Check the link below. I use this type in a high pass application to keep my main speakers from seeing anything below 100Hz. I don't suffer anything by using them. They came at the recommendation of the speaker manufacturer.
http://www.partsexpress.com/webpage.cfm?WebPage_ID=3
Good luck.
http://www.partsexpress.com/webpage.cfm?WebPage_ID=3
Good luck.