MRD-1000 amp,2 12" Treo’s, subs clipping

I have a 98 cavalier z-24, stock 105amp alt. I have a alpine cda-9872 deck, mrd-1000 amp, and 2 Treo 12" SSI's. They are in a larger center-port enclouser.  When I turn the volume up the subs start to clip and cut out. They dont even really destort just start clipping. I installed them using a 4 ga Rockford install kit. I went to the stereo shop where I bought the sysytem and the salesmen said I needed a larger alt. I have the bass setting on the deck at -7 and usally run the sub setting at  +7 give or take. It goes 0 - 15. Does anybody have any ideas.

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Alpine cda-9855
Alpine Mrd-m1000
1 farad digital Rockford cap
2 Treo SSi 12's
Large centerport box

What other kinds of amplifiers do you have hooked up (if any)?

What have you set all of the amplifier settings to?

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~WAYLAND

These are the settings the amp is currently at.

Input              = 2channel

Input level     = 0db

input gain     = 9db

Lp                  = 85hz

Subsonic      =  50hz

Paramic EQ = On, 36 Hz, width 0.5, level 12db

Bass comp  = on , mode 3

time correction = on 1.6ms

output disable  = off

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Alpine cda-9855
Alpine Mrd-m1000
1 farad digital Rockford cap
2 Treo SSi 12's
Large centerport box

You OBVIOUSLY have no idea how to set your gain. Take a lesson or two, reset everything CORRECTLY, and come back and tell us everything is OK...

First off, you are only amplifying 50 to 85 Hz, but your bass boost is centered on a frequency OUTSIDE of that band - 36Hz, and with a Q of .5 (VERY NARROW), you are not even THINKING about hitting any of the frequencies you are TRYING to amplify.

Secondly, read my opening statement again. It sounds to me like you have every gain setting on the amp cranked up, which is a SURE way to blow a woofer. 0dB input level? That is unity gain (or 1:1). +9dB input gain? That is like asking a 100 watt amplifier to produce 800 watts! That is a 9dB gain.

Thirdly, turn the bass comp OFF. These things, without exception, cause more damage to subwoofers than they are worth.

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It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

Turn that gain down,  drop the lp filter to 70hz, drop the subsonic to 20 hz, turn off the time correction unless the subs are on your dash...doubt it. I can't even think about that to say about your Parametric settings...... Please get it professionally set up before you blow your subs and amp.

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2003 Chevy Avalanche,Eclipse CD7000,Morel Elate 5,Adire Extremis,Alpine PDX-4.150, 15" TC-3000, 2 Alpine PDX-1.1000, 470Amp HO Alt.

^^^WHAT THEY SAID^^^

Subsonic should be at 20
LP between 70-80
Bass comp, off
time correction, off
Output disable, on (unless you have another amp hooked up)
Input gain, set up according to head unit...


Guaranteed your stuff will work once you fix the bass comp and gain PROPERLY... if not, you may have already fried the charging system, or stereo. Also check all of your power wire and fuses for being safe, secure, and undamaged..

Parametric EQ, don't even deal with it...take it to a professional audio shop if you want to get into that...

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~WAYLAND

[QUOTE=haemphyst]You OBVIOUSLY have no idea how to set your gain. Take a lesson or two, reset everything CORRECTLY, and come back and tell us everything is OK...

First off, I know how to tune the avaerage amp that comes into our shop. I have just never worked with an amp that had such a broad range of adjustments so hold off on the hostility killer.

Second ,ost amps i tune are not digital ad have a gain, low pass, and high pass

but thanks for the help anyway, i will change them when i go on beak and let you know.

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Alpine cda-9855
Alpine Mrd-m1000
1 farad digital Rockford cap
2 Treo SSi 12's
Large centerport box

The subwoofer setting on Alpine decks seem to just affect how much voltage the deck will send to the amplifer, most sources I have read recommend running it at the full +15, I do with my deck and have the bass boost off and the settings to +0 on both the deck and amp and it works great.

I would turn your deck bass setting to +0, your amplifier gain down until you can set it correctly with a meter, and your bass boost off.

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2003 Chevrolet Silverado Standard Cab ~ Alpine CDA-9851
Diamond Audio D3600.1 ~ 2x Diamond Audio TM310D4
Diamond Audio D3400.4 ~ Diamond Audio Hex S600s
AstroStart RS5204 Remote Start/Alarm

I turned the amplifier to the settings you all recommended and now I am getting no sound at all. You can go through all the settings but when you go to the amps display it displays ---. The stereo shop said it was in protect mode but they did not know how to get it out.

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Alpine cda-9855
Alpine Mrd-m1000
1 farad digital Rockford cap
2 Treo SSi 12's
Large centerport box

On my deck my sub setting is around 7, and my bass on my deck is at -7.

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Alpine cda-9855
Alpine Mrd-m1000
1 farad digital Rockford cap
2 Treo SSi 12's
Large centerport box

Remove power and test the sub(s) for ohms and see if the wires were possibly touching somewhere.  If that all checks out, leave the amp disconnected for a couple hours, disconnect all inputs and outputs and see if it's still in protect.  If it stays in protect with only the power, ground and turn on lead (and they read like they should on the meter) hooked up, you have a bad amp.

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My ex once told me I have a perfect face for radio.

Are you sure it's not the Output Disable? If all you changed were the amp settings, you shouldn't have done anything to cause it to go into protection.

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Nik
Jeeputer Progress
[|||||||||||-] 90%
Check it out.

