please update this post with any results you may find. i also experienced some 'popping' from the VP150 woofers a few days ago when listening to some heavy guitar music turned up very loud. i got very concerned, and almost upset that the speaker seemed to be struggling under the load, but later realized that i had the receiver set to the neo6 mode, which directs more of the sound source to the center channel. once i realized that, it made since that the poor 150 was 'cracking' under the pressure. i have since run similar high volumes with the receiver set to 'all channel' and did not have any probs from the 150.
bigjohn
