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Tweeter Question?

561 Views 7 Replies 3 Participants Last post by Frank_Powers, Apr 6, 2015

Frank_Powers

Discussion Starter · Apr 6, 2015

1st post here. I recently purchased a set of the
Radio Shack 40-1310 Horn Super Tweeters on ebay to brighten up the sound a bit on a stereo system I'm putting together. I had a set of these back in the late 80's and 90's that worked very well. The pair I purchased sound pretty bad, a very scratchy annoying sound for the most part. I can muffle them somewhat by covering the front of them and the EQing out most of the annoying sounds but it ain't right. I was told the tweeters were not blown if they work at all and that the crossover is probably bad, So I would like to know from you guys if this is good info, and if so how do I replace the crossover,,,,, and for that matter select the size I need? I'm looking for that sizzle up on top from the cymbals and high hat work mainly. I was a drummer for many years and so I know there is sound up there that I am not presently hearing, so any help would be greatly appreciated.

BTW, great forum you guys have here, very interesting,,,,,,,

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FMW

· #2 · Apr 6, 2015

How would you replace the crossover? You would need to design a new one that handles the tweeters. A speaker system is designed for particular drivers to be managed by particular crossover network designed for those drivers and an enclosure calculated and built to optimize the drivers and crossover. Tossing in new drivers or a generic crossover will product acceptable results only rarely.

Not a project destined to accomplish anything useful. i recommend you abandon it.

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Frank_Powers

Discussion Starter · #3 · Apr 6, 2015

Ok, maybe the capacitor is what I was told may be blown. I'm not building speakers, just adding a little brightness.

This article
http: //diyaudioprojects.com/Drivers/40-1310/40-1310
speaks exactly to what I am referring,,,,,,,,, I just don't know if the scratchy sound is from a blown tweeter or an electronic malfunction in the tweeter.

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Frank_Powers

Discussion Starter · #4 · Apr 6, 2015

Just to clarify a little,,,,, I have Cerwin Vega DX-7 speakers driven by Onkyo receiver and CD player. It's a good sounding little system, but I'm almost 60 years old and have been a part musician for the better part of my life as well as an aerospace Machinist for 40 years, so the hearing isn't what it once was. I am only looking to add a little brightness up on top that I know is there. I can get the frequencies with my eq, it's just that the particular pair of tweeters I purchased do not sound right. So I would just like to know what MAY be the cause, and a possible remedy.

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zieglj01

· #5 · Apr 6, 2015

The crossover is inside the tweeter - you have to unscrew it
That is a somewhat nasty tweeter to begin with - you can raise the crossover higher
with a mod, so that is will not play lower.

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Frank_Powers

Discussion Starter · #6 · Apr 6, 2015

zieglj01 said:
The crossover is inside the tweeter - you have to unscrew it
That is a somewhat nasty tweeter to begin with - you can raise the crossover higher
with a mod, so that is will not play lower.

OK, so it sounds like the nasty scratching noise is from the lower frequencies that the tweeter is allowed to play as is, so a capacitor that only allows higher frequencies would filter the scratchy lower sound out? Just trying to understand,,,,,,,,,,

In my second post I referenced some info on this particular tweeter I found and the poster mentioned,,,,,,,

"Once the cross-over point is set to about 10 kHz or higher, the tweeter sounds pretty good. The new tweeter cross-over is a simple first order cross-over with 0.47 + 0.22 uF of capacitance."

So do I assume that this is the cap I need to shoot for, or higher?

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zieglj01

· #7 · Apr 6, 2015

Frank_Powers said:
OK, so it sounds like the nasty scratching noise is from the lower frequencies that the tweeter is allowed to play as is, so a capacitor that only allows higher frequencies would filter the scratchy lower sound out? Just trying to understand,,,,,,,,,,

In my second post I referenced some info on this particular tweeter I found and the poster mentioned,,,,,,,

"Once the cross-over point is set to about 10 kHz or higher, the tweeter sounds pretty good. The new tweeter cross-over is a simple first order cross-over with 0.47 + 0.22 uF of capacitance."

So do I assume that this is the cap I need to shoot for, or higher?

Yes, I read that link - and I remember them tweeters from the past.

However, no one can 100% guarantee that this will solve the whole issue
However, I would start with this - caps are cheap.

If you still have a problem after that - then the source lies somewhere else.

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Frank_Powers

Discussion Starter · #8 · Apr 6, 2015

zieglj01 said:
Yes, I read that link - and I remember them tweeters from the past.

However, no one can 100% guarantee that this will solve the whole issue
However, I would start with this - caps are cheap.

If you still have a problem after that - then the source lies somewhere else.

Yeah, I understand that,,,,,,,

Thank you for your attention and patience. You've been very helpful.

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