Its near impossible to fry an alpine digital amp, turn safe mode off, and remember to save your settings.

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2003 Chevy Avalanche,Eclipse CD7000,Morel Elate 5,Adire Extremis,Alpine PDX-4.150, 15" TC-3000, 2 Alpine PDX-1.1000, 470Amp HO Alt.

Does anybody know how to get a digital alpine amp out of protection??

Please, this is the most expensive paperweight I have ever owned.

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Alpine cda-9855
Alpine Mrd-m1000
1 farad digital Rockford cap
2 Treo SSi 12's
Large centerport box

in the settings its called "safe mode" , setting #9 , turn it off.

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2003 Chevy Avalanche,Eclipse CD7000,Morel Elate 5,Adire Extremis,Alpine PDX-4.150, 15" TC-3000, 2 Alpine PDX-1.1000, 470Amp HO Alt.

I got the amp out of safe mode and after I set it to the setting you guys gave me I got little sound. It also started clipping at even lower volumes. If my fuse is at too low of an amperage would that limit current flow. It startes to clip when the m1000 tries to pull more than 60 amps. I discovered there is a 60 amp fuse in the fuseholder and will be replacing it with the recommended 80amp fuse to see if that helps.

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Alpine cda-9855
Alpine Mrd-m1000
1 farad digital Rockford cap
2 Treo SSi 12's
Large centerport box

Do you have an alpine dealer in town? If so, please get it re-installed there.  You have so many variables that you could have wrong, and since that thing is a dang computer you gota know what your doing.  You probably have a crappy ground for one, you could have a shorted wire, shorted rca, messed yup subs, anything, , we will be here trouble shooting for a year.  We have already gone 2 pages into this thread and by that point if its not set up its time to get a pro involved, sorry, but we can only do so much without actually playing with the amp ourselves.

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2003 Chevy Avalanche,Eclipse CD7000,Morel Elate 5,Adire Extremis,Alpine PDX-4.150, 15" TC-3000, 2 Alpine PDX-1.1000, 470Amp HO Alt.

The alpine delership said I needed a bigger alt(bullsh!t), My ground is ZERO ohms, my rca's are fine, I have a kicker 200.2 that I used for a couple days on the same wiring and it sounded good, my amp has already been sent to alpine and they said there was nothing wrong with it, my subs test 3.9 ohms each.

The one wierd thing is that I have a digital cap and the amp sounds fine until the cap voltage drops below 14.0. At 13.9 it starts clipping. It also starts clipping at exactly 60.2 amps currrent draw.

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Alpine cda-9855
Alpine Mrd-m1000
1 farad digital Rockford cap
2 Treo SSi 12's
Large centerport box

Okay, then.  Take the cap out and see if the problem disappears.  It wouldn't be the first time I've seen something like this, and I'm sure plenty others have as well.  I think you've isolated your own problem as a defective cap.

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My ex once told me I have a perfect face for radio.

the problem was before and after the cap, I will remove though and see if the bug lives on. Would haveing a fuse that is too small restrict power flow.

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Alpine cda-9855
Alpine Mrd-m1000
1 farad digital Rockford cap
2 Treo SSi 12's
Large centerport box

If you use a fuse that's too small, it can blow when you try to push the amp near it's limits.

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My ex once told me I have a perfect face for radio.

Would the fact that it plays long drawn out bass decent(but still clips at high volumes), and the fact that it will hardly play a rock bass line that is more up tempo give you guys any ideas.

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Alpine cda-9855
Alpine Mrd-m1000
1 farad digital Rockford cap
2 Treo SSi 12's
Large centerport box

hmmm....try a new ground. Even if your ground is 0 ohms, it may only be able to run 60 amps through it. That amp is gonna pull WAY more than 60 amps (my MRD-M501 has 60 amp fuse on it!)

also, dissconnect your subs from your amp, and measure the resistance there. if it's less than 2 ohms, you've got your speakers hooked up wrong (although that amp should be able to handle 1.5, but we won't get into that)

also...may be checking the obvious, but is the sub output on your HU turned on?? It's worth a try...

-Drew

Its impossible to have a 0 ohm resistance in the truck of your car, your ground it either so bad it didn't read it on the meter, or you tested it wrong.

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2003 Chevy Avalanche,Eclipse CD7000,Morel Elate 5,Adire Extremis,Alpine PDX-4.150, 15" TC-3000, 2 Alpine PDX-1.1000, 470Amp HO Alt.

What is the best way to make a good ground connection. The way I have it now is a gold ring terminal with two stingers through the ring and one stinger that goes through the terminal and into the metal trunk floor. Is this ok or do you recommend a differnt route. And thanks for helping me fight trough this guys

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Alpine cda-9855
Alpine Mrd-m1000
1 farad digital Rockford cap
2 Treo SSi 12's
Large centerport box

ground there sounds ok, i would try and find something like a bolt that is ment for somethign sturdy, so you know it's close to the frame, keep it as short as possible, and a ground will measure 0 ohms through a 22 gauge wire on an ohmeter, you have to relize that this is 0 ohms at .005 amps, step that up times 100 to even 5 amps, and see what you get,, probably a little higher, now think that that amp is pulling atleast 60 -80 amps,,, so ohmeters are really irrelivent in this situation,

try replacing your rca's, or even try pulling another car close and running rca's out of it, to make sure it's in the amp not the cd player... also, make sure your subs aren't out of phase, or that one of the voice coils isn't backwards, you sound like you have done this before, but we all make stupid mistakes sometimes, check the simple stuff, dont' always assume you did everything right, cause you never know

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