Picked up a home from my speakers at work...

**bfish** · August 30th, 2009, 08:45 AM

Originally Posted by GM

...still good for ~120 dB/20 Hz before the room's gain is factored in.

GM

Cool. Whole lotta shakin' goin' on. And the next obvious Q...

How well built is the rest of the house?

GM · August 30th, 2009, 11:22 AM

Right on! I rapidly wrecked my house playing pipe organ music and a few movies with similar LFE content, so as long as I live here, having a high SPL sub system is a waste of time/$$$. That said, for a variety of reasons it appears I'm stuck here AFAIK, so if I bother to make another sub system I'll finish boxing in the living room addition's foundation to create a large enough cavity for an extremely low tuned tapped pipe/horn/TQWT (whichever sims best with affordable driver specs) of modest output with an acoustic HF corner below the house's ~14 Hz Fs to minimize it getting a major case of the 'shakes'.

GM

**bfish** · August 30th, 2009, 01:10 PM

Originally Posted by GM

Right on! I rapidly wrecked my house playing pipe organ music and a few movies with similar LFE content...

GM

I was hoping you'd mention that as a reminder that a house' construction/condition is a very real consideration for such a project.

**oface1** · August 30th, 2009, 07:47 PM

Good lawd GM!!

You actually did physical damage with you lfe system to your house? Man, I have seen quite a few loose drywall screws from some systems, but never seen any major structural damage. man...

How long did it take for you to notice the damage?

-chris

GM · August 31st, 2009, 12:17 AM

Oh yeah, a considerable amount. Well, I saw numerous drywall nail pops around the house along with some torn tape joints with the first movie, 'U-571', but it was when the ceiling fell in during a pipe organ symphony at ~live levels that it finally sunk in how bad the situation was. In the dark with all the stuff rattling around the house I didn't hear it tear loose.

Later, I found that a couple of foundation concrete block pilings had split their mortar joints from top to bottom at some point, allowing the living room to oscillate more than normal, but the main problem stemmed from the house being built with 'green' Yellow Pine back in '52, so by the time the sub system was built in '98 the superstructure was immensely more rigid from all the sap hardening, to the point that when I hung a new ceiling the joists, etc. were so hard I had to pre-drill many of the screw holes. Plus, driving four 515Bs at high SPL with output into the low 30s regularly for over two decades probably didn't help matters any.

A pair of SD Contrabasses and 500 W ea. can really 'move' you/wreak havoc on poor quality construction, so when TD remarked awhile back that a pair of DSL DTS-20s and a few kW would drown them out I wondered if my house would still be standing if I'd had a pair of these instead.

GM

**oface1** · August 31st, 2009, 02:27 AM

Oh man!!!,,,,wow!!

Your walls must've been rippling and oscillating to the bw....

My wife would flip the hell out if that happened, but we would eventually laugh about it anyway...

That is crazy, and I trying to get a mental on it, especially you did not it was happening cause you were watching in the dark... wow... have any pics? Would love to see this.....

Later,

-chris

**notloudenough** · August 31st, 2009, 06:52 AM

GM sorry to hear about your home. You almost made me change my mind. The house I bought was built in '32 and doesn't have any drywall in it. All lath and plaster. So, I'm going to soldier on. And I came to the conclusion that I can, and will probably do, both the IB and Horn. The way things are set up I can. I'm not worried so much about the money part. I get the 18" baskets for free and only have to pay for the recone kits at cost. And I already have the seleniums now in BR enclosure. They'll be used 'till I get to building, after I get the new kitchen installed. I tore everything out this weekend. I am also putting in a new bathroom floor. There's a cold air duct in the floor that wants to be turned into a IB enclosure....

**Horn Savant** · August 31st, 2009, 08:56 AM

Originally Posted by notloudenough

has anybody built sub horns exiting up through the floor? .

Here's mine (uses two 416 front corner horn loaded vented to basement)

**oface1** · August 31st, 2009, 09:03 AM

Hey Horn Savant...

Have a few questions...

You have any construction pics or a link?

Do you run a pair of horns?

Or just one horn and a pair of 416's?

How long is you horn's length?

what do you use to integrate it? Active or passively?

Power you are using?

Thanks,

-chris