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View Full Version : active/passive x-overs?



Wingsfreak9
07-23-2010, 10:38 AM
what is the difference between active and passive crossovers?

ramos
07-23-2010, 10:46 AM
Biggest difference is flexability mainly

active crossovers can be adjusted ( slope , xover point, yada yada) electronically with either turning a pot, switch, or through software. Passive crossovers, once built, can't be adjusted other than maybe tweeter attenuation without rebuilding it ( changing caps, resistors, coils....) . :)

AllenH427
07-23-2010, 10:55 AM
Passive crossovers are what come in a typical component set. The crossover point for the woofer to tweeter is set, and you can't adjust. The amp/headunit goes through the passive crossover and then into the speakers.
Active, like stated above, gives you a lot more flexibility. You would have you have a headunit that is active capable, to adjust that crossover frequency on your own, or you could use multiple amps/channels, running one channel to the tweeter, and another channel to the woofer.

smgreen20
07-23-2010, 11:45 AM
Or you can buy a 3-way active crossover. It's not just in the HU's.

Passive is where the amplified signal (after the amp) PASSES through the xover,
Active is where the low level (RCA) signal is ACTIVELY crossed over by an electrical unit.

Passive xovers are of the devil when SQ is considered. It's a very disputed topic, But I stand that passives ****. This is from Scott Buwalda himself
"Passive crossovers are of the devil. :)

Seriously though, there is no good, defensible reason to use passive crossovers. Insertion losses, odd-order phase shift, damping factor dropping to zero on amplifiers, no flexibility, and the list goes on.

Passive crossovers will (hopefully) someday be the cassette tape of this industry. Only the really old school guys continuing to dabble with them..."

Thread: Buwalda Hybrids International Bulletin Board • View topic - Why do some companies strongly suggest Passive crossovers?? (http://www.buwaldahybrids.com/phpBB3/viewtopic.php?f=6&t=5364)

Peter_Klim
07-23-2010, 11:17 PM
what is the difference between active and passive crossovers?

Jesus F*in Chr*ST!! Look at the F*in sticky above!

Wingsfreak9
07-24-2010, 12:19 PM
Jesus F*in Chr*ST!! Look at the F*in sticky above!

relax moron i didnt see it...thanks to the people who actually know what they are talking about though

RAM_Designs
07-24-2010, 12:22 PM
active = before amplification
passive = after amplification

Peter_Klim
07-24-2010, 01:48 PM
relax moron i didnt see it...thanks to the people who actually know what they are talking about though

No need for name calling.

You learned from your mistake. Next time you can do a search if you don't see a sticky.