87firebird

If I face 12" subs at the glass of the hatchback is there any chance of the subs breaking the glass when I play music???


Doug Simpson

Ravenous

Don't count on it. Keep in mind that sound does not only come from the top side of your speaker. It travels in all directions.

So if the subs could break the glass, 1) that'd be quite impressive or 2) no one would have any subs in their third gen.

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Ravenous ...stronger than you think.

[This message has been edited by Ravenous (edited March 24, 2001).]

Belker

It more likely (with enough subs and enough power) that you would damage the seal around the window and cause it to leak. If you're just gonna have 2-3 subs getting 2-300 watts each (or less), I wouldn't worry about the back window.

Jim85IROC

iTrader: (2)

Anybody that tells you that they had a friend with a cousin's sister's boyfriend that broke the rear hatch with his 2 18" subs is an idiot. Unless the glass was damaged to begin with, it just isn't going to happen.

------------------
The IROC Homepage
<A HREF="http://www.rit.edu/~jli4307/camaro" TARGET=_blank>
View the restoration of an 85 IROC</A>
"I didn't know a bored out Ford could go so slow" -Shenandoah

jobryan26

I saw a guy a local soundoff crack his Windshield when he hit 149db with 4-15's (wall)and 1500 watts in his 89 IROC. But I wouldn't worry about breaking the rear glass. As someone stated earlier the way the hatch is designed the subs if mounted flat in the well will not allow the full impact of the sound pressure against the glass because of the deck lid area and the angle of the rear glass.

------------------
'87 Trans Am:
(Engine)
305 TPI
160 Degree Thermostat
TB Bypass
Accel 300+ 8.8 Racing Wires
Accel Super Coil
Bosch Platinium Plugs
Custom Ram Air with K&N
Removed Emissions Equipment
(Stereo)
Kenwood Excelon

Jim85IROC

iTrader: (2)

His windshield was comprimised to begin with. There's no way in hell that 149dB can create enough pressure to break a windshield. I've seen 160dB cars with a totally stock, un-reinforced windshield and nothing ever happens. The pressure will vent through other, far weaker means before breaking glass, but even if glass were to break, the side windows are FAR weaker than the front or rear glass. Of course, the pressure would most likely just bow the steel panels before causing something as rigid as glass to ever break. This of course makes no mention of the incredibly weak rubber door and window seals.

------------------
The IROC Homepage
<A HREF="http://www.rit.edu/~jli4307/camaro" TARGET=_blank>
View the restoration of an 85 IROC</A>
"I didn't know a bored out Ford could go so slow" -Shenandoah

KlayBuRn

yea, i like to look at the DB vehicles, concrete for a floor, and the windows riveted in, with freezer weatherstripping...

hehe, audio tanks on wheels =)

jobryan26

Boy bashing time huh? Well just to set it straight I don't know you people therefore I have no reason to lie to you. After all I said "I saw a car"(if I was going to lie I surely would have said something better like "My Car". Guess you've never heard of 6-10's hitting 171.3db's either and it didn't break his windshield, so what's your point? I'm not here trying to play this "mines better than yours" So don't flame me! Now to clarify I don't know if he had a rock chip that might have started it because I was standing at the back of the car. Heat build up in the car could have caused it to because it was like 101 degrees and we have really high humidity. But when everyone went nuts I had to see what's up and yes it cracked. Before judging how about trying to get more info first and also realize that the Installation is just as important as the equipment you use.

------------------
'87 Trans Am:
(Engine)
305 TPI
160 Degree Thermostat
TB Bypass
Accel 300+ 8.8 Racing Wires
Accel Super Coil
Bosch Platinium Plugs
Custom Ram Air with K&N
Removed Emissions Equipment
(Stereo)
Kenwood Excelon

Jim85IROC

iTrader: (2)

Dude, pull the chili pepper out of your *** . Nobody's jumping all over you. We're just disagreeing. I'm also going to disagree that 6-10s could ever get anywhere near 170dB unless it was in an Outlaw competition. Seeing 6 10s get past mid 150s would be a substantial achievement. Seeing them in the 170s would require a massively re-worked vechicle with an air-tight and very rigid, very small cabin. With that and some extremely durable, high-excursion subs, I might believe it if I saw it.

