Originally Posted by promtber
Great info . I do like the PC 4000 just so expensive. It’s doable. Is dual PC2000 better than single PC4000? Maybe I can buy one and maybe later get another. But I do like the look of single to make a happy wife.
Originally Posted by joms
I have the pc13 ultra which is much like the pc4000 so if i want more then i should add another one. The problem is theres no more space for a pb or pc but i might fit an sb2000 or sb3000. Would you recommend this if i can only put it in 1 location 2meters away from my pc13 ultra? I have a denon x4500 with audyssey xt32 and 2 sub outs.
I will try to answer both quoted questions in one post. With respect to the first question, dual PC2000's will come close to a single PC4000 at some frequencies, but if you try that and still want more, you will still need to move to dual PC4000's to get it. And, dual PC2000's will never be as strong below 20Hz as a single PC4000. Personally, I would just start with a PC4000, if I were you, and could afford to do so.
With respect to the question in the second post, I would not recommend mixing ported subs and sealed subs. Together they might actually sound worse than the single PC13 does now. And, it might sound much worse if the two subs start cancelling each other at about 30Hz or so. You could actually lose some of your deeper bass, and XT-32 with SubEQ won't be able to help you integrate two subs with very different frequency responses.
All the two sub outs do is allow Audyssey to set distance (timing) and levels separately for two subs. That part is helpful, but the two different subs are still EQed based on their combined frequency response. If the subs don't match to begin with, and can't help each other by filling-in dips at some frequencies and pulling down peaks at others (which is what we would like for dual subs to do) then Audyssey can't really do much about that.
The bottom line is that you need for your subs to match, especially ported with ported, and ideally with the same port tune as well. Even then, getting two subs to play well together isn't automatically easy, because the room itself is still messing with your frequency response, depending on the specific subwoofer positions you choose.
(If you stack two identical subs, or place them side-by-side, you take room influences completely out of the equation, and you have 6db more at every frequency, but no improvement in frequency response. The two subs just act as a single larger sub.)
I would start by making sure that are you getting the most you can from your current PC13, including turning-up the volume more if necessary, and then look harder for a second PC or PB13 position (including some slight furniture rearrangement) if obtaining even more bass than that is really important to you.
Section II of the Guide, linked below, may help if you want to understand a little more about implementing subwoofer volume increases. (Hint: you can get just a little more undistorted SPL from the PC13 if you use the sub's own gain control to increase your subwoofer volume. That idea doesn't apply as much to the newer models.)
I hope that helps, guys because I'm tapped-out.