Originally Posted by dmusoke
Neutro ...I beg to differ a bit regarding the SB13 low end content ability. Yes, one SB13 will be outclassed by a PB13 any day. But in my case, as I have dual SB13U's which has level and phase/time-aligned by SVS's sadly discontinued AS-EQ1, I get plenty of sub-20Hz output that rattle things off the walls (and its not loud bass) and my couch which I'm sitting on. The latter I find very amusing and pleasantly puzzling at the same time. My room is 2500 ft^2 .
Indeed, dual SB13's can add up to +6 dB compared with a single one. But typically unless you stack them, you'll get about +4 dB. That brings the dual setup closer to the PB13 at and under 20 Hz but the ported sub will still have the advantage. Of course above 40 Hz the dual SB13 will run circles* around the PB13
* Not actual circles. The SB13s barely move by themselves.
Originally Posted by fatbottom
actually I'm pretty sure the SB go lower, do they not? if PB13 is ported to 20hz, frequency drops like a stone below port tune, but SB does not. Only if you plug the port to 16hz or so.
Originally Posted by cableguy301
Hi Neutro.. im pretty sure the sb13 go deeper and louder at depth than the pb13u.. especially if you add in the room gain...
Indeed I assumed the 16 Hz tuning. In 16 Hz tuning, according to Data-Bass
and assuming that the data for the PB13 in sealed mode is close enough to the SB13, the PB13 has a 13.6 dB advantage over a single SB13 at 16 Hz. Even taking room gain into account (which would act on both types of sub anyway), and stacking the dual SB13 to get +6 dB, there is still a 7.6 dB advantage to the single PB13 in the ULF range. The port is that powerful.
Sure if you're talking about, say, 10 Hz, the SB13 might have a slight advantage and have a cleaner output (if you're able to tell if a 10 Hz rumble is clean or not), but a single SB13 will only be able to push 80 dB or so at 10 Hz. It will thus be drowned out when playing 90+ dB content at 20 Hz and above.
pair of these be pushing 100 dbs at 10 hz ez..
You'd have to have an amazing room gain to hit 100 dB at 10 Hz with any SVS sub!
That being said, the dual SB13 will provide smoother and more uniform bass, and will easily outclass the single PB13 for music (typically 30 Hz and above). The PB13 will provide more tactile feelings and more powerful rumbles with sub-30 Hz LFE in movies.