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View Full Version : Installed Components: They shut off then played the next day??



ttran
07-21-2007, 01:53 AM
installed some pg rsd6.5s running off a jl audio e2150.

I was driving for about 15 mins with it bumping pretty hard. stopped at a gas station turned the car off, then when I got back in and cranked it up. The driver side shut off, then the passenger.

Parked at a friends house for an hour or so, but when I turned it back up. the same thing happened, but only the driver side was out.

Next day: everythings working fine. audio guy adjusted something on the amp.


any idea on what would cause this? He told me the crossovers got too hot.

mlstrass
07-21-2007, 01:57 AM
amp gain was too high, so pushing too much power through the xover's. Good thing you got it fixed before frying them...

ttran
07-21-2007, 02:06 AM
amp gain was too high, so pushing too much power through the xover's. Good thing you got it fixed before frying them...


is that "input sensitivity"?? I have it at 3/4 right now. amp is rated at 70watts. the speakers are rated at 60 watts rms.

Prowler573
07-21-2007, 04:33 AM
What kind of amp and what source unit do you run?
I find it hard to believe, if you have any type of modern headunit, that 75% gain setting is appropriate. :crap:

ttran
07-21-2007, 11:58 AM
What kind of amp and what source unit do you run?
I find it hard to believe, if you have any type of modern headunit, that 75% gain setting is appropriate. :crap:

I have a jl e2150 pushing the components. my headunit is a pioneer 880prs.

the amps sensitivity is set to 3/4s.

kross
07-21-2007, 07:18 PM
That amp is much too small for those comps. Your 2-channel amp is rated for 45w x 2 @ 4 ohms. You'll want to get an amp that has at least double that, if not more. It's no wonder you were overheating your amp.

The PG's can take a lot more power than the 60w rms that they are rated for. They can handle 100w rms no problem.

Look into Profile amps, they make good quality, inexpensive amps. Here's a good 2-channel amp for you:

http://www.woofersetc.com/index.cfm?fuseaction=product.display&Product_ID=4874

You can also look into 4-channel amps if you think you might need it some day.

Also, please, read the sticky in the amp section of the forums for properly setting the gains on the amp. For the most accurate setting, use a DMM if you have one.

-- Kevin

Louisiana_CRX
07-21-2007, 07:22 PM
Sounds like the protection circuit was kicking in....

ttran
07-21-2007, 07:25 PM
That amp is much too small for those comps. Your 2-channel amp is rated for 45w x 2 @ 4 ohms. You'll want to get an amp that has at least double that, if not more. It's no wonder you were overheating your amp.

The PG's can take a lot more power than the 60w rms that they are rated for. They can handle 100w rms no problem.

Look into Profile amps, they make good quality, inexpensive amps. Here's a good 2-channel amp for you:

http://www.woofersetc.com/index.cfm?fuseaction=product.display&Product_ID=4874

You can also look into 4-channel amps if you think you might need it some day.

Also, please, read the sticky in the amp section of the forums for properly setting the gains on the amp. For the most accurate setting, use a DMM if you have one.

-- Kevin

its rated at 45watts at 12.4volts and 70 at 14.4v, which is closer to what my car runs when its started, so I'm actually getting around 65 watts.

I don't think the amp is overheating. I've actually lowered the gains on the e2150 and it hasn't shut off since. I believe something was causing the crossovers to overheat, not the amp.

ttran
07-21-2007, 07:27 PM
Sounds like the protection circuit was kicking in....

what is that?

CRAZYCORNUTS18
07-21-2007, 07:35 PM
That amp is much too small for those comps. Your 2-channel amp is rated for 45w x 2 @ 4 ohms. You'll want to get an amp that has at least double that, if not more. It's no wonder you were overheating your amp.The PG's can take a lot more power than the 60w rms that they are rated for. They can handle 100w rms no problem.

Look into Profile amps, they make good quality, inexpensive amps. Here's a good 2-channel amp for you:

http://www.woofersetc.com/index.cfm?fuseaction=product.display&Product_ID=4874

You can also look into 4-channel amps if you think you might need it some day.

Also, please, read the sticky in the amp section of the forums for properly setting the gains on the amp. For the most accurate setting, use a DMM if you have one.

-- Kevin i just want to say that under powering the speakers isnt going to do anything to the amp

ttran
07-21-2007, 08:12 PM
i just want to say that under powering the speakers isnt going to do anything to the amp

thats what i thought :)

blimblam
07-21-2007, 08:26 PM
sorry to hijack your thread but, how do the comps sound? i have the same set but have yet to install.

kross
07-21-2007, 08:56 PM
i just want to say that under powering the speakers isnt going to do anything to the amp

Even when he turns the gains (almost) all the way up, like he did?

CRAZYCORNUTS18
07-21-2007, 08:58 PM
the gains could do it but the underpowering of the speaker will not

kross
07-21-2007, 09:04 PM
the gains could do it but the underpowering of the speaker will not

That is what I meant in my first reply. When someone has an amp that is a little under powered for the speakers, they will usually turn the gains all the way up to get more sound, as he did.

ttran
07-21-2007, 09:06 PM
That is what I meant in my first reply. When someone has an amp that is a little under powered for the speakers, they will usually turn the gains all the way up to get more sound, as he did.

I had them at about 3/4s when I first installed them. They are now set at between half and 3/4s.

CRAZYCORNUTS18
07-21-2007, 09:08 PM
i would get a stonger amp and set the gains properly

ttran
07-21-2007, 09:12 PM
i would get a stonger amp and set the gains properly

What do you mean properly? 75 watts should be plenty for speakers that are rated at 60rms right?

CRAZYCORNUTS18
07-21-2007, 09:17 PM
ok i just look at the rating yes thats a good amp for those just turn your gain down

kross
07-21-2007, 09:21 PM
I had them at about 3/4s when I first installed them. They are now set at between half and 3/4s.

BTW, did you get the problem resolved where the mids weren't putting out any sound?

ttran
07-21-2007, 09:25 PM
ok i just look at the rating yes thats a good amp for those just turn your gain down

Ya, I turned them down from 3/4 full to about 5/8. Seems to be playing real nice now. I lowered the filter frequency from 200hz to 80hz. The guy at the audio shop had no idea what he was doing.

ttran
07-21-2007, 09:26 PM
BTW, did you get the problem resolved where the mids weren't putting out any sound?

Yes, lowering the filter frequency fixed that. :). It sounds much more leveled now.

Is there a way to tweak the highs to make it sound better? Which frequencies would control that?

kross
07-21-2007, 09:42 PM
Is there a way to tweak the highs to make it sound better? Which frequencies would control that?

Your HU has a 16-band EQ. Time to start tweaking (the EQ). :)

ttran
07-21-2007, 10:19 PM
Your HU has a 16-band EQ. Time to start tweaking (the EQ). :)

I will start playing with that and see what I can find in the manual

any suggestions on how I should set each band??:)

kross
07-21-2007, 11:52 PM
Umm, move everything above 3000Hz down a few dB's? Really, only you know what sounds best in your car.

The most scientific way is to use a real time analyzer (RTA), along with a calibrated microphone, and a pink-noise source. Then you can adjust your system for a nice flat response across the audible spectrum. You could use TrueRTA with a laptop computer, but you still need to get a good microphone.

A cheaper, but less accurate way, is to use a Radio Shack SPL meter. Then you need test tones, one for each band of your EQ. You play each tone, one by one, and adjust the EQ so that the SPL registered on the meter is the same for each frequency. The free version of TrueRTA can be used as a tone generator, with a laptop computer, if your HU has an AUX input, like for an iPod.

Hope this helps!
-- Kevin