Originally Posted by mojomike
On what point of reference to you base your assumption that the PB13 is more accurate in sealed mode? Accuracy would imply a flat frequency response and low distortion. Independent tests as well as data supplied by SVS show that the PB13 is almost ruler-flat and exhibits very low distortion in 20 hz ported mode and especially in 15 hz ported mode when tested in ground-plane conditions. The results show much flatter responses and much lower distortion compared with the sealed mode under the same ground-plane test conditions. Which would test flatter in-room would be very much dependent on the conditions of the room. Inherently, without depending on room boundaries, the PB13 is considerably more accurate in 15 or 20hz modes according to the tests. This too is supported by my own tests in a very large room that is wide-open to the rest of my house.
Accuracy was the right wor d. I forget at times just how re ady you guys are to pounce. I should have said tighter, but sealed boxes ARE more accurate.
Sorry for the ass umption. You are right the 15 hz mode is very nice. This sub is very accurate overall.
But as you were contradicting your self,
I do agree that it does entirely depend on the room in which the sub is placed. I have read that sealed boxes provide a more accurate sound. I have seen this everywhere.
Beleive it or not I and others have heard this too.
On the other foot, output is dimminished and they can not achieve(easily) the lower frequencies of their ported bretheren with out much more power to the same size driver.
I do not know about you, but I listen to mine in my dedicated media/HT room, not in ma back yard.(ground plane?)
The sealed mode shows the flattest over all line on the graph, with the 15hz and 20 hz rolling off fast just past their name sake hz.
Here is the graph for your inspection. As you inspect the graph notice not one of those lines is ruler flat....
I appreciate your enthusiasm in calling me out.
Still you did not answer my question.
nor did you add anything that was in the spirit of my post.
So in your opinion, what do you, mojomike, think about running dual ULTRAs. One in Sealed mode and the other in ported mode say 15hz or 20hz? Will they play nice together? Kinda like me and you?