Quote:
| Darren wrote:
I'd consider moving the IB location but it looks like yours was quite an ordeal to get set up as it is. It sounds like your listening position is in a huge null... I started with just two drivers in my 3,200 cubic foot room and had plenty of bass for casual listening and HT... when I upped it to 4 the improvement was more in low end reinforcement as you only gain 3db or up to 6db if you double the amp power at the same time.
Did you measure the location before you built?
I know you have probably already checked but could any of the drivers be out of phase with the rest? |
Thanks Darren. The present position was my wife's idea to avoid me scrambling in the rather cramped roof space above the attic listening room.
The SVS cylinder put in exactly the same place as the IB baffle was overwhelming. Which suggested an IB would work well there. Though I didn't do any test tone sweeps with the SVS in that position.
I may just try a battery on the driver cables at the amp end to confirm phase. (despite my confidence in the present situation)
If I can summon the courage I may try a temporary 2 x 2 opposed-driver manifold just to check how it would perform. I can throw some scrap materials together.
The manifold can have a very large opening into the room the size of the present opening covered by the IB baffle. About 6 feet high by 18" wide. This shouldn't spoil the sound quality compared with the array and I really don't want Thomas having any more sleepless nights on my behalf.
I just had another idea! I could turn the array baffle through 90 degree to make it work against the length of the wall rather than across it. Keep the same dimensions and box in one side, the back, top and bottom. That should kill the flexure problem. I could even use a 45 degree back to reduce the space it takes up in the enclosure.
This would be not unlike some of the door mounted manifolds in the Cult examples.
The drivers work against the door frame and the natural stiffness of the wall either side rather than trying to rapidly open and close the door @ 20Hz.