I've had two experiences with my newly upgraded 7.1 Home Theater that is making me question either the ability of my speakers or my pre-amp settings. When watching two different blu ray movies on my Oppo BP93 I have heard loud popping (like lightening strikes) come out of my mains and surrounds. It scared the bejesus out of me!
My speakers are all NHT: Mains VT-2's; Center VS-2's; surrounds and back surrounds iC4's. All are vintage from the 1990's except for the iC4's.
The two movies were Thor and Star Trek.
The scenes in Thor were when Thor and company were transported to the Iceplanet, and again when Thor was sent to Earth. during this movie my volume was at -4 and I got the loud popping - like lightening strike sounds from the mains and the surrounds. At this time all of my speaker level settings were at 0, and cross-overs 80 for mains and center, 40 for all four surrounds. I freaked after the pops when Thor was sent to Earth, I was so afraid I blew my mains. Stupid me, this just might have been just too loud at -4. This was the first time watching a movie after having the Oppo, two amps and new pre-pro all connected.
In Star Trek (Circa 2011) it was early in the movie when when the first Enterprise was being destroyed. The volume was set at -18. During this viewing my speaker level settings were: Mains 0 and Center 0, and 1.5 for all surrounds. My mains have 10 inch side-firing subs that go down to 25 hertz, and they were set at -2.5.
My processor is a Marantz AV7005. The speakers are driven by a Wyred4Sound Mini MC-7, 221 watts per channel, class D amp. The mains (nominal impedence 6 ohms) are bi-amped with the W4S, each upper VT-2 and each sub get 221 WPC. The center and surrounds are driven by the W4S at 221 WPC. The rear surrounds driven by a 125 WPC Parasound HCA100A.
One of the reasons I upgraded from a receiver to separates was because NHT told me "You can't really even hear what the VT-2's can do unless you have at least 200 WPC..."
We'll, now I have more than 200 WPC - and they do sound much better, except in these two situations as described above.
I am a novice at this hobby. So I wonder do I have my sub levels too high? Am I playing the system too loud in general. I love my speakers but, do I need more "modern" speakers in order to watch any movie with any LFE's?
I would appreciate thoughts and advice.
ELITE PRO-60X5FD calibrated by AVICAL; Marantz AV7005; WYRED4SOUND MINI MC7; OPPO BP-93; SVS SB13-Ultra Sub;
NHT VT-2 mains; ThreeC center channel; four in-ceiling NHT IC4's.