Originally Posted by Ed Mullen
Here are some things to check in your system:Subwoofer:
Voltage input toggle switch set to Normal (already done).
Gain set to 0 dB (already done).
Low pass filter disabled.
Room gain comp disabled.
PEQ 1/2 disabled.
Phase set to 0 degrees.AVR/BD player:
All speaker channels bass-managed (i.e., not set to full-band/full-range) with a speaker/sub crossover appropriate for their respective bass extension and dynamic output capabilities.
BD player is connected to AVR via HDMI and bitstreaming audio codecs and the AVR is seeing/decoding DD TrueHD and DTS Master Audio.
Dynamic range compression circuits disabled (these options can vary depending on what audio codecs are being played).
Dynamic Volume set to the least restrictive setting and/or disabled.
2-channel source material often has a separate menu for digital bass management - make sure the subwoofer is seeing a signal on 2-channel and that the mains are not set to full-band/full-range (often the default for 2-ch Direct).
If the subwoofer is properly level-matched, it will not 'blow-out the room' on most 2-channel source material (which simply doesn't contain huge amounts of deep bass). A possible exception might be hip/hop, dub-step, rap, trance music which could deliberately be over-cooked with sythesized deep bass. But in general an accurate subwoofer will not constantly make its presence obviously known (e.g., boomy, tubby, one-note-ish) on music. Some enthusiasts automatically expect an Ultra to sound like a pro-sound stage set-up (i.e., tons of mid-bass slam and over-emphasis in the 45-70 Hz band), and that simply isn't what accurate bass sounds like on music. A properly set-up, integrated, and accurate subwoofer should sound like an extension of the mains on music, and not like an independent source of obvious bass.
On action/sci-fi Blu-ray DVDs an Ultra will certainly pressurize the room with high SPLs and hit hard when the source material calls for it. Otherwise it should seamlessly blend and support the soundtrack and not call attention to itself. Migrating from a lesser sub (which likely has a non-linear FR with mid-bass emphasis) to an Ultra often requires a period of adjustment to the more accurate bass presentation.
If after addressing the above you still feel the Ultra is obviously under-performing, contact Sonic-Boom and/or SVS-USA for further assistance. Thanks.