Axiom Home Page Forums General Discussion Home Theater Thoughts on multiple subwoofer placement

I don't understand how Hsu measures the extension specs on their subs. Bass extension = 15 dB? What does that mean? It plays down to 15 dB... but how much volume is it giving up at that level? Where's the +/- rating?

If you look at their sub comparison page, you see that on one of their subs (the MBM-12), they do list the entire frequency response with a +/- rating... the rest list only the mysterious "extension" number. I know Hsu is a relatively well-regarded sub manufacturer, so this lack of information seems odd to me.

Jason

If you go to the ULS-15's product page, it says "15 Hz - 1 dB."

Ok, I was reading that wrong, still it's odd not to give a +/- rating for the whole range, unless they're not focused on linearity?

Yeah, it would be nice to have greater detail. Considering ULS stands for Ultra Linear Sealed and it "features a woofer with patented super linear motor," I'd think that would be a focus.

Maybe they should add the word "deluxe"?

They don't have to resort to such ultra grandstanding.

A long cable is usually not a problem, RG59 or 6 can be run for as long as you want, but, CV was referring to a RCA cable long enough to reach from one room to another to run REW software, without needing to buy another.

Peener, how would you compare the sound the of the ULS15 to other subs? Are they as strong or do they just have good extension while sacrificing a little output.

My wife has been hinting the PB13 is too big for our room, so I might be looking for another sub and the ULS-15 is on the short list.

Yeah, I'm really interested in feedback on the ULS15s. I love my Hsu VTF3 and would seriously consider adding another Hsu to my HT.

Yeah, even with the EP800s coming, I'd still probably go for another sub for the computer eventually. It's nice to see sealed subs with such low extension and respectable output surfacing. Who knows if I'll ever be able to justify the cost on something that isn't my main system. I'm certainly interested in the ULS-15's performance, though.

I am looking at the ULS-15 and the SB-12's. I believe the ULS has a huge advantage in the low end at 15hz, so it is the front runner at the momment, if I give in to my wife, although she now says she doesn't mind the PB13 enough for me to sell it off and have to look for another one. I know better.....