Originally Posted by GLBright
After discontinuing the Q-pole Infinity went with this design through several different models. It's a mono/di/bi-pole design and probably superior to the RS model mentioned.
I used to own the entire Infinity Prelude PFR system, and the Quadrapole surrounds are the only thing left from that old system.
The foam on the old Prelude PFR's degraded, and so I took them to a well known and respected speaker repair shop here in Tampa that literally Butchered them.
The small midrange drivers of the Prelude PFR's had a narrow foam surround, from the factory. When I got them back, the replacement foam covered 1/2 of the cone of the drivers
To say they sounded like Crap is an understatement.
Over the years, I have had many surround speakers come through here of every configuration. Dipoles suck IMHO, Unless you happen to be sitting right where they have the well known dipole null.
LOL, I even tried Klipsch surrounds, with the 2 horns firing at 45 degrees to each other, with a cone in the middle. They sucked too, because you could easily locate the cone driver
I like the Quadrapole because they are small, efficient, and play loudly w/o being localized.
They are "good enough" for my use, but remember I am much more of a music listener then I am a home theater guy.