I'm looking to pair a Dayton Audio AMT Mini-8 tweeter on top of the 4" Dayton Audio RS100 for super-tweeter duties. This is my first go with an AMT, so I'm trying to figure out the minimum XO point. I know with 'regular' tweeters, it's a general rule of thumb to cross the tweeter over no lower than 2x the Fs. Do AMT's have the same 2x Fs 'standard' or no?
AMTs really don't have much if any Fs magnitude. They are like planars and ribbons in that regard. FWIW, I know of a design where it was xoverd as low as 5k, but that was with 3rd order electrical. More typically, I see these with a xover in the 8k+ region.
Later,
Wolf
Later,
Wolf
I kinda want to cross it over around 7-8k anyways just because the mid can go high enough and I wouldn't want to risk burning out my tweeter prematurely. Supposedly AMT's shine at the higher registers anyways, but again, I don't have any personal experience with them.
Do I need to take into account driver spacing with that setup? Previously, I'd heard that 13,550/<crossover_frequency> = the maximum distance (in inches) between the driver centers to avoid nulls. I'm not sure if that was specific to a certain speaker design or if that's a general rule. Just thinking about it in my head, it sounds like it would be a general rule, but also more prevalent in certain configurations like an MTM. If that is indeed a 'rule', 7kHz put the center-to-center spacing between the tweeter and mid at only 1.9".
Do I need to take into account driver spacing with that setup? Previously, I'd heard that 13,550/<crossover_frequency> = the maximum distance (in inches) between the driver centers to avoid nulls. I'm not sure if that was specific to a certain speaker design or if that's a general rule. Just thinking about it in my head, it sounds like it would be a general rule, but also more prevalent in certain configurations like an MTM. If that is indeed a 'rule', 7kHz put the center-to-center spacing between the tweeter and mid at only 1.9".
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