Hi,
I want to use Mark Audio CHN-110 in a dipole in a 12 inch wide baffle. The driver has a high xmax (for its size) of 8mm one way. How low can I cross this driver to a helper woofer with a 2nd order filter? Is 250hz reasonable?
Have a good day.
Warm Regards,
WA
I want to use Mark Audio CHN-110 in a dipole in a 12 inch wide baffle. The driver has a high xmax (for its size) of 8mm one way. How low can I cross this driver to a helper woofer with a 2nd order filter? Is 250hz reasonable?
Have a good day.
Warm Regards,
WA
I think M.A. specify their 'Xmax' as the absolute max before damage, not a comfort zone. The comfort zone for lowest distortion is probably around +/-1mm, so 250Hz seems reasonable, but it would depend on baffle size and how loud you want to play them.
I don't know where 1mm comes from, since it would need to be an underhung motor or very short coil / coil gap for there to be any chance of an Xmax figure being that low.
MA use Xmech as a synonym for Xmax -I've tried to get them to change that for years, but I'm only a consultant, so my views are a take / leave situation. The drivers are usually limited, so there shouldn't be any physical damage, but obviously you don't want to be cranking them to those extremes. Unfortunately there's no single definition for what Xmax actually is, so no standardised method to derive a figure for it; in the absense of anything else, I'd suggest assuming 5.7mm as far as HD is concerned, although there's a chance FMD will come into play with that, so I'd avoid regularly driving it that hard. Providing the crossover is done well 250Hz should be reasonable enough; if you really want to minimise travel, as some of the pioneers pointed out, 500Hz is a good point to aim for as the majority of energy put out by, say, a symphony orchestra is < that frequency.
MA use Xmech as a synonym for Xmax -I've tried to get them to change that for years, but I'm only a consultant, so my views are a take / leave situation. The drivers are usually limited, so there shouldn't be any physical damage, but obviously you don't want to be cranking them to those extremes. Unfortunately there's no single definition for what Xmax actually is, so no standardised method to derive a figure for it; in the absense of anything else, I'd suggest assuming 5.7mm as far as HD is concerned, although there's a chance FMD will come into play with that, so I'd avoid regularly driving it that hard. Providing the crossover is done well 250Hz should be reasonable enough; if you really want to minimise travel, as some of the pioneers pointed out, 500Hz is a good point to aim for as the majority of energy put out by, say, a symphony orchestra is < that frequency.
