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Old 12-31-07, 09:15 AM   #1 (Link)
 
Conrad.
Shackster
Alias: Conrad
Loc: London
User: #3578
Since: Oct 2006
Posts: 19
Conrad. is offline
I think I have a problem.


Hi all,

I've been reading this forum for a while now and I've found it hugely informative and excellently written by people who clearly know their stuff.

Between you all you've managed to convince me that my system could (and should) sound better. With this as my goal I've bought into the whole REW/BFD solution and I have some findings that I'd like your opinions on.

My set up is an HTPC which is passing a decoded signal out to my Yamaha RX-V1500's pre-ins. THe sub output from the multi-channel outputs on the Yamaha is being split to a pair of Velodyne SPL1000 subs. These subs aren't co-located, one is forward facing just inside the right main and the other is in a deep bay at the back of the room, firing diagonally across the back of the seating area. I've tried to illustate this in the attached plan. The room dimensions are about 22ft x 14ft at it's widest/longest. THe bay is just over 5ft deep by 8ft wide and the ceilings are about 11ft high.

My first pass with REW produced the attached results. Initially I thought that this was excellent and that REW couldn't change it much because it didn't need changing but that drop from 20-40Hz (or a huge hump at 40Hz, whichever way you want to look at it).

I was thinking of dropping my target level down to 64dB and seeing if I couldn't EQ the hump down rather than try and boost the low frequencies (a real no-no, apparently). Is that the right approach to take? Should I focus more on placing the subs differently? I don't have a lot of options on that front unfortunately. Or should I just sell both subs and buy a Monolith?

I know that 2 good subs don't equal 1 great sub and that I can't expect my house to shake with the pair that I have but they should go way below 40Hz, right?

Any help would be appreciated. I'm posting this on AVForums as well, and I'll try and transfer interesting points and comments between the two.

Thanks in advance.

Conrad

Attachments
File Type: jpg graph1.jpg (79.6 KB, 139 views)
File Type: jpg room layout.jpg (72.2 KB, 139 views)

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