I'm getting my TSX worked on at a local roadshop at circuit city, and I just got a call saying since the Infinity 6.5s 6012c components are gonna come in later and they asked me if I would want them to just put in the 5.25 infinity comps since the hole in the TSX is for 5.25 anyways. I said are you sure the "performance, sound, SPL, and SQ is going to be the same" He said I'll make sure it is.

So that brings the question does speaker diameter make a difference with issues like these?

 

LOL.

The OEM TSX speaker is a 6.5. However, it does NOT have a huge hole in the metal behind the speaker. The OEM speaker uses a tiny magnet and the opening is nowhere near as big as the CL-S opening, for example.

There are some 6.5's that fit without cutting metal (DLS UP6, some Alpines, Dynaudio, etc) and some that don't fit without cutting metal (Alpine X type 170, DLS M6 and down, I think the new Diamond 6.0 kit, etc).

NO MATTER WHAT, you need spacers to make the speakers sound best. Read about spacers and mating spacers onthis forum... the installers sound lazy and not paid enough to make spacers, and perhaps ignorant too. Oh, wait, it's Circuit City! Go get your car away from those ignorami and go somewhere that ought to be working on cars.

OK, 6.5's as a general rule play lower than 5.25s and louder than 5.25s. 5.25s as a general rule have a better off-axis response in the upper mid than 6.5s.

Lots of people prefer 6.5s. I've run Alpine SPX-F13M 5.25 comps in my TSX and LOVED them... but my DLS UP6 6.5 comps have better midbass and the mids are as good or better. So it is a function of a lot of things, tweeter mechanics and resonance and xover point being some of them...

Ken