VividPhase
02-15-08, 02:54 PM
Looking for technical expertise, or first hand experience to answer a couple of questions here (I can and have read through a lot of forum material, so not looking for more popular opinion, but specifics from experts or those that have done this):
I have a Dr. Hsu VTF-2 MK3 in an older duplex rental with fairly poor insulation/separation between the 2 house halves. There's a couple of issues I want to address and am wondering if any and or which of these options would help.
(1) I really like the Hsu sub and enjoy the lower reaching (1-port) setting for HT, however, at the volume I really like it, the port will chuff pretty hard on extremely low scenes (specifically the War of The Worlds pod emerging scene where the street cracks get's it losing control) Beyond getting a turbo module, I'm wondering what else I can do to make it more efficient and louder, without more amplification to the point that it chuffs.
(2) My neighbors have complained about the bass level and transduction shaking the pictures on their shared common wall. I've moved the sub away from the common wall and found a decent placement, but would like to see what options there are for reducing the transferrence of vibrations through the floorboards while still maintaining good sound quality, and addressing point 1 above.
**The duplex flooring is:
/Carpet\
/Thin carpet foam\
/wood floor\
/1 foot crawlspace under both duplexes with minimal insulation\
/earth\
**
The sub is on the carpet with the provided hard plastic spikes.
(1a) Would placing a granite slab under the sub help with sound quality/SPL level at all? I realize the carpet is not absorbing the sound, but wonder if the sound waves were reflected off the dense granite, then maybe more sound would propagate into the room space rather than floor/earth? (What about placing a slab on top of the sub? Is this only to provide more weight to keep the sub from losing any efficiency from cabinet movement, or something else?)
(2a) Would a granite slab under the sub help avoid the sub waves from entering the flooring and reduce transduction and floor flexing from sympathy frequencies in the flooring? Maybe reducing what the neighbors see as vibration on their side? Or would I need to go with a Gramma or some other device to actually "de-couple" the sub from the floor?
--If I did go with a granite slab under the sub, what is the best setup to utilize that in my duplex? I'm thinking:
[SUB]
<rubber feet>
/Granite slab\
\Brass spikes/
/Carpet\
/Thin carpet foam\
/wood floor\
/1 foot crawlspace under both duplexes with minimal insulation\
/earth\
Appreciate the feedback and expert opinion. Not really in a position to drop money on testing the different variables unless I think it really might satisfy either or both of my issues. :)
I have a Dr. Hsu VTF-2 MK3 in an older duplex rental with fairly poor insulation/separation between the 2 house halves. There's a couple of issues I want to address and am wondering if any and or which of these options would help.
(1) I really like the Hsu sub and enjoy the lower reaching (1-port) setting for HT, however, at the volume I really like it, the port will chuff pretty hard on extremely low scenes (specifically the War of The Worlds pod emerging scene where the street cracks get's it losing control) Beyond getting a turbo module, I'm wondering what else I can do to make it more efficient and louder, without more amplification to the point that it chuffs.
(2) My neighbors have complained about the bass level and transduction shaking the pictures on their shared common wall. I've moved the sub away from the common wall and found a decent placement, but would like to see what options there are for reducing the transferrence of vibrations through the floorboards while still maintaining good sound quality, and addressing point 1 above.
**The duplex flooring is:
/Carpet\
/Thin carpet foam\
/wood floor\
/1 foot crawlspace under both duplexes with minimal insulation\
/earth\
**
The sub is on the carpet with the provided hard plastic spikes.
(1a) Would placing a granite slab under the sub help with sound quality/SPL level at all? I realize the carpet is not absorbing the sound, but wonder if the sound waves were reflected off the dense granite, then maybe more sound would propagate into the room space rather than floor/earth? (What about placing a slab on top of the sub? Is this only to provide more weight to keep the sub from losing any efficiency from cabinet movement, or something else?)
(2a) Would a granite slab under the sub help avoid the sub waves from entering the flooring and reduce transduction and floor flexing from sympathy frequencies in the flooring? Maybe reducing what the neighbors see as vibration on their side? Or would I need to go with a Gramma or some other device to actually "de-couple" the sub from the floor?
--If I did go with a granite slab under the sub, what is the best setup to utilize that in my duplex? I'm thinking:
[SUB]
<rubber feet>
/Granite slab\
\Brass spikes/
/Carpet\
/Thin carpet foam\
/wood floor\
/1 foot crawlspace under both duplexes with minimal insulation\
/earth\
Appreciate the feedback and expert opinion. Not really in a position to drop money on testing the different variables unless I think it really might satisfy either or both of my issues. :)