I just got done spending no less than 7 hours tweaking my two new PC13 Ultras in a 10x14ft foot room. Mode, settings, placement, and a perfect Audyssey XT32 calibration makes the difference between these subs being very lacking or absolutely breathtaking. I messed with the modes for good two hours, and ended up going sealed mode due to the massive amount of headroom I have. I can't remember Audyssey XT32 ever making such a big difference after calibration either, it's night and day difference. I spent another 2 good hours finding the perfect mic positions for my room that produced the best results.
For anyone wondering... I was previously running a single 20-39 PCI, and upgraded to a single PC13 Ultra. I was not happy with the single PC13 Ultra performance, due to my room acoustics, so I connected up my old 20-39 PCI to test dual subs. It makes a huge difference, I would say its a larger difference in my room than going from no sub to 1 sub. Ultimately, I decided I wanted my subs to match so I bought another PC13 Ultra. Even in this room there is a very noticeable difference between running the Ultra and 20-39 versus 2 Ultras. These subs are incredible.
~$3000 in subs, about a years worth of saving on my income. NO REGRETS! I cannot recommend dual subs enough if your receiver supports EQing them seperately (was not impressed when I ran them in stereo mode). The bass fills the room more evenly, and there's no comparison. The only con I can think of is now all my future receiver upgrades will need to support: 9.2, Audyssey XT32, and 4K.
Originally Posted by jsampsell
I was mistaken. I meant to say that it was set to LFE only and not LFE+Main. I also just checked what Ed said about the crossover frequency being under the advanced/individual crossover menu and found that, in fact, it does allow me to take the crossover down to 40hz if I wanted to. Which, to that point, my line of thought was, since my 8060s have good subs in them and can plan low, why not let them handle down to 40hz and let the PB13 handle everything else. Is that a good idea? I'm going to try that out and see if it makes a difference.
I agree about Audyssey and have thought about doing it manually. I have an SPL meter. Albeit, not a very nice one as it is from Radio Shack and only cost me $50 but it should do the trick, right? I'll look into the REW software that you mentioned. My only problem with that is going to be the fan noise from my HTPC. I usually turn off the machine when I want to watch a good movie. It isn't stupidly loud but I'm afraid that it would have a negative effect on my readings. I could try it on my laptop, though. Hmmm...you've got me thinking. Thanks!
Thank you. As I said above, I was able to find that I can, in fact, set the crossover settings to as low as 40hz. I guess I never checked there before. Oh well. Right when you thought you knew your system fairly well, someone goes and schools you on something new.
That's what this forum is for though, right?
I also stated above that I was mistaken in my original post. I had it set to LFE only and not LFE+Main. I'm fairly certain that I read somewhere on this board that the LFE+Main was kind of useless. (Not really useless, per se, just not necessary.) I did, however, find that my LPF for LFE was set at 80hz. I set it to 120hz as you suggested. I'm anxious to see if this all makes a difference.
Thank you both for the help!
As long as Audyssey sets your speakers to 80Hz or below I would always recommend the following:
LFE = 120hz
Bass mode = LFE (Not LFE + Mains or whatever it's called on your receiver)
Speaker Size = Everything Small (even on the most expensive speakers out there)
Crossover = 80hz on all speakers
This is the "standard". Everything outside of this comes down to preference, but the lower you set the crossover, the more power required to power your speakers. I'd never drop below 80hz on any speakers unless you have an external amp, and even then i'd personally still do 80hz. The sub is going to handle those low frequencies better than pretty much any speaker out there unless your using a low end sub with high end speakers. You have a PB13, I don't know of any speaker that would produce bass under 80hz better. Let the sub do it's job! Edited by Tyrindor - 10/9/13 at 3:13pm