DC3

Not sure your point but the laws of physics don't really change. You might not be able to compare an 85 dB rated speaker installed in a door to an 88 dB rated speaker installed in a kick panel or rear box but when comparing various speakers to be installed in a common location, the one with the higher efficiency will always require less amp to drive it (assuming, as you point out, that manufacturers ratings are correct).

My point was that you might not need as much amp if you pay attention to speaker specs. Given the interior space in our Vettes, a smaller amp is a good thing. There are a lot of good speakers out there with decent sensitivity ratings that don't cost an arm and a leg. If you are not careful, you can easily spend more for a less efficient speaker. It's really all about matching components and finding something that works.

DC

Durango_Boy

Total agreement.

Paul L

Just to conclude my portion of DB's thread.

OK, I finished the other side today. Looks very nice. Interesting project. I learned a lot.



Come April when I see my car again we shall see (1) if they fit, and (2) if those Polk units perform better than the Pioneer 4 x 6"s (model TS-A4672R, three-way, highly recommended for this application).



Dynamat? I stuck it on but I really can't see what good it does.

*Edit*, apparently it does a lot of good according to reseach I did today (January 24). Thanks DB.

Paul L

Just a TTT to thank DB for this thread. When that Dynamat black goop sets it makes the kick panel hard as a rock. I was dubious and sceptical about the product but this morning those panels and speakers were very stiff and they are not going to move when installed. And as he stated, they are impervious to errant back side frequenicies bouncing out front. Not the correct physics language from me but you all get my meaning.

Durango_Boy

I can't wait to see those installed Paul, they look fantastic.

Paul L

Thanks DB. If anyone is interested the oxblood dye comes from my local AC Delco dealer. The panels were black and the Polk grilles were silver originally.

another-user

i dont mean to bring up a dead subject, but....

for those of you who have put the 6.5s in, how the hell did you hit the clutch with out ripping your speakers off?

i just put a mocked up wooden set in, and i cant see any conceivable way to hit the clutch with out getting my foot stuck on the speakers and ripping them up.

Ak. Mal

Earlier in the thread I posted a link to my build thread. I have no problem using the clutch with my speaker next to it. I would have preferred more angle on the mounting of my speaker, but then it would have been in the way. Unless you have feet like Sasquatch you should be fine. I can operate my clutch just fine in a set of size 11 steel toe workboots.

another-user

i actually took measurements of my feet, and the clearance of the wall to clutch. 3 inches on both.

ill try a couple of different spots, but i dont see this one working.

Paul L

Seems to be a lot of room there, at least for an automatic.

another-user

ya, for an auto theres just an insane amount of room.

i was just out there playing around with it again, and i just cant do it. im either going to get into an accident or blow up my motor or some such when i cant get to the clutch in a hurry.

ive got one last thing to try, ill cut the replica back a bit, instead of cutting out my bird cage. if i can get it to fit like that, i may trim my birdcage a bit to get them to fit.

vette427-sbc

I have those installed in a 4-speed car and have no problems when I'm bangin' gears. I wear wide shoes too and never touch the speaker.
Only picture I have, not great but gives you some kind of idea:

fauxrs2

Maybe its just me, but I've just completed installing aset of DB651's in my car and I do have to negotiate my foot around to get on the clutch..there is no chance I'll be ripping the speaker off but it does feel like there is less room.

It may just be the newness of the speaker being there, but I am concious of the speakers presence and i do rub up against it from time to time..

Size 12w footwear

edwgol

Cout you have mounted these speakers in the kickpanel with cutting out for the speaker?

BTAL

Wow, what a blast from the past. A DB originated thread.

To answer your question, you need to cut the kick panel for speaker clearance. Can't imagine a surface mounted speaker that would work in any way shape or form.

Richard454

Definitely a blast from the past...I PM'ed Durangoboy at the time about the kickpanel as a baffle- and in some, the holes for the original speakers were not covered. I tried to explain to him that is was an "acoustic short circuit." (Google it )

Where as the sounds waves coming from the back of the speaker are completely out of phase w/ the front sound waves of the speaker- Thus canceling out a lot of sound..... He came back w/ some mumbo jumble and told me I was wrong....

SO- If you going to use the kickpanel make sure there are no "leaks" from front to back....

Richard

christen

Looking into installing some 6.5" speakers in the kick panels in a 68' As mentioned here some of the larger speakers might require cutting in the birdcage. Is there any disadvantage for doing this beisdes that the car not is original any more?

vettebuyer6369

Repeating this question in an 8 year old thread is probably unnecessary.