------------------
The IROC Homepage
<A HREF="http://www.rit.edu/~jli4307/camaro" TARGET=_blank>
View the restoration of an 85 IROC</A>
"I didn't know a bored out Ford could go so slow" -Shenandoah

KlayBuRn

jims a pimp

HrdRockA4305

-preparing to duck for cover from flames for saying this just in case-

Just to put in my .02 as always, i do know a guy (ok maybe freind of a freind) who cracked the the back window in his 4th gen with his subs, but on the other hand it was also on a sub freezing day so the glass was much more brittle. But thats just a lack of common sense if you ask me.... i mean at least let the defogger melt the ice off the window before blasting the subs.

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88 Base Camaro
305 Auto
All Stock....for now

jobryan26

O.K. Jim sorry to you and everyone for being an a**. I just hate it when people think or act like they know everything by saying stuff like it can't be done or that's B.S. I guess what I was meaning was anything is possible and we should be more opened minded to the views of others. I'm sorry. Jim as to the vehicle I was talking about was the Kicker Van. I was totally surprised to hear of 6-10's hitting 171.3db's. It sounds unreal it's true here's the pic and the link. http://www.kicker.com/kcsc/mainx.sho...e=TylerOKC.htm

------------------
'87 Trans Am:
(Engine)
305 TPI
160 Degree Thermostat
TB Bypass
Accel 300+ 8.8 Racing Wires
Accel Super Coil
Bosch Platinium Plugs
Custom Ram Air with K&N
Removed Emissions Equipment
(Stereo)
Kenwood Excelon

Jim85IROC

iTrader: (2)

Judging by the picture, that van was reinforced like I described. It does look quite interresting.

------------------
The IROC Homepage
<A HREF="http://www.rit.edu/~jli4307/camaro" TARGET=_blank>
View the restoration of an 85 IROC</A>
"I didn't know a bored out Ford could go so slow" -Shenandoah

Gen X Maro

we'll i've broke two back glasses and have a friend with a third gen who did as well..suppose its not possible though

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1992 RS 25th anniversary..305 tpi conversion,slp headers,jet chip,3 inch flow master exhaust,3:73 richmond gears,big block style hood,80 degree tint,black outs,b&m megashifter,high rise spoiler,and much more.

Stereoioneer 8000R with organic screen,2 memphis 1000d amps(1100rms each) 4 memphis shp 12's 2 capasitors,audiobahn line driver,memphis crossover,stinger dry cell battery.

Jim85IROC

iTrader: (2)

I still say it isn't. We did an 86 Cavalier hatch back that hit 156dB all day long and never broke any glass. The rear area is the same shape as an f-body except that the glass is flat instead of curved. That curved glass is substantially stronger than thin flat glass. So, unless you're throwing rocks at your glass, I don't believe that it's breaking from the SPL and I'll continue not to believe it until I personally witness it.

------------------
The IROC Homepage
<A HREF="http://www.rit.edu/~jli4307/camaro" TARGET=_blank>
View the restoration of an 85 IROC</A>
"I didn't know a bored out Ford could go so slow" -Shenandoah

jobryan26

I agree with Jim and anything is possible. And yea Jim you're right about the Van I'm sure they went to extremes to make it do what it did and sorry again for the jerk thing. I do respect you and your opinion.

