Problem with New CDA-9887

[aeon 10+ year member]

maybe you're getting a low reading when going 3-way because the rear preout are for the tweets?

 

[amedeuce 10+ year member]

maybe you're getting a low reading when going 3-way because the rear preout are for the tweets?

Yes, that is what I meant here.

I'm thinking this is the way alpine has it set up, so you are supposed to run the tweets off the rear channels.

I'm getting so confused because I think that the voltage is sparatic and this is throwing me way off.

I've tested this with my 9833, so I think in 3-way the voltage is reduced to 24mV.

On the 9833 it's the front preouts that are affected and on the 9887 its the rear preouts.

However, as I'm reading voltage on the rca cables themselves, I'm getting -

on the rear rca cables red one is "sometimes" .863 and the black one is 24mV, but it isn't consistantly like that and it changes when I swap the red/black.

On the front channels sometimes both read 1.927 and the red always reads that but sometimes the black reads .863.

 

[aeon 10+ year member]

oh sorry, i didn't read through the whole thread.

 

[amedeuce 10+ year member]

oh sorry, i didn't read through the whole thread.

not a problem. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[nismos14 5,000+ posts]

Yea but it doesn't specify which is whch for active xover right?

 

[amedeuce 10+ year member]

Yea but it doesn't specify which is whch for active xover right?

Not specifically, but if you read into the T/A (time alignment) settings, the L-F (left-front) is the inital setting and it show that to be Mid Left.

if you look on page 18 about adjusting and storing the time correction.

Look at number 3.

2.2 channel (3 way) system

L-F ----->R-F--- L-R-->-->R-R

(mid-L) (mid-R)-(high-L)-(High-R)

 

[amedeuce 10+ year member]

So to me that would make sense to put the tweeters on the rear channels of the head unit, less voltage. Right?

However, mine is still screwy, but that's besides the point here. So I did change my amp gains and swapped everything to have the mids on the front channels and the tweeters on the rear channels.

 

[aeon 10+ year member]

i had that problem mixing up the front and rear. i had no mid bass at all, just highs playing from the mids and tweets. switched the rca cables and everything just came alive.

 

[amedeuce 10+ year member]

i had that problem mixing up the front and rear. i had no mid bass at all, just highs playing from the mids and tweets. switched the rca cables and everything just came alive.

I did that as well, I just hope that the new unit I get doesn't act the same way and it's just something I'm doing wrong. I really don't think so though.

I wish alpine would have just left the preouts as they have always been.

Front on top rear in middle and sub on bottom. And I've always put the tweets on the front and mids on the rear channel of the amplifier, guess not anymore with this unit.

 

[amedeuce 10+ year member]

I finally figured it out what's wrong with it!!! 400 dollars and I have to deal with this!!

I've narrowed it down to one preout.

One of the preouts in the middle set which on this unit is the fronts.

So it's the front left - the white preout.

This is what is wrong and why I had a hard time figuring it out.

If I push the rca cable in like everyone else in the universe does, all the way,

this would caused the voltage to be just about half. If I slightly pull out on the plug the voltage would be fine, but it has to be perfect, not to far in or to far out.

I tried this with several rca test plugs. Plus once plugged in all the way, voltage at half and the plug wiggled at all the voltage would go to almost zero.

With the plug pulled partially out and reading full voltage, if the plug is in anyway wiggled, voltage drops off.