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In Reply to: RE: Modding Tympani IV- basses? posted by AkuAnkka on November 29, 2014 at 10:20:02
That is the tweeter that needs a certain distance from the sidewalls. The bass panels benefit from wall loading and the tweeters and mid can stay the optimal distance from the sidewalls - or in the case of the Tympani when setup inline a bit too far from the sidewalls. I found something short of 3' to be the optimal distance.
The two drivers of the bass panel allow you to aim them at the listening position along with the mid and tweeter in an equidistant arc, which allows time alignment and incredibly precise imaging with 1st order XO Or combined 1st order (mids) and 3rd order.
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But hey, if we get back to the original issue; has anyone got any (positive/negative) results for modding IV- basses somehow? Such as stiffer frames, more rigid feet, Razor modification etc.?
Razor-modification will not stop the movement of the perforated sheet metal, if that is what you want. You can increase the number of cross-members but I am not sure it is necessary. As far as I can see, the clamping positions (the "buttons") are close to the excisting cross-members. The perforated seems to move most at the buttons.
Satie is in favour of stabilizing them. You can also add weight to them. I would like to suggest some thin damping strips between the driver and the frame. Get rid if the staples.
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