Many movies have a lot of dynamic range. If you play your dialog back at a reasonable level (say 70dB), the peaks can be very loud (up to 107dB from the LFE channel using the default encoder settings0.
Reduce the dynamic range via compression (this may only work on Dolby Digital tracks) aka "midnight mode" if you don't want the loud peaks.
Or improve intelligibility at lower volumes through speaker choice and placement (placement atop a TV is not a good idea).
Reduce the dynamic range via compression (this may only work on Dolby Digital tracks) aka "midnight mode" if you don't want the loud peaks.
Or improve intelligibility at lower volumes through speaker choice and placement (placement atop a TV is not a good idea).