Geoffkait, I finally checked and have only two types-those for speakers and for cablees. I thought that I would experiment with the cables ones this weekend. I know the speaker ones harm the sound of the BMC Arcadias. I need to get some for the fuses.
Speaking of tweaks, I had a friend with a door behind her speakers. I gave her on Acoustic Revive QR-8 to put in the middle of the door. It did wonders and she wanted more. Acoustic Revive doesn't even have them in their product line anymore? I guess tweaks come and go. I must say that the HFC cables have caused me to remove many of my tweaks.