SVS PB10 - Spike at <= 40 Hz ?

[addiwei]

Dear SVS PB10-ISD owners out there,
I've been playing with placement and SPL readings. Anyone else experience the spike from 40 Hz down to god knows what. Crossover set to 60 Hz, I notice a slight dip from 60 Hz to 40Hz. It probably is placement, or my small room, but I pushed the sub out of the corner already. I'm thinking maybe turn down gain on sub...but that would probably worsen the 40-60 hz dip. Any other suggestions?

 

[addiwei]

forgot to mention, my floor is "floating" laminate

 

[Ettepet]

To help you it is vital that you tell us a bit about your room size and layout (room shape, openings to other rooms, mostly concrete walls or...). What I would do is put the sub in the listening position and find the spot where the bass sounds best. There you should place the subwoofer.

 

[bilba]

SVS subs are well enough designed to have a good response. Your problem is most likely due to resonances between walls in your room, otherwise known as "room nodes"

Here's a link to a good article on them....

http://www.homeacoustics.net/Pearls/Articles/DIY Subwoofer Calibration.pdf

 

[bob1]

Can you post a graph ,or at least some numbers it will make it easier to see what's happening.

 

[addiwei]

wow thanks for that article bilba. i'll look into it. ill post some pics soon.

 

[Nic Rhodes]

Room issue at these freq most likely

 

[addiwei]

it seems like pulling the sub foward will help it. going to try that...i'm going to stick this sub in the middle of my room...use it as a coffee table

 

[AngelEyes]

Depending on your Front speakers you could try them set to large, as for some people (me included) it can work better. Try moving it around first though

 

[addiwei]

thanks for the advice. I got to flatten out the response a little more. Speakers are still small. I set crossover to 50Hz. and turned down my subwoofer gain a little more. I also pulled the sub foward 2 inches.