PDA

View Full Version : xxx mid and power question



wow
04-24-2005, 09:16 AM
i am thinking of buying a pair of xxx6.5 mids and would like to run them off of a van gogh 500.4. that would be giving each one 250 watts @ 2 ohm. i will be running them ib with sound deadened doors ---all holes sealed----active-----and was wondering if that is just too much power for them. i do listen to my music loud and would have my gains set accordingly with my headunit but i dont want to have to worry about cranking it and the speakers blowing. (being that rms is 150 watts). any input would be appreciated.

thanks

cjj2d
04-24-2005, 09:43 AM
I am sure they can handle that power just fine, but like you said watch the gains and volume don't get carried away and they should be fine.

cappy72
04-24-2005, 11:06 AM
I would also consider setting the high pass xover to about 85

squeak9798
04-24-2005, 11:57 AM
I would seriously be careful with that much power. You're pretty close to double their RMS rating.........use a VERY conservative gain setting.

cjj2d
04-24-2005, 12:29 PM
the guy I talked to at RE told me to cross them down at 60ish and they would play great from there on up. that was in a IB setup though.

cappy72
04-24-2005, 01:35 PM
yea and that was also with 150 rms... you are going to have problems with the extra power, so if you cross them higher you will be able to handle more power... but like sqeak said you need to be careful with the gain

wow
04-25-2005, 01:50 AM
thanks for the input guys...yeah i think im going to go another way. that is too much power for a 150 watt rms speaker. again thanks for the input.

cappy72
04-25-2005, 12:23 PM
its not that it is too much power for the xxx6.5's its that you need to make sure you dont over excurt the voice coil... thermally the voice coil needs less power than what it give, so if you raise the crossover setting you can throw more power at the coil without being overally concerned with it bottoming out...

I dont think that i explained it right so in general I think the xxx6.5's can handle a 250 load with the right crossover setting...

squeak9798
04-25-2005, 12:28 PM
Thermal power handling is thermal power handling, regardless of crossover frequency. If 250w is too much power (heat wise) for the coil, it's going burn up......regardless of where the crossover is set ;)

Raven
04-26-2005, 12:24 AM
Movement = heat. Excursion = movement. Lower frequencies = more excursion.

I'd say putting some kind of back pressure (hint: enclosure) would greatly increase the power handling of those little suckers.

squeak9798
04-26-2005, 10:36 AM
Movement = heat. Excursion = movement. Lower frequencies = more excursion.

The excursion would have a cooling effect on the VC (more air passing by the coil). So, more excursion would actually be better, not worse ;)

But, regardless.....you aren't going to double a voice coils thermal capacity unless you pack it in ice before you play it.



I'd say putting some kind of back pressure (hint: enclosure) would greatly increase the power handling of those little suckers.

Yeah, the mechanical power handling.......not much thermal benefit, or atleast not enough to double it.