Wayne Parham Messages: 18787 Registered: January 2001
Illuminati (33rd Degree)
Those adapters adversely affect performance because they interrupt the flare profile. Using them is a sort of band-aid fix, only recommended as a last resort when sound quality is not important.
It's really best to use a screw-on type driver with a screw-on type horn. Don't use the adapter if you can help it.