The Pioneer B20 fullrange driver, also known as the BOFU, sounds good stock. Removing the dustcap improves the sound. It's something you can easily do with an Xacto knife and some patience. Removing the dustcap improves the sound by reducing the muffled vocals and pushing the overall presentation forward. The sound is slightly brighter and less dull. Visit www.ZillaAudio.com to find out more about modifying the B20 fullrange driver.

You can purchase phase plugs at www.planet10-hifi.com.

Super Tweeter kit at www.ZillaAudio.com

The ZillaTweeter super tweeter kit found another home atop a Klipsch Cornwall. Adding sparkle and air to the top octaves of just about any speaker is the goal of a super tweeter. This super tweeter comes with three different capacitors to alter the crossover frequency to your preference plus the volume control allows you to further fine tune and blend the ZillaTweeter into your existing speakers. Find out how you can add dynamic, detailed treble to your audio system. Visit www.ZillaAudio.com to learn more about the ZillaTweeter super tweeter.