WMA/MP3 tracks at decent bitrate). It is matched with some now 7 and 8 year old speakers:
Kenwood 16cm components up front (tweeters in OEM mountings in wing mirror section on doors)
Alpine 6x9's on custom MDF'd rear stealth shelf
I run treble-blockers inline with the 6x9's which I have always liked, it keeps the treble at the front of the car which I always felt kept the sound stage where it should be given it is 99% only ever me in the car.
I have been debating for ages whether I would benefit from changing the speakers - on occasion I see the highly thought-of Infinity Kappa 6x9's for ~£70 new alongside the matching 16cm components for ~£100 or less. I wonder if I'd actually notice much difference or whether, to be honest, I should just stick with what I have and save my money.
Anyone got any thoughts? The existing speakers were not cheap but not expensive either. Think they were around the same price years back that the Infinity ones above are now.