Speaker sizes
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Navigator
Joined: Mar 2026
Posts: 9
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Speaker sizes
Hey all, I keep seeing people saying you can fit 6x9s in the rear and 5.25s in the front. I'm not quite sure how that's possible as on my 1994 Vette with bose gold system, the mounts quite clearly only fit a 6.5 in the rear and a 4 inch with a small tweeter next to it in the front. Can someone enlighten me on how to upsize the speakers? With the 4 incher in the front, it gets completely drowned out by the 6.5 in the rear and I can't hear it at all. Does anyone have a speaker to recommend for replacement of both? The audio in the current fosegate p1650 has the bass super muddy and the highs really sharp. Could this be due to underpowering (only 10 watts from head unit and requires 55)? I plan to amp both the fronts and rears soon but should I replace the speakers also or just start with an amp and see how it sounds?
Thank you!
Thank you!
Race Director
Joined: Oct 2012
Posts: 17,281
Likes: 6,470
From: Melbourne, FL
You modify or replace the speaker mounts/boxes.
I had 6.5s and 4s in my boxes before with 8s in the back. Now I have just 6.5s.
Speaker location in the C4 isn't great. You do need to put a slot of power into the front and low pass the rear IMO. My front speakers get ~150W RMS off their amp now.
I had 6.5s and 4s in my boxes before with 8s in the back. Now I have just 6.5s.
Speaker location in the C4 isn't great. You do need to put a slot of power into the front and low pass the rear IMO. My front speakers get ~150W RMS off their amp now.
Le Mans Master
Joined: Jul 2000
Posts: 7,634
Likes: 325
From: Greenville SC
I did those many years ago. I used wooden plates in place of the boxes in the front, and mounted wooden plates over the holes in the rear, and mounted speakers in the plates, with stock overs over all of them.
I have a 4 channel amp, and low bypass to the 6x9s for mostly bass, and then also fade to the front. It sounds good when the engine is off, but a lot of the quality is lost when driving. (loud heads/cam/headers)
I have a 4 channel amp, and low bypass to the 6x9s for mostly bass, and then also fade to the front. It sounds good when the engine is off, but a lot of the quality is lost when driving. (loud heads/cam/headers)
