Deang

Yes. Check out the AK vs. the AK-3 When I figured this one out I started pushing AK-2 users backwards instead of forwards. They only have to change two parts and never have to open the door to the woofer chamber. Those big film caps are fine, and you run into more trouble and hassle by breaking the airtight seal.

@JRH @Chief bonehead @Trey Cannon

People do change their mind about things, and I’m sure PK was no exception. There is no growth without adjusting your position as you are presented with new information. I have a hardcopy around here somewhere from Klipsch Engineering on the K-401. If I can find it I will screenshot it.

You’re not allowed to measure stuff anymore, lol. I was talking to JEM the other day, who mentioned that the AA was designed to work with the Alnico K- 77, and doesn’t sound particularly good with the EV 77-M. It was an interesting discussion. With that said, I don’t think I have ever seen a plot like that before.

If you are going to sell them, I would fire them up and listen to them. If they sound “okay”, just leave them alone. Most think those old cans are paper in oil (they’re not), and you might be better off selling them as they are. Updating them may actually hurt your resale value. Don’t ask, we know it doesn’t make sense.

Hi @Ed WolinskiAre you keeping these or selling them?

Yeah, replace them now and you don’t have to think about anymore. Henry is right, they are probably not “bad”, but they are certainly on their way out. Jim did a nice a job on that page. We speak often and we are very much aligned.

Eminence makes drivers for a lot of companies. Like I said, what it looks like has no bearing on compatibility with your cabinet. BTW, RoHS is not a company, it’s a compliance standard.

I’m guessing this was one of those deals where you jumped out of your skin and made a dive for the volume control? If so, you may have lost a woofer or two.

They may not look the same, but what matters are the specifications (t/s parameters).

If loosening and tightening the screws, which is really just done to ensure a good connection - didn’t bring the highs back - then you should probably just go ahead and replace the capacitors.

I misread something earlier that just made me want to bow out. I thought he said he got a reading from his RF-7 high pass with the straps removed, which really confused me. I don’t like internet troubleshooting, especially when there’s no problem!

Great, another screw problem.

What year?

You can also get them at https://reconingspeakers.com/products-page/klipsch-k-33-e-woofer-121501/ As for the network, just think of it as preventive maintenance. Even if the capacitors are mostly okay, and many are - they are aging out. Best just to get it over with. This makes more sense then measuring every 40 year old capacitor and trying to decide if you should change it or not. The upgrade path is to go to the AL-3, but since you are selling these ...