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In Reply to: RE: First venture into SETs. posted by drlowmu on July 06, 2016 at 08:48:28
Apologies for not being clear. It's external vibration (strong bass frequency energy) that seems to be a bit problematic, which isn't the amp's fault at all. It's just a matter of my finding out how to address the issue, although I don't doubt mass loading would effect some improvement.
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Mass loading helps and it's easy to try with anything dense and heavy. For feet, I've had good results with Herbies Tender Feet. They are equal to if not better than sorbathane and they will not loose their shape. I had a tricky preamp that was highly microphonics and those feet with a little mass in the right place took care of most of it.
Thanks for the tip.
Part of the problem was that the sub levels were much too high. I'm running the mains full range, and set the subs to roll off early so they just fill in the extreme low frequencies. Most music doesn't go down that low, so it's a little hard to get it right, but an afternoon with an SPL meter and the setup CD helped considerably.
That is probably more of a room/speaker placement issue than an amp issue in this case. Someone else, who is more knowledgeable than i am, can comment on this.
I'm slowly getting it dialed in, but it does take time and experimentation. I see some cable changes in my future soon as well. With the external crossovers on the Odeons and the amps being right next to them, I can virtually eliminate speaker cables, and just use a short set of jumpers.
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