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'84 Klipschorn bass issue

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OncleJulien

New Member
Hi, new poster here, starting off looking for some DIY advice.

I have a set of 1984 Khorns with AK-2 crossovers, and either one of their woofers has failed, or together they sounded so good since the day I bought them, that I never noticed. I've done what I believe to be standard troubleshooting steps - swapped cables, swapped amps, reseated everything in the chain, etc. These are steps I would take with any component, but what are some Klipschorn specific steps that I can take?

These speakers came from an estate sale and have likely not been touched in any way since purchase, so there very well may be things in need of replacement or updating, but they really have sounded so huge and beautiful since first firing them up, that I never thought seriously about having them serviced. I don't have a deep understanding of the network crossovers themselves, but are there some connections I could focus on that might lead me to a solution here? I don't want to first assume it's the woofer at fault when it's just a likely something in the wiring.

Thanks in advance!
 
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I can indeed - each is snug to its respective corner.

I also took the time to detach each speaker's head, and swap them, to determine if the issue is crossover related, but the issue remained on the same speaker.
 
OncleJulien said:
I also took the time to detach each speaker's head, and swap them, to determine if the issue is crossover related, but the issue remained on the same speaker.
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So you swapped the top hat of the speakers that contain the tweeters, squawkers, and crossovers from one side to the other?

I suspect that you did from your description, but did you double-check the connection at the problematic woofer? Were the speakers working correctly in-place in corners and one woofer suddenly quit working? Were the speakers moved or other changes made to upstream electronics immediately preceding the woofer not working?
 
Post photos of the crossover connections. Is this a sudden/new problem? Is any sound coming out of the bass bin at all? What is the nature of the sound? You need to isolate where the problem is. Does it get worse with more volume?
 
Mingo said:
So you swapped the top hat of the speakers that contain the tweeters, squawkers, and crossovers from one side to the other?

I suspect that you did from your description, but did you double-check the connection at the problematic woofer? Were the speakers working correctly in-place in corners and one woofer suddenly quit working? Were the speakers moved or other changes made to upstream electronics immediately preceding the woofer not working?
Click to expand...
Correct, I swapped the tops, issue persisted on the same speaker. Is the connection (apologies) to the woofer the two banana plug cables that extend down from the top hat? If so, I had discoed them when I swapped the tops and then reconnected - issue persisted, sadly.

No changes or moves, but I have a sneaking suspicion it hasnt actually worked since purchase, just when the two are working in tandem, it sounds so good, that i never noticed.
 
You might have a damaged woofer. It’s not difficult to remove and replace. You can purchase one—not that expensive—from Klipsch.
 
I would check the connection from bananas to woofer in case wires came loose in transport or while playing.
 
Check continuity with an ohm meter is the best way to tell if the speaker OK. I seriously doubt the speaker has failed but anything is possible. More likely bad connection somewhere. Check all connections is what I would do.
 
I have my LaScala's fused with a common 1 amp fast blow for protection. Easier and cheaper to replace a fuse vs components if something goes wrong with your amplifier. If you blow a 1amp fast blow fuse listening to music you are listening way too loud with our efficient speakers. Not going to happen with normal home use. Some may say you reduce the performance of the speaker using a 1amp but I have never heard a difference. Might see a slight difference on lab equipment but doubtful anyone can point to a difference in a blind listening test.
 
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