Dear Massimo,
I hope you’re doing well. I wanted to discuss a problem I’m facing and I hope you can assist me with it. A few days ago, I got a great deal on a pair of Box 350 speakers. After using them for a while, I must say that while they don’t quite match the transparency of Box 300, they are still magnificent speakers, and I genuinely enjoy them. However, there’s an issue I’ve noticed – there’s a rattling or buzzing sound coming from both tweeters on certain songs and instruments. It’s particularly noticeable during piano passages, leading me to believe it’s related to overtones. Strangely enough, I had the same problem with Box 320 speakers before. What surprised me is that Box 350 and Box 320 share the same tweeter. On the other hand, Box 300 and Box 50, even though they have the same code on the back, don’t exhibit this problem. Interestingly, Box 50 sounds better than Box 320, with a more transparent and extended tweeter response.
I have done some testing to narrow down the issue:
The buzzing is specific to the tweeters and not present in the woofers.
Even when I remove the tweeter from the box, the buzzing remains.
I have both Box 320 and Box 350 at home, and all four tweeters exhibit the same buzzing problem. It’s hard to believe this is just a coincidence. Could it be a flaw in the entire series of tweeters with the code 19035 012.01 without the mustaches?
I’m wondering if it’s possible to replace the tweeters in Box 350 with the ones from Box 50. They seem to have the same chemical value of 8.2 mf on the crossover.
Have you encountered a similar issue before or have any insights on how I can address this problem?
Thank you for your help
Filip xxxxxx
Hi Filip
Very strange problem…I exclude that it could be due to the type of tweeter and that the same thing happens to you with 4 tweeters seems unlikely to me. Could also be amplifier cross distortion (due to zero bias current), have you tried with another amplifier?
Regards
Massimo