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View Full Version : Alpine 7995 2v sub preout ?



Rob.
12-10-2008, 09:55 PM
I know the 7995 is 4v preout, but I read on another forum that the sub is a 2v preout ? Only the front and rear are 4v....

Is this true ?

What deck has 4v or higher sub preout ?

I ask cuz Im thinking of buying a 7995 and selling my 9873 cd player.

JimJ
12-10-2008, 10:05 PM
It's not like it matters all that much, unless you have horrific noise issues...

Rob.
12-10-2008, 11:20 PM
It's not like it matters all that much, unless you have horrific noise issues...

No but I seem to have to turn up the gain all the way up to get any power to my 10" pioneer IMPP sub !

99grandprixGT
12-10-2008, 11:22 PM
turn the subwoofer control on the deck all the way up then reset the gain.

Brian_smith06
12-10-2008, 11:22 PM
No but I seem to have to turn up the gain all the way up to get any power to my 10" pioneer IMPP sub !

if im not mistaken that is a pretty low end sub? if it is maybe step up in that department a little bit.

Rob.
12-10-2008, 11:24 PM
turn the subwoofer control on the deck all the way up then reset the gain.

The subwoofer control on my Alpine 9873 is all the way up to 15 and the gain on my amp is all the way up.. heck I even have the Loudness button on !

Brian_smith06
12-10-2008, 11:24 PM
enclosure issues maybe?

JimJ
12-10-2008, 11:25 PM
Are you getting any noise on a 0-bit track?

There's nothing intrinsically wrong with having the input gain up, it really doesn't matter where it is, as long as the output is unclipped...

Rob.
12-10-2008, 11:26 PM
enclosure issues maybe?

No. its in a correct sealed box.

Rob.
12-10-2008, 11:26 PM
Are you getting any noise on a 0-bit track?



No..

Im gonna post some pics of my setup..

Rob.
12-10-2008, 11:34 PM
Here's some pics of my lil setup..

bridged (channel B)
http://i38.tinypic.com/vi3095.jpg

gain turned almost all the way
http://i38.tinypic.com/6h8i0w.jpg

my 10" IMPP Pioneer sub in sealed box
http://i35.tinypic.com/p7m11.jpg

my 480 watt Pioneer amp
http://i38.tinypic.com/2hcqgxu.jpg

KyleBechtold
12-10-2008, 11:38 PM
that setup isn't going to produce much.. idk what you might be expecting.. also decks that have higher sub preouts are eclipse!! 5v-8v most of the time

Rob.
12-10-2008, 11:39 PM
that setup isn't going to produce much.. idk what you might be expecting.. also decks that have higher sub preouts are eclipse!! 5v-8v most of the time

I know its not gonna produce much, but I got the amp, sub for free. :D
I just wanted to know if a 4v sub preout would make any difference in output for my sub.

Brian_smith06
12-10-2008, 11:40 PM
it wont make a difference. as long as the gains are set properly it doesnt really matter what your input voltage is

KyleBechtold
12-10-2008, 11:42 PM
higher outputs just mean you can keep your gains down usually keeping the amp cooler... but not a whole bunch.. if you got it free i wouldn't be too worried anywho..

Rob.
12-10-2008, 11:42 PM
what should I set my Low Pass frequency on the amp at ?
And my HPF ?

Rob.
12-10-2008, 11:44 PM
I thought higher outputs give a cleaner, more efficient signal from the amps to the deck ? :confused:

JimJ
12-10-2008, 11:47 PM
I thought higher outputs give a cleaner, more efficient signal from the amps to the deck ? :confused:

Again, if you don't have a noise problem with 2V outputs, going to 4V isn't going to get you anything.

KyleBechtold
12-10-2008, 11:47 PM
yes because you can keep your deck volume down to not distort it.. along with gains.. but only helps if clean signal is present otherwise either setup will be bad

also if thats your sub amp only the hpf should be off... lpf i have mine set at 80 it sounds great.. play with it.. find whats sounds best

Rob.
12-10-2008, 11:50 PM
yes because you can keep your deck volume down to not distort it.. along with gains.. but only helps if clean signal is present otherwise either setup will be bad

also if thats your sub amp only the hpf should be off... lpf i have mine set at 80 it sounds great.. play with it.. find whats sounds best

Im using channel A for my fronts and channel B for my Sub.

Here's a pic of my channel A Gains for front.

http://i33.tinypic.com/ff7595.jpg



Again, if you don't have a noise problem with 2V outputs, going to 4V isn't going to get you anything.

ok thanks. I dont have any noise issues whatsoever.

Brian_smith06
12-10-2008, 11:52 PM
i would probably turn your hpf off and just use hu functions for that same with the sub but thats just me

Rob.
12-10-2008, 11:54 PM
i would probably turn your hpf off and just use hu functions for that same with the sub but thats just me

so turn them both off on the amp ? Why is that ? Any benefit ?