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Basement HT Questions

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7 replies to this topic

#1 of 8 OFFLINE   DarrinG



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Posted July 30 2003 - 08:50 AM

When building a HT in a basement is it OK to overlay carpet on the cement floor or will it cause you to lose bass due to the concrete absorbing it or should a sub floor be put in. Also risers how high should a riser be?

#2 of 8 OFFLINE   Wayne_D



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Posted July 30 2003 - 11:29 AM

from what i under stand, if you want to feel your bass vibrate your seats more, then you should build a sub floor. plywood over 2x4's should be good...as for riser...depends on how large your screen is, and how high your back seats need to be so you dont have a head in the way!

#3 of 8 OFFLINE   Neil Joseph

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Posted July 30 2003 - 04:39 PM

Carpeted concrete is better for your acoustics than a bare concrete floor but as mentioned, a wood sub floor will do wonders for your bass in the room.
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#4 of 8 OFFLINE   Torgny Nilsson

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Posted July 31 2003 - 06:17 AM

I used to live in an upstairs condo and my sub sounded great. It felt like I was in the rocket when I watched the From the Earth to the Moon series on DVD. I then moved to a home with concrete floors. While I can still hear the bass, the feeling is gone. Carpets, wood floors, etc. have done nothing to alter that. From what I have learned, the only way to get the bass feeling back is to build a sub-floor (or super-floor).

#5 of 8 OFFLINE   TimForman


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Posted July 31 2003 - 06:38 AM

When dealing with low frequencies many have the misconception that concrete walls and floors are somehow better. This is completely incorrect. While your neighbors may appreciate the sound not coming through the walls reflection of LF sounds terrible. For good LF you want the boundaries to move. This means wood framed walls, floors and ceilings. Some build double offset walls to provide even more movement. If this is not practical for you then at least get good thick foam pad and carpet on your floor. Something I noticed the other day since I have a concrete floor with pad and carpet, I could still feel the vibration from my Tempest. LF is an amazing creature.

#6 of 8 OFFLINE   DarrinH


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Posted August 01 2003 - 02:42 AM

Hey DarrinG this is DarrinHPosted Image.
My HT is in my basement.
The walls were built about an inch from the block, drywalled and then treated with carpet for zero reflection.
My floor has padding with carpet and my ceiling consists of drop tile.

I have a SVS 39" tall sub and I can tell you the floor does not transmit any bass.
The ceiling really moves and the walls move enough.
From experience, if you want the whole room to shake you are going to have to build that subfloor. I am happy with mine the way it is and I plan on adding bass shakers for the tactile transmission of bass later.
Hope this helps.
President of the WV Home Theater Group

#7 of 8 OFFLINE   Jeff La Clair

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Posted August 01 2003 - 05:54 AM

I also have my Entertainment center in the basement w/ padding and carpeting over concrete and acustical tiles in the ceiling. I have also installed insullation in the ceiling and walls. I have a klipsch 12" sub and I can feel my sectional Vibrate. The best movie I have watched is "We were soldiers" during the "Broken Arrow" sceen. It felt awesome! Jeff

#8 of 8 OFFLINE   David Preston

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Posted August 01 2003 - 11:30 PM

Hey Jeff I just checked out your HT that is one sweet entertainment center. Looks like lots of hard work but it paid off. Nice HT.

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