EricN CX-7 Build Log

[mjf 10+ year member]

For the tweeters? You can pick them up at most hobby shops, they are frequently used on RC car Batteries.
Jay

good enough, thanks

 

[ericnord 10+ year member]

Yep, they are called Deans connectors. I also used some gold bullet connectors from the Hobby Shop for the HU quick connects.

 

[JayinMI 10+ year member]

[thread=hijack]Hey, Eric, you got any RC cars, or did you just find those connectors through some other means? If you have any, whatcha got?

[/hijack]

Jay

 

[ericnord 10+ year member]

Hey Jay,

I use to do cars and helis, but no more!

 

[ericnord 10+ year member]

Ok, I'll have pics later, but as of right now judgement day didn't turn out so well. I have the amp rack in and all pwr/grnd/rmt/rca/Ai-Net wires run and all the amps and PXA-H100 are getting a good 12v w/ the car on, but engine off. Problem is I'm not getting any signal I know this because when I went to set gain on amps I only get milivolts at 75% volume out of the speaker terminals, so I plugged in a speaker and there is nothing.

So it seems I need to troubleshoot the signal system, so I have 9886 giving signal to H100 through the Ai-Net. There are no RCAs connected to the 9886. The 9886 sees the H100 because the expanded Imprint options appear. The H100 is giving signal to the amps through some Monster Home Theatre RCA (didn't have time to make my own yet). This seems pretty simple, so I'm assuming there is a setting or dip switch somewhere that is not correct. I left the dips on the 9886 at Norm instead of the Ext AP (or whatever it is).

Any ideas here?

 

[JayinMI 10+ year member]

Check your AI net cables. When I had my 9833 and my H700, if you have the inputs backwards I got no signal, same with my satellite radio. Is there an AI net/EQ switch on top of the radio? Mine had one, you might need to flip it.

I have some RC trucks, but that's *another* expensive hobby I don't have money for right now. It's fun stress relief, tho. //content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif

Jay

 

[ericnord 10+ year member]

Thanks, that got the signal going, but now my tweeters are acting weird.

When I play the 1khz tone they can't be heard until the volume gets about 50%, then at 75% one of them starts making a faint pulsing sound while still playing the tone, then it pops (clipping I guess).

Mids are good and loud below 50%. Tried the tweets on the mids amp and exact same thing, so it isn't amp.

Put in the IASCA test disk and the guys voice is not at all correct. Sounds like he is far away and it is also hard to understand through the tweets. When you turn up the volume, a white noise type sound increases at a greater rate than the voices. It sounds as if it thinks it is really loud!

Thoughts?

 

[ericnord 10+ year member]

Gonna need to throw in the towel now as I'm out of my league when it comes to problem solving this setup:

http://www.caraudio.com/forum/showthread.php?t=355243

 

[helotaxi 5,000+ posts]

You don't use the 1khz tone on the tweets as that's out of their passband. Try 5khz for the tweets.

 

[ericnord 10+ year member]

Ok, I'm not going to be able to mess w/ the car anymore this week w/ work schedule, but I'll try 5khz this weekend.

 

[ericnord 10+ year member]

Today's update!

Was gone all week for work, but Glen305 and SublimeZ were nice enough to give me some of their time today and help me get things going.

The 'pulsing' noise coming from the tweet has been narrowed down to either the offbrand AI-Net cable or the HU. I'm going to try the Alpine branded shorter Ai-net cable to see if that is it. Otherwise I may go for the 9887 and sell the H100.

Other than that Glen205 helped me set my crossover points and I'm at a good place to start fine tuning.

Here is a pic of the bottom of the floor installed. I'll get a picture of the top piece w/ the sub on it this week:

 

[ericnord 10+ year member]

Ok, so the 'pulsing' sound I was getting out of one of my tweets has been isolated to the Ai-Net replacement cable I bought from eBay (haven't been using the factory cable at all since it is only about 6 feet:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&ssPageName=STRK:MEWNX:IT&item=120311409367

So do I get this and use it to extend the factory:

http://www.crutchfield.com/S-W1tsJNbRPGR/App/Product/Item/Main.aspx?i=127ALPEXT

Or do I get this:

http://www.woofersetc.com/index.cfm?fuseaction=product.display&product_id=6228