oortone

OK, no the foam is fine. Did have to replace it on the bass elements though. A swap is a great idea. Will try that next time I'm in service mode (mood?).

Thanks ra.ra, will follow that link. Interesting to see that the P4S exists. I have the save midrange in both speakers, but of course some one could have changed both at the same time from original. I'm not sure what you mean by foam but there could be a slight alignment problem for sure. I've had headphones (Sennheiser HD540) doing the same thing.

Thanks for the information. The elements in my speakers are definitely 4 ohms and as you can see from the rear shot (the top one is the original from the speaker) they are called "AD5061/M4 2422 257 35511. The only number different in the one I thought would be an exact replacement is as you can see the last one; 35501 instead of 35511. I find this very strange. Almost makes me wonder if the ones in the speaker have specially made cones. Even stranger is that when I managed to get in touch with someone at Audio Pro support who know about these old speakers he said the correct component number should be AD5061-P4S. And this is an element I can't find at all, not even a datasheet. However, the element I wanted to change is not really broken. Mostly it sounds nice but every now and then it will get stuck and I need to turn up the volume for a short period and then they will work again. Sometimes for months. I can indeed certify theses speakres sounds great. The bass system is made of two elements, one facing up and the other facing down. I believe ACE has something to do with controlling the relation between acoustic and electric impedance to get a flat response.

Hi! I have Swedish active speakers Audio Pro 4-14 and since one of the midranges tends to get stuck from time to time I managed to find a replacement on eBay. The elements are Philips AD5061/M4 but as shown on the picture, the replacement has an "extra cone" (looks older too). Can anyone tell what the purpose of the extra one is and if it will color the sound differently than the original.