I think I told you how much I loved the bass from this transmission line design! I don't know that it is the T-L, but one way or another, it is very nice bass!\nYou probably already know this, but there is an easy setup you can use for comparing because your AVR will maintain settings unique to each input!\nYour BDP X700 has two HDMI outputs (#2 is audio only, if it is like my X800).\nSo take 2 HDMI cables and plug HDMI Output #1 into the Marantz BD input and #2 into the DVD input.\nCheck to make sure that with the BD input selected you have retained all of the settings you use with your X13's active.\nThen switch to DVD input and change the settings to just play the Phil3's.\nDouble check it, but you should now have your Phil3 w\/subs on BD and Phil3 w\/o subs on DVD.\nLikely the volume level may require minor adjustment, but otherwise you have a pretty effective A-B switch by selecting which input.\n\nI would consider it a no-brainer that you will prefer the subs for movies\/LFE, but try it to see the differences (although I guess you will lose video when you switch to DVD since the Sony output HDMI #2 is Audio only).\n\nI also expect you will prefer the subs for music with synthesized bass, but again try it to see what differences you detect not only in frequency range, but also in character of the bass (which may influence what frequency you ultimately decide to cross them at).\n\nIn theory, most if not all of the music you used to audition the Phil3's above should be within the Phil3's range. I don't remember Melody Gardot doing anything extra-low, but she does get more experimental in her later albums! So this is one of those classic questions: If your speakers are full range and you do not play them beyond their SPL limits, or play music with unusually low notes, do subwoofers add anything? Of course there are too many factors like the location of your bass sources (subs and speakers) to have a conclusive conclusion, but you can certainly decide for your setup.\n\nI just love that these AVR's have this ability. It is almost like you can have two different systems for two different genres of music if you like. I use this setup to throw in some extra bass (increased sub volume) which I enjoy for HT and to reduce the bass for music.\n\nNo rush, but I am hoping you will play with this in the future and decide if there is any content where you would actually drop the subs or whatever observations you have along the path. I especially appreciate your evaluation, because you are so familiar with the live sounds of the instruments!\n\nOne more observation:\nLooking at the gear in your signature (after you update it) just makes me proud! Not just of myself (though I am),but of Audioholics, and the fact that someone like you can come here and ask questions and end up with such a great system with fantastic sound quality and for a very reasonable price. You could have paid so much more and still not come close to such a good system.\nMuch of the credit goes to you! Not many have the patience and willingness to really pay attention and do the research. So often someone is convinced that they need to get the high dollar amp recently reviewed positively in Absolute Sound. Many would need to get the 7012 instead of the 6012! Or they just want to buy something from their local store and bring it home today! The leap of faith to buy speakers from Dennis is a bit of a stretch - I mean this is just some old-fart retired accountant working out of his house, what the fu¢k would he know about speakers! Many people need to be able to say a brand name (like Bose?:eek:) that their friends will recognize and agree are "the best". You had the intuition (?) to recognize many of the guys here are not just buddies of Dennis trying to push your money his way (as if Dennis is walking away with wads of cash). You took the time to find and listen to Dennis' speakers in your area, and (something many would not be able to do is) you immediately recognized just how exceptionally good they are! So bravo to you for taking your time, being thorough, and understanding what you were getting before you bought it!\n\nI probably should re-frame this, we have had several people who end up with great systems for their situation. You are unique in that you were looking for a top level system right out of the gate - generally someone comes here, gets a good system and optionally upgrades it over time to an upper level system over several years and a couple of iterations. You went straight for "the top"!\n\nBut thank you for helping us (AH) be our best! Like I say, it makes me proud!!!:cool:\nThat was a great little nap I just had!. Whew! :) Much needed after so much stress yesterday, and so much play!\nSo many great points here, Kew! But first, thank you for the kind words.\nThere is so much more to say about the experience I'm having... half of it comes down to just gushing over the men behind it, and half of it is poorly worded "insight." ;)\nGonna start from the top:\nTransmission Lines. Yes. My first and only experience, until now, was the 90 minutes of audition on the Phil 3 back in November. And you almost can't prepare yourself for it... much less the room. It honestly sounds like I have subs on right now, even though I'm in Pure Direct. (Not the X-13s, but like a little cousin of them.) I aim to learn more as I am diving into acoustics and wave theory. So many people have expressed how stunning the LF reproduction , and it is all true. Yet if it can be believed, a proper tapered 1\/4-wave line is supposed to be better still! And this is where I hope to do the first big improvement to my system. I will likely explore a sealed build first, but with a little help from a particular local expert here at AH, and guidance from anywhere I can get it... I am looking at a TL Sub build to truly augment the bottom end of these stunning speakers I have.\n\nI am almost frightened to try, on these, some of the Electronica that Shady has introduced me too. ;) Proper infrasonics...\nAnd this is where my other quest comes in... Proper Bass Management.\nI still have a lot to learn about BM for something like these speakers. The natural LF extension inherent to this design is amazing. To neuter it would be a shame, but so would damaging the drivers! I suspect a good balance will ultimately be struck between some MiniDSP product to control the subs... but there is still the odd point of treating full range towers as LF sources, too.\nI am eager to learn more about Geddes' multiple sub technique and to ultimately run 5 LF sources (including the towers).\n\nLife again beckons... more to come when I can!