I have an SVS 25-31PC and was listening to some heavy bass music one day when my brother approached me with a CD in hand. he said his binarual copy of a classical recording included an amazingly low organ section. i popped it into my new Marantz CC-4000 and had a go. with the volume set to 70 on my Onkyo 595, i had a listen to track #17. Wow. i say this 'wow' without stress towards positive or negative for 2 reasons. first, the bass was loud, made my sister's bathroom rattle, and was (IMO then) good sounding. he told me to put on my Sennheiser HD-580s and have a listen again. here comes the second part of the 'wow': the Senns put the SVS to shame. after hearing the organ's low, clean output through headphones, i almost cannot listen to the loud boominess of the SVS attempting to play the recording back. i'd like to see if some of you people with Ultras (that can go lower and sound better than my 25-31PC) can hear a clean, smooth-sounding low G. i also have not calibrated anything and have crappy speakers that crack when i turn it up, so this may be part of the problem. but it actually sounds like an organ thru the 580s. since this is a hard-to-find CD (my bro picked it up in Germany), i'm making a 48 sec clip available (in uncompressed .wav format) for people to demo. here's a link to the 8 MB clip of the recording. the recording is of C. Saint-Saens' Symphony #3 in C Minor, opus 78. i don't listen to much classical, but this is amazing. he has perfect pitch, so for reference he says the note that's held from 11-15 sec is a C-1 (32.7hz), from 21-25 sec is a G-0 (24.5hz), and from 31-35 sec is an E-1 (41.2hz). the E-1 is the most room-shaking on my SVS, though the C-1 comes out loud and clear also. the G-0 is not really recognizable as a note thru the sub like it is thru the headphones. thanks to all who give honest opinions! if any of you want to hear a different section of the piece, or want a compressed .mp3 version, please don't hesitate to email me! i can only store 15 MB on my other geocities account, so if someone can offer to host a few clips, i'd really appreciate it, as i really want your input here. thanks! ------------------ -Thomas Click here to visit my webpage.