Originally Posted by tigerhonaker
Currently I have four (4) Mirage BPS-400 subs.
See Specs below,
They don't lack for bass content but I have had those for 20-years.
My dedicated (Pitch-Black) H/T is approximately 4,00 plus Cubic-Feet.
I really think, hopefully, from all I have seen (Videos) and read (Magazine-Reviews & Customer-Comments) that four (4) of the PB-3000 subs will greatly enhance my overall listening pleasure versus the current 4-Mirage BPS-400s.
I do Plus 90% Movies and from what I have seen & read the SVS PB-3000 excel with those !!!
So, do any of you run four (3) of the SVS PB-3000 Subs
As I read through the comments I didn't really see all that many that run Dual-PB-3000 Subs ???
I would really-really like seeing further comments from owners on the SVS PB-3000 Subs.
Especially Dual or quad applications guys ..........
Welcome to the thread! As you know, I have seen your posts on a couple of threads now, and I am curious how you settled on having four PB3000's? I know that you currently have four subs, so I understand your desire to repeat that. But, I'm also curious about what you are really looking for with your new subwoofers?
Are you looking for more mid-bass chest punch, or for more low-bass excitement and special effects? They aren't mutually exclusive, but it would be helpful to know what your priorities are. It would also be helpful to know your typical listening volume.
I looked at your theater photos (nice theater and equipment) and I assume that it is in fact a little more than 4,000^3.
The reason that I am asking these questions is because I can't help thinking that you might be happier starting with two PB4000's, rather than four PB3000's. The PB4000 has a lower tuning point than the PB3000 (16Hz as opposed to about 20Hz). Surprisingly, the PB3000's are even stronger in the mid-bass than the PB4000's are, but the PB4000's are much
stronger below 20Hz.
In a small room, where there is a lot of room gain, that won't matter as much, but in a 4000^3 room it might. You can make-up some of the <20Hz disparity in performance by having enough of the PB3000's, but it will be hard to equal two PB4000's below 20Hz. For instance, it would take all four PB3000's to equal just one PB4000 at 16Hz. And, most people in that size room would want dual PB4000's, which would add another +6dB at that frequency.
(Just to make this point even more emphatically, it would take eight PB3000's to equal dual PB4000's at 16Hz. Each doubling of subwoofers nets +6dB of SPL, averaged across the subwoofers' passband. Typically, the full +6dB is achieved for the very low frequencies.)
If you are primarily after more mid-bass SPL, then four PB3000's will be a terrific choice! In fact, they will run you completely out of the room where mid-bass frequencies are concerned. But, if you are also interested in very low-frequency effects, as most people who are 90% movies are, then dual PB4000's might be a better bet.
My advice with respect to ported subs is to pick your desired port tune, and then to add multiples of that; rather than just trying to use numbers of subs to compensate for a higher port tune than you really should have started with. Lower port tunes are a big help in larger rooms, where there is less room gain to amplify the lowest frequencies. And, on concrete floors, lower-tuned subs also have a tactile ULF advantage.
You know, nothing says that you couldn't also add two more PB4000's somewhere down the road if you wanted to. As long as you are strategic, and perhaps a little bit patient, if cost is a factor right now, it really is possible to have your cake and eat it too.