"Actively Bi-amp" Yuk! plus Staring at them gold drivers isn't my cup. Horns? no thanks.
Hey, Mike, those Monitor Audio Silver S500:
- 1" Aluminum/Magnesium Metal Tweeter
- 4" Aluminum/Magnesium Metal Midrange
- Dual 8" Aluminum/Magnesium Metal Woofers
The S300:
- 1" Aluminum/Magnesium Metal Tweeter
- 4" Aluminum/Magnesium Metal Midrange
- Dual 6" Aluminum/Magnesium Metal Woofers
So looks like all-metal drivers, not plastic or paper cone drivers.
In comparison to the Aluminum/Magnesium metal drivers of the Monitor Audio and Titanium + Aluminum metal drivers of the Klipsch, the Polk have the Polypropylene (Plastic material) drivers.