Oh, so the size dictates how loud the subwoofer can play? I thought that it was only related to the speaker element(s) and the amplifier :duh:3) Max SPL is a bit higher for the PB13 than for the PC13. Maybe because it weights more ???
because the box has more volume than the cylinder
The ports only function at very deep frequencies (starting below about 28 Hz). The wavelengths at these frequencies are quite long and tend to acoustically load the room similarly regardless of the port orientation differences between the PB13U and the PCU.I'm just curious as the PB's ports shoot out at ankle level and the PC shoots straight up. Would that make a difference in the sound at all? To me, I'd think that the ports shooting straight out would be better heard and felt then having the ports shoot straight up.
Sorry for the old thread bump. However, based on those graphs, doesn't the PB13-Ultra have about twice the output of the PC13-Ultra at 10Hz in 15Hz mode?From my understanding the sound between the two subs is nearly identical. Their frequency responses will be useful in telling the differences.
Taken from SVS
As you can see they look nearly identical, but I would say the PB is slightly more linear in the important regions, but again if this is audible is another question.
FR and max output capability are not the same. The PB13-Ultra does have a few Hz more extension in each tune compared to the PC13-Ultra, primarily due to its larger enclosure volume and slightly deeper tune points. But the max output capability of each subwoofer at any given frequency is pretty close, although the box does hold an edge.Sorry for the old thread bump. However, based on those graphs, doesn't the PB13-Ultra have about twice the output of the PC13-Ultra at 10Hz in 15Hz mode?
Yes, when the drive levels are matched, the PB13-Ultra has a few Hz greater extension in each tune than the PC13-Ultra.I understand that FR and max output capability are not the same. What I was asking was that in 15Hz tune, the PB13-Ultra outputs about 67.5 dB at 10Hz while the PC13-Ultra (while also in 15Hz tune) outputs less than 60 dB at 10Hz (according to the graphs). Doesn't that make the PB13-Ultra slightly more than twice as loud than the PC13-Ultra at 10Hz (while both in 15Hz tune)? Wouldn't this be quite audible?