Alpine Head Unit

[RobertJr79]

I have a Alpine CDA-9827 head unit and I was told to turn the sub volume up to +15 to make the rca 4 volts, is that true?

I did a quick Google check and found this:

http://www.caraudio.com/forums/head-uni ... stion.html

So do I need to go up to the +15 on my H/U then set my gains?

Is anyone using Alpine as a deck?

[zeropoint0.5]

if you set you're gains at sub volume 0 or 5 , when you push them at volume 15, when you let them play in

distortion, you can damage them or blow them up !!!! So yes, set you're gains with sub volume at 15 !!!

[RobertJr79]

if you set you're gains at sub volume 0 or 5 , when you push them at volume 15, when you let them play in

distortion, you can damage them or blow them up !!!! So yes, set you're gains with sub volume at 15 !!!

OK I will re-set the gains tomorrow after I install the LPL, I don't play them with the h/u at +15. I play them with +6 to +8, but I set the gains with the h/u set at 0. I was told to set the gains with everything set at 0 on the h/u and then set the h/u after the gains are set. But I guess I was told wrong, I will do it again tomorrow.

EDIT: With the LPL do I leave it all the way down or turn it up?

[Drock]

The way I set gains, is to turn everything flat at the H/U. And amp gains all the way down.. Turn your H/U to full volume and then back it down a couple notches. This should basically eliminate any distortion. Now you can adjust your amp gains until you hear some distortion and them back it down a couple notches. Now you can play at full volume and it should be nice and clear. Next you can play with your settings to your taste.
Hope this is what you were looking for..

I'm sure there are other ways, but this works well for me.

[RobertJr79]

The way I set gains, is to turn everything flat at the H/U. And amp gains all the way down.. Turn your H/U to full volume and then back it down a couple notches. This should basically eliminate any distortion. Now you can adjust your amp gains until you hear some distortion and them back it down a couple notches. Now you can play at full volume and it should be nice and clear. Next you can play with your settings to your taste.
Hope this is what you were looking for..

I'm sure there are other ways, but this works well for me.

Thats how I normally do it, but I was reading that Alpine deck the sub volume need to be at +15 to get the 4 volts output. That is my main question does the head unit need to be at +15? I go 30 out of 35 on the Alpine head unit, but I normally play at 26-28 most of the time. I go up to 30 when someone want to listen to it. So the lpl when I set the gain is all the way down or up?

[Starunit10]

does changing the sub volume to +15 only make the sub RCA 4 volts or does it make all preout 4 volt at the same time? I running an alpine as well, was never my deck of choice, but I got it very cheap. Didn't even know the sub volume went up, what a difference it makes ! Thanks Robertjr79 !

[zeropoint0.5]

if you set you're gains at sub volume 0 or 5 , when you push them at volume 15, when you let them play in

distortion, you can damage them or blow them up !!!! So yes, set you're gains with sub volume at 15 !!!

OK I will re-set the gains tomorrow after I install the LPL, I don't play them with the h/u at +15. I play them with +6 to +8, but I set the gains with the h/u set at 0. I was told to set the gains with everything set at 0 on the h/u and then set the h/u after the gains are set. But I guess I was told wrong, I will do it again tomorrow.

EDIT: With the LPL do I leave it all the way down or turn it up?

i would never use both an lpl44 and sub level control.....the one or the other......

the bottom line is, once you've set the gains to it's max output, you should be aible to boost up that signal any more......

Same story with a PG bass cube, put the basscube totally open and adjust the gains of the amp.

although, this is the way i do it or should do it.....


there is one exeption for this all. if you wanna boost up the bass at lower volume levels...

but here you have the risk, once you play at max volume and (somebody else) turning up the sub volume, you can

blow up the sub...... so better be safe then sorry......

[RobertJr79]

does changing the sub volume to +15 only make the sub RCA 4 volts or does it make all preout 4 volt at the same time? I running an alpine as well, was never my deck of choice, but I got it very cheap. Didn't even know the sub volume went up, what a difference it makes ! Thanks Robertjr79 !

I'm not sure but from what I read online when the sub volume is at +15 its like having it set at 0db. Its alpine way of doing it from what I read. I know if I have the sub volume at 0 I have to turn the gain up and with it at +6 to +8 I could have the gain set lower and it sound so much better.

This is what
I found on other sites and I quote,

"alpine decks are design to have 4 volt at level 15 and anything lower will be under 4 volts."

"Alpine's bass control is made where the highest setting is 0 DB.

In other words, +15 IS "0"."

As far as I can tell it only makes a difference on the sub out.

[RobertJr79]

if you set you're gains at sub volume 0 or 5 , when you push them at volume 15, when you let them play in

distortion, you can damage them or blow them up !!!! So yes, set you're gains with sub volume at 15 !!!

OK I will re-set the gains tomorrow after I install the LPL, I don't play them with the h/u at +15. I play them with +6 to +8, but I set the gains with the h/u set at 0. I was told to set the gains with everything set at 0 on the h/u and then set the h/u after the gains are set. But I guess I was told wrong, I will do it again tomorrow.

EDIT: With the LPL do I leave it all the way down or turn it up?

i would never use both an lpl44 and sub level control.....the one or the other......

the bottom line is, once you've set the gains to it's max output, you should be aible to boost up that signal any more......

Same story with a PG bass cube, put the basscube totally open and adjust the gains of the amp.

although, this is the way i do it or should do it.....


there is one exeption for this all. if you wanna boost up the bass at lower volume levels...

but here you have the risk, once you play at max volume and (somebody else) turning up the sub volume, you can

blow up the sub...... so better be safe then sorry......

I thought a bass cube you select a frequency between 20 and 110 Hz and apply a gain from 0 to 15 dB on that band and had nothing to do with the gain amp the amp.

[paintguy]

I'm not sure but from what I read online when the sub volume is at +15 its like having it set at 0db. Its alpine way of doing it from what I read. I know if I have the sub volume at 0 I have to turn the gain up and with it at +6 to +8 I could have the gain set lower and it sound so much better.

This is what
I found on other sites and I quote,

"alpine decks are design to have 4 volt at level 15 and anything lower will be under 4 volts."

"Alpine's bass control is made where the highest setting is 0 DB.

In other words, +15 IS "0"."

As far as I can tell it only makes a difference on the sub out.

What you have read is correct, as far as my understanding goes.

The control is very misleading I'd say. +15 isn't boosting anything, it's just giving maximum output. Anything less than 15 is attenuating the output. It would make much more sense if it went from -15 to 0, but I guess that wouldn't sell so many decks....

[RobertJr79]

I'm not sure but from what I read online when the sub volume is at +15 its like having it set at 0db. Its alpine way of doing it from what I read. I know if I have the sub volume at 0 I have to turn the gain up and with it at +6 to +8 I could have the gain set lower and it sound so much better.

This is what
I found on other sites and I quote,

"alpine decks are design to have 4 volt at level 15 and anything lower will be under 4 volts."

"Alpine's bass control is made where the highest setting is 0 DB.

In other words, +15 IS "0"."

As far as I can tell it only makes a difference on the sub out.

What you have read is correct, as far as my understanding goes.

The control is very misleading I'd say. +15 isn't boosting anything, it's just giving maximum output. Anything less than 15 is attenuating the output. It would make much more sense if it went from -15 to 0, but I guess that wouldn't sell so many decks....

Thanks for the info, thats also something I had read online but didn't remember where I saw it. Well I didn't set the gains today, but tomorrow I'm setting it with +15. I read too much to ignore the +15 is 0db and with out it I'm not getting the 4 volts output.