Your Home Theater ULF Score - Page 95 - AVS Forum
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post #2821 of 2824 Old 01-18-2015, 01:41 PM
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Originally Posted by Brian Fineberg View Post
Cool

How do you tune a port? Those are waaaaay to big for my place
You don't tune the port. Port tune is what the sub is supposed to play down to before roll off begins. Port tune is made up of driver parameters, box size, port size, and amplification. Simulations can help you decide on your dimensions and amplification.
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post #2822 of 2824 Old 01-18-2015, 02:30 PM - Thread Starter
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Originally Posted by jbrown15 View Post
I thought the data-bass 18.1 numbers are for the passive unit using Josh's amp?
Hmmm, good point. I'll look at db to see how many volts it was given...I'm guessing it wasn't that much relatively speaking, meaning the speaker power amp would have enough juice to compensate for the small box.
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post #2823 of 2824 Old 01-18-2015, 03:29 PM
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Originally Posted by dominguez1 View Post
Time to estimate a couple of more subs' ULF performance:

Triax T-18
Reaction Audio PS-18x

Similar to the Chase Subs, the T-18 run a variant of the Eminence 18. Perhaps a starting point would be 3 Chase 18.1 (or 1.5 18.2s)?



For the PS-18X, perhaps similar performance to the UXL?



Thoughts? Sounds pretty reasonable to me.
Supposedly the new T-18 has a bit more output than the original triax but I haven't seen any data posted yet. Someone mentioned they were told 1.5 more db's across the board. According to your estimates it is less powerful. I thought I heard Ricci was going to get one to test.
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post #2824 of 2824 Old 01-18-2015, 04:14 PM - Thread Starter
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Originally Posted by raynist View Post
Supposedly the new T-18 has a bit more output than the original triax but I haven't seen any data posted yet. Someone mentioned they were told 1.5 more db's across the board. According to your estimates it is less powerful. I thought I heard Ricci was going to get one to test.
I would agree that it has more overall output, but my guess that's more in the bass and upper bass ranges given what we've seen of the chase 18in eminence. In fact, it probably has some MASSIVE output in the upper ranges.

But, it wouldn't surprise me if this does have less output in the ULF range than the prior triax. The box is very small for 3 18's and the eminence driver in the chase wasn't a bottom feeder by any means.

Of course, we're comparing estimates to estimates; so really hard to say.
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