------------------
'87 Trans Am:
(Engine)
305 TPI
160 Degree Thermostat
TB Bypass
Accel 300+ 8.8 Racing Wires
Accel Super Coil
Bosch Platinium Plugs
Custom Ram Air with K&N
Removed Emissions Equipment & Cat.
(Stereo)
Kenwood Excelon

Gen X Maro

Well my back glass breaks came from a 162 an 164.3 db run....and i assure you there were no other variables contributing to the breakage......it can happen..some people are just lucky to not have it happen...i'm working on bullet proof glass now =0)


------------------
1992 RS 25th anniversary..305 tpi conversion,slp headers,jet chip,3 inch flow master exhaust,3:73 richmond gears,big block style hood,80 degree tint,black outs,b&m megashifter,high rise spoiler,and much more.

Stereoioneer 8000R with organic screen,2 memphis 1000d amps(1100rms each) 4 memphis shp 12's 2 capasitors,audiobahn line driver,memphis crossover,stinger dry cell battery.

83CAMAROMAN

i have a frined who had two alpine 15s in his 87 bird and cracked the rear glass(and there were no VISIBLE weaknesses in it)

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1983 CHEVROLET CAMARO with a 1986
305 C.I.D.V8 BORED .030 OVER
HIGH VOLUME OIL PUMP
FLAT-TOP PISTONS
MILD CAM
3" CAT BACK EXHAUST W/ FLOWMASTER MUFFFLER
KEYSTONE CLASSIC WHEELS.
B&M RATCHET SHIFTER
STAGE THREE SHIFT KIT
(she'll spin em into third)

CHECK OUT MY SITE http://www.fbody.com/members/bigdaddyshawn/


MUSTANGS SUCK

9177

I have never heard of anyone just cracking temperd glass its either broken or not.

Ravenous

Jim is the moderator of this board 'cause he knows his ****. You can almost take his words for gospel. If he says 6 10"s would be incredibly difficult to get to 170dB, then I more than agree with him. If he says you aren't going to crack your hatch glass, you should believe it.

------------------
Ravenous ...stronger than you think.

Jim85IROC

iTrader: (2)

Actually, I'm not the moderator anymore.

But, in other news, Team Gates, with their excessively modified Kicker Bronco managed to hit 165dB with 48 L7 subs powered by 48 ZR1000 amps. 48 subs, with over 50k watts of power.

------------------
The IROC Homepage
<A HREF="http://www.rit.edu/~jli4307/camaro" TARGET=_blank>
View the restoration of an 85 IROC</A>
"I didn't know a bored out Ford could go so slow" -Shenandoah

KlayBuRn

jesus, heh...they shoulda put 12 of those 10's in there
hehe

jobryan26

Hit 165db with 48L7 Subs and etc. The Kicker Van above has 6-Signature Series Solo-Baric L7 subs , 12-KICKER ZR1000 amps and hit 171.3. That goes to show what I've been saying for years. IT'S ALL ABOUT THE INSTALLATION! Check out the link I put above to the van. If he would have spent all that money on the installation besides enough Equipment for everyone on this board It would have saved him alot of money, and space.


------------------
'87 Trans Am:
(Engine)
305 TPI
160 Degree Thermostat
TB Bypass
Accel 300+ 8.8 Racing Wires
Accel Super Coil
Bosch Platinium Plugs
Custom Ram Air with K&N
Removed Emissions Equipment & Cat.
(Stereo)
Kenwood Excelon

STL1994

ive seen a lot of people break glass with subs before, but ALL the time like jim said, the glass was cracked already. a friend had a rock chip that escalated into a full crack over time, so he blasted his subs to blow the glass the rest of the way before he bought new glass. i know, he's an idiot, it looked pretty cool, but it was tampered with already

if you had a 2" thick metal box for a car, small box too, welded all together, air tight to the point where you need an oxygen tank, and a few subs, and glass, MAYBE it would break.

Belker

Keep in mind you can't compare two different SPL measurements unless they are measured in the exact same way (and they are measured with exact same mic or ones that are very closely matched in calibration). A claimed 160 db car could actually be louder than a claimed 170 db car.