15" vs 18" subwoofer - which to buy?

Good day folks; I also am running two Bag End Infrasubs using my Plinius M8 preamps dual rca outs at line level. My system goals were to augment a full range speaker with a seemless blending full range fast, tight response along with left to right drum kit recreation.I also use Plinius SA102s in xlr dual mono with Mirage OM6s with a claimed response of 18 htz +-3db, Im running lots of power across my front two channels and with a Plinius P8 on my center channel another 400 watts through the use of my transparent ultras and splitter.Now while some may claim overkill Ive found all this power is not corrupting anything in my listening,actually quite the opposite as my significant other listened for nearly four hours one evening when we played Fleetwood Macs "The Dance" among others and Mics use of the kickdrum was recreated through my Bagends wonderfully with my Mirages midrange reponse and lower dual eightinchers recreating the drum kit, the Bagends are so seemless that the only time you know there on is if you unplug them, then instantly ambient spatial cues just disapeer and the stage becomes noticably more less real, somehow they impart a realism to the recorded event that allow one to "see" into the recording.Also a great reproducer of pipe recordings as listening to Saint Saens Boston Symphony on Living Stereo SACDs the shudder of the organs albeit very subtle again imparts that reality to recordings that get lost with just about any single full range speaker. I also have a Mirage BPS400 for huge .1 effects and yes all subs working in 5.1 dolby and dialed in low prefering to use my ear although I have measuring devices that assist I prefer my own ears when dialing in system. So most of my need for my Bagends were simply to augment my Mirages full range response and help provide more subtle spatial cues; that surpisingly found when adding my second sub.Its my belief that theyre are many great and badly designed products out theyre and this is one of the best for musicality purposes, hence the BPS400 is likewise in the effects camp, choose wisely and enjoy. Regards Tim W.

Greetings Dgw;

Your sure to stir up some heated debate in your assessment of the Bag Ends comparative performance, yet Ill consider your remarks valid based on your previous equipment, all high quality stuff, money not being the issue.

I must also confess not to care to be misleading in my comments about products to other posters looking in however, that being said, I concur that the Infra 18 is a sealed {not tuned} enclosure that is both time and phase coherent that delivers bass information that's very controlled, detailed with excellent timing and pitch, just does its job and gets out of the way of the important mid range while disappearing into the stage when no low bass information is there, totally integrated into my system yet never, ever, letting you know its position --geographically speaking.

This really is a reference product that should be on anyone's short list for those seeking a low bass frequency specialist sub that has seamless integration, effortless speed, extremely low frequency output, ie. thinking about how realistic the huge pipe organ music with sustained continuous low frequency shuddering/energy is utterly and effortlessly reproduced not to mention stand up acoustic bass like that from the Ray Brown trio or Michael Arnopold from Patricia Barbers catalogue etc.. that's done seemingly with nadda missing, not a note!

Just wanted to add in that last little comment about the sense of spaciousness this sub imparts to better recordings, its almost the same sort of dimensionality tube seekers enjoy in their playback, my thoughts as to whats causing this is perhaps this sub picks up reverberation trails or echoes in studios and venues that most other subs seem to miss, thus contributing one more subtle spatial cue that will greatly enhance the visual glimpse into recorded performances-- most surprising in addition to the terrific bass . " other writers have also commented on this effect in professional reviews"

In my unbiased opinion - YES - one of the very best.

Regards /// Tim W...