I own an Acoustic Reasearch ARS112 subwoofer. I know it's an entry level sub at best, my question has to do with the sensitivity of subwoofers recognizing an LFE signal. It's the only sub I've ever owned and I've had reservations with it from day one. It makes a very noticeable pop when switching off during quiet moments in movies and music. I love listening to multichannel music and sacd's in particular with my Yamaha DVD-S1700. Here's the problem: I have to turn the output of my Yamaha RX-V530 (in 6-channel mode) up quite loud before the sub will kick on, yet during even minimally quiet moments during Pink Floyd's Wish You Were Here, it pops off if the volume isn't left at a fairly loud level. Is the normal for most subs? Thank again for any help and any recommendations would be great. I hope to purchase either Definitive Technologies Pro Sub 1000 or Supercube 2000 to go with my Pro Cinema 100's.