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Troubleshooting/repairing center speaker


AudioHobby
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Hey everyone,

so I bought a used RC-25 center speaker and after some initial testing, it sounds awful. It’s connected to a Denon AVR-X2300W. I bought it to to upgrade from a R-25C but, the treble is really weak.

 

I adjusted a bunch of Audyssey and manual adjustments on the receiver but, the treble is just lacking. I’ll Redo the entire Audyssey calibration tomorrow but, I have a feeling something else is wrong. Maybe a blown tweeter? 

 

Also, I shined some light into the front ports and it looks like foam is stuffed in the back and essentially blocking the ports. That shouldn’t be there right? I’m guessing someone did that to reduce low frequency vibration. However, I wouldn’t think that would effect the highs. Let me know your thoughts. Thanks.

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Leave the foam, it's there from the factory.

 

I'm going to go all-in and say your tweeter is probably fine and the issue is either the metal jumpers that connect the LF and HF at the input terminals are either missing or not tightened down.  If the input wires are connected only to the LF at the speaker inputs you'll only get sound from the woofers and not the tweeter.

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Posted (edited)

Thanks for the reply @wuzzzer. I double-checked the jumpers and they are tight. l also tried switching the banana plugs in either the top posts or the bottom. No difference. Running Audyssey again didn’t make a difference. I think the tweeter is working but, is either really weak or perhaps this center pairs very badly with my other main speakers R-28F’s.
 

  I have since opened up the speaker but, don’t see anything jumping out at me. If I take this tweeter apart, will it ruin it? From the outside it looks fine. Also, the foam looks like it is from the factory, as you mentioned.

 

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Edited by AudioHobby
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5 minutes ago, AudioHobby said:

My multimeter says 2.1 Ohm when I touch against the tweeter connectors. Is that about right?

 

That's crazy low.  I don't know exactly on that one but most Klipsch tweeters are in the 8-16 ohm range. 

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Posted (edited)

In case anyone else is interested, I’ve decided to switch out the tweeter once I find the right replacement in stock. I found other similar conversations about this when I searched the forum. 

Edited by AudioHobby
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