I have 4 Infinity Kappa 680.9CS Component sets in my 2004 Mach 1. They are 2Ohm each, driven by an MTX Jackhammer 404 (100WRMSx4@2Ohm).

Each set has a solid connection from the amp to the crossover with 10AWG, and then 10AWG to the 6x9s and 14AWG to the tweeters.

My driver's side tweeter emits a static, sometimes "tinny" sound when the volume is cranked. The gains are set conservatively and all of the electrical connections are solid. The amp is grounded very well to the chassis with large wire, no RCAs are run near power wire, and it only happens when there is alot of voice and instruments playing at the same time. I swapped tweeters and crossovers, but it did not solve the issue.

I do have the switch on the crossovers set for -6dB because the tweets can get loud.

The noise is present regardless of what the RPMs are and regardless of whether or not my 12" subs are turned on, so I dont think their amp/wiring is introducing any noise into the system.

Any ideas?

Thanks!

 

so like a staticy poping noise?

 

When you switched crossovers/tweeters, are you saying you swapped left/right? You said it didn't solve the problem, but does that mean the static remained on the same side, or did the static move to the other side?

 

infinity has always been known for having a very rich and bright tweeter. What kind of music are you playing? How close to max volume is it when this happens? What are the bass/loudness and treble controls set at? Try tuning them down and see if it helps.

 

Could not agree more.

The infinity tweets my wife used to have in her sebring were the "brightest" tweets I have ever owned and I very much prefer a "laid back" sound. Some, including myself, would call infinity tweets harsh. (Like they make your ears hurt when you listen for a long time"

After you run through what Scott laid out, you could try swapping the polarity of the tweet and see if that helps.

 

i have had that problem before to with a set of ref 6x8 components

 

i forgot what i did to fix the problem

 

When I swapped out the tweets and then the crossovers, the static noise stayed on the front right channel.

Sometimes the sound is static, other times it is "metallic" if that makes any sense.

My headunit EQ is flat, the crossovers are set at -6dB, the gains are conservatively at 3V (headunit 1.5V), and it occurs when I crank it up to 25-30 (Headunit goes to 35, so this is 75-85%).

I find it strange that only this channel behaves this way, but I can't find any pinched wires or loose connections.

It happens when I listen to music with alot of things going on at once, such as Linkin Park with instrumentals, vocals, and screaming all at the same time. It's like there's too many sounds happening at once so the speaker decides to just produce noise instead.

Regarding the polarity: I noticed that the + on my tweeters and crossover are actually connected through the circuitboard to the - of the feed from the amp. I suppose they are wired in reverse as a way of keeping them from trying to produce low-frequency bass hits?

I appreciate the comments; I am going to put an oscilloscope on the HU to make sure I'm not sending a clipped signal and then I'll use it to double-check my amp gains.

 

it sounds like you just have it too loud and the tweets are not taking it well.

REmember for a silly-scope you will need a single frequency to be played from the deck and it will not really recreat the full range music but may still help

 

All wiring them in reverse will do is cause the speaker to move in the opposite direction.... (In instead of out)

You might try swapping it around. and see if that helps. It is not really likely, but it may do somehting.