Quiet tweeters--resistance question

[1trkpny]

Hello all. I have some Diamond Audio Dn 24x component speakers that I am installing in a new car. (Blast from the past--I originally had them in a Mustang in 1996.) they worked great back then, but I am having problems with them now. The woofers sound fine, but the tweeters are so soft that I can barely hear them at all.

I tested the wiring to the tweeters for continuity and all is good. Then, I checked the resistance. It is 8 ohms. The woofers from the set are 4 ohms. Aren't car speakers supposed to be 4 ohm?

I am currently just using the built-in amp in my Alpine head unit, but I am about to hook up my Phoenix Gold Sapphire amp--will that make a difference? The Alpine is 15W rms. The Phoenix is 60W rms. I am using the passive crossovers that came with the Diamond components, and I have the tweeters set to 0dB attenuation. The "rear" outputs are not being used and are set to "off."

What am I missing, here? The tweeters don't sound blown, just extremely quiet. Any suggestions would be greatly appreciated.

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[Canaan 10+ year member]

How are you tweeters mounted in the vehicle?

Are they on axis with the listening position?

 

[1trkpny]

Canaan,

They are mounted in the original dash position, which fires directly upward into the window. //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif In order to try to troubleshoot the problem, I took the tweeters out, hooked them up with a short section of speaker wire and held them to my ear. I could still barely hear them. I even took the crossover out of the equation and hooked them directly to the output from the head unit, but the result was the same.

The only difference I can think of from when they worked before is that they were hooked up to the larger amp--but they are supposed to be matched pairs with the woofers, so how could the extra wattage account for so much negative attenuation?

 

[CrossoverOre 10+ year member]

what kind of vehicle?

 

[maylar 10+ year member]

Hooking tweeters directly to the HU without a crossover could blow them instantly...

 

[keep_hope_alive Premium Member]

it's possible you have a bad connection in the crossover.