[klh]

If shortened for a CC, would the port length/width need to be alterred?

How would it fare as a CC if between two OB-5's? There is quite a difference in sensitivity.

[Danny Richie]

If shortened for a CC, would the port length/width need to be alterred?

Only if you want to maintain the same tuning frequency. A center channel can be allowed to be tuned higher.

How would it fare as a CC if between two OB-5's? There is quite a difference in sensitivity.

Actually it will match quite well. The sensitivity difference might not be as much as you think depending on your room. You might be sitting a little closer to the center channel than the left or right mains.

[klh]

Good point... I didn't think about the differing distances to each speaker!

I'm thinking about getting 5 of the O-3's for my 5 channel HT and then getting a couple OB-5's after upgrading to 7.1. Initially all would be crossed over to the sub at 80Hz (non-adjustable crossover... so it's either cut 'em off there or the run 'em full range). After upgrading to a new 7.1 pre/pro or receiver I'm sure I'll have better bass management at my disposal.

[Danny Richie]

Sounds like a great plan to me.

[Danny Richie]

The O-3 enclosure drawings are now up on our site. 

http://www.gr-research.com/pdf/O-3%20box.pdf