My Si came with a Sony HU and Clarion speakers as standard. The HU was good but I replaced it with my Alpine 9843r out of my old car, and the sound improved quite substantialy, even with the standard speakers. Friend let me play with his install (no pun intended
) which was mostly Kenwood/JVC and I thought it was good, but I decided to go for Alpine since I liked the sound of the brand name
, and have got to admit, even with clarion front spakers and budget alpine rears (SXE-1725S 6 1/2"), the sound was brilliant.
Now I've got an Alpine SWR1221D sub, 9828RB head unit and ahve just bought some SPS-690A speakers to replace the 6 1/2". Plan to buy some S type 5 1/2" components for the front next.
I'd also like to reccomend Maystar's QX series amps (
www.qxseries.com). My fist sub was a £30 sub, amp & crossover thing I bought off eBay, and the amp was the most basic QXA250, but it sounded awesome with the sub, even though it was an ooooold hammered alpine 10" thing. Now I've got a QXT200 running my new sub and the crossover is brilliant, the sound is briliant and I just love the thing to death. Can't say I wasn't tempted to buy some QX 6x9s instead of the alpines, but I'd be curious to know how they'd sound.