Advice from people who know. Setting up a build

[Coupe 10+ year member]

I have a Alpine MRD-F752. I bought it on Ebay many years ago but never had a build. It is a 5 Channel 1 Amp Solution. This thing has crazy power. Just to give you an idea it is rated at 75x4 @ 4 Ohms and 250x1 @ 4 Ohms. This is the actual ratings most of them put out!

Anyway. I bought a set of Infinity Kappa 6 x 9 for the back and a Infinity Kappa Perfect 5 1/4 component for the front. The 6 x 9 were 2 ohms but they were supposed to take 120 watts which is clearly right around the amp power (which is 100 watts @ 2 ohm spec - translate to maybe 120-125 watts). The front Perfects were 110 watts, which also was more than the amp was supposed to put out even with the fact that the amp powers more than its specs.

Needless to say this Amp TORE through all 4 speakers and blew a hole in the rubber of my Eclipse Aluminum 12" sub (although that was a mounting problem where the bass made the box jump and fall on its front)

I spoke too much, I realize also I might have to under power my amp so I do not blow my speakers in the future. (ugh and my gain was about 80% not full blast)

If you guys could help with recommendations for a front 5 1/4 component and a rear 6 x 9 or should I get the brackets and put rear 6 1/4 or go full 6 1/4 component. My price limit is approximately $400, unless persuaded //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

Click to read more...

 

[mapolley07 10+ year member]

your gain shouldn't be set at 80%......did you just turn it up and go? you are supposed to set gains with a multimeter or an oscilliscope

 

[Anniku989 10+ year member]

Stick with the boner

Rsd's in front

and um... RE SR for sub?

 

[Coupe 10+ year member]

your gain shouldn't be set at 80%......did you just turn it up and go? you are supposed to set gains with a multimeter or an oscilliscope

I do have a nice fluke multimeter. Can you tell me what we need to do for the future?

 

[Coupe 10+ year member]

Stick with the boner Rsd's in front

and um... RE SR for sub?

Stick w/ the boner? I'm a car audio newb, so what you mean? I'm not worried about the Sub right now it still punches enough till it blows. I'm trying to spend about 400 on the speakers, the sub can wait.

 

[dragnix 5,000+ posts]

Phoenix Gold RSD components is what he means

 

[shortyg83 10+ year member]

First fix your gain. Do a search on how to set gains correctly. 80% would most of the time mean clipping. Well unless. your preouts are something like .75v

 

[Coupe 10+ year member]

Phoenix Gold RSD components is what he means

Ahh I see. I looked them up they are pretty moderately priced, but do you think they can handle the power of the amp?

 

[dragnix 5,000+ posts]

Ahh I see. I looked them up they are pretty moderately priced, but do you think they can handle the power of the amp?

yes

 

[dragnix 5,000+ posts]

First fix your gain. Do a search on how to set gains correctly. 80% would most of the time mean clipping. Well unless. your preouts are something like .75v

x2, this is how you blow equipments

 

[Bigbear 10+ year member]

i used a 50hz tone i think to set the gain. you can dl the tone at realm of excursion forum!

 

[dragnix 5,000+ posts]

why a 50hz tone? He's not going to use subs yet

 

[Coupe 10+ year member]

First fix your gain. Do a search on how to set gains correctly. 80% would most of the time mean clipping. Well unless. your preouts are something like .75v

Oh yeah I did set the gains till i heard distortion then pulled them back down. I was just guessing about 80%.

This is my head unit.

KD-NX5000

So you guys are recommending phoenix gold RSD for the 5.25 component fronts and for the rear what do you recommend?

 

[UCF52 10+ year member]

Needless to say this Amp TORE through all 4 speakers and blew a hole in the rubber of my Eclipse Aluminum 12" sub

Just to be clear, the amp did only what the user told it to do - It doesn't have a mind of it's own. The gains plus the volume knob on your deck blew your drivers. Search on how to set your gains before you spend any more money.

you are supposed to set gains with a multimeter or an oscilliscope

or by ear //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[MisterGrubbs 5,000+ posts]

I personally say that you should opt and spend a tad more money and get the new 720 Pioneer Components.

And, if you have the means, upgrade to a 6.5". All you should need is a MDF spacer.