crossover starting point for seas drivers

stokesman · 19th September 2002, 09:11 AM

hi

just need your expert feedback on some designs for some seas drivers.

i just need a starting point for my crossover to get things working ..then ill try and find some time to get a mic and software. Linearx stuff looks good but is a bit out of my price range.

anyway

have these drivers

seas millenium tweeter T25CF002 low resonance too :-)
seas 6.5 inch magnesium mid w17e002

this mid has massive peaks at about 4.5k...how can these be tamed??

i was thinking about a 2k 24db x/o with impedence compensation

what type of impendence compensation do you also recommend??....parallel (resistor +cap in series with each other)

cheers jonathon

vuki · 19th September 2002, 06:02 PM

4.5kHz peak can be tamed with series LC combination parallel to driver- inductor should be 0.15mH and cap should be 4.7uF. As this combination is pretty effective you could even try 6dB/oct. with inductor at >2mH. Acoustic slope of such xover would be much higer than 6dB. Eventually you could need parallel RLC in series with that inductor to tame probable midrange hump.
I would go with 18dB/oct. with attenuation for the tweeter.
Although not a true recipe, I believe this is usefull.

bstanton010 · 19th September 2002, 06:58 PM

You might want to check out Joe D'Appolito's Thor. It is an MTM with the millinium tweeter, but a different midbass.

http://www.madisound.com/thor.html

19th September 2002, 09:11 AM	#1
stokesman diyAudio Member Join Date: Sep 2002 Location: australia	crossover starting point for seas drivers hi just need your expert feedback on some designs for some seas drivers. i just need a starting point for my crossover to get things working ..then ill try and find some time to get a mic and software. Linearx stuff looks good but is a bit out of my price range. anyway have these drivers seas millenium tweeter T25CF002 low resonance too :-) seas 6.5 inch magnesium mid w17e002 this mid has massive peaks at about 4.5k...how can these be tamed?? i was thinking about a 2k 24db x/o with impedence compensation what type of impendence compensation do you also recommend??....parallel (resistor +cap in series with each other) cheers jonathon

19th September 2002, 06:58 PM	#3
bstanton010 diyAudio Member Join Date: Sep 2002 Location: Arizona	A tweeter filter You might want to check out Joe D'Appolito's Thor. It is an MTM with the millinium tweeter, but a different midbass. http://www.madisound.com/thor.html

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19th September 2002, 06:02 PM	#2
vuki diyAudio Member Join Date: Jun 2002 Location: zagreb, croatia	4.5kHz peak can be tamed with series LC combination parallel to driver- inductor should be 0.15mH and cap should be 4.7uF. As this combination is pretty effective you could even try 6dB/oct. with inductor at >2mH. Acoustic slope of such xover would be much higer than 6dB. Eventually you could need parallel RLC in series with that inductor to tame probable midrange hump. I would go with 18dB/oct. with attenuation for the tweeter. Although not a true recipe, I believe this is usefull.