GabeS

Is there a good source to buy the diaphragm/gaskets? I don't see them listed on the JEM website. GS

Sorry if this is an ignorant question. I also have a pair of Heresy 3 speakers. I'm guessing they have K-53-TI 1.75” (4.45cm) Titanium diaphragm compression driver based on the spec sheet. It's not possible/advisable to use these in the la scala. Overall the la scala has been a really big improvement over the Heresy. Thanks. GS

Thanks again everyone. I think I will try and order some of the JEM capacitors to see if it makes a difference and possibly switch the midrange driver between speakers to see if I can isolate it to that. Is there anything special I need to do to make that change? If it is the driver are they available to replace (I do see some on ebay) or do people get them repaired and if so is there a good source to fix? I do have a local vintage audio store that I likely could bring it to, but not sure if it would be a very specialized repair. Overall the sounds is great on 95% of the recordings, so I'm not in a rush but I appreciate the help from this group. GS

I really appreciate everyone weighing in and helping me try to figure this out. As I mentioned, the speakers sound great on most songs. Even the distorted songs are only one instrument frequency like a guitar will be distorted in a few parts of the song. The vocal (other instruments) that is playing at the same time won't be. I will try to borrow a friend's Ohmmeter to see how they measure. I did take off the white tape and it seems like the wires are soldered. The same recording will always buzz during the same section - which makes me think a certain frequency is causing something to vibrate. And it does seem to be worse at louder volumes. If it was a bad capacitor could it behave like this or would you expect a more constant buzzing. When I reproduce the sound it sounds like it is coming out of the front of the speaker rather than something I can hear by sticking my head through the back. I can't feel anything vibrating or sounding loud from behind. The screws are all tight. I was also curious what people thought of the capacitors in the picture. Would I be better off trying the capacitors from JEM audio? Appreciate all the help! GS

Here is one more picture. Sorry, running up to the size limit. Maybe there is a better way to post pictures. Thanks again. GSC8B7DB73-A0A9-4152-98E2-4B1618D5A6B5.heic

Thanks for responding! I will try your suggestion of loosening/tightening the screws. I did swap the speaker cables and it is only the one speaker that has the problem. I'm pretty new to this - I don't think I have the Oil capacitors - and I'm not sure what type they are (or if they are good). I'll try to attach a picture. Is it possible that a capacitor problem would cause a problem at just a single frequency/type of sound? Again, appreciate your input. GSC81F430E-0B4A-40F8-AF64-9F9D8084C220.heic

Hello everyone, I recently purchased a pair of vintage 1978 La Scala and overall they sound amazing. I believe they are all original with k 55 v midrange driver and k 77 tweeter and Type AA crossover. On certain recordings (maybe 1 out of 10) I'm hearing distortion from what I assume is the mid-range tweeter. In particular, if distorted piano sound or sometimes guitar comes from that side of the soundstage, it will be prominent. It sounds like an extreme distortion just from the speaker and is usually brief but reproducible on certain tracks. The general soundstage and music aren't distorted - just a distorted sound coming from the speaker. Is there a way for me to figure out what is causing the rattling/distortion? What is the most likely cause? I really appreciate your time and expertise. Gabe