Marvel Posted May 5, 2016 Share Posted May 5, 2016 The title says it all... I'm porting the LS I am refurbishing, and am trying to get some consensus on which is better acoustically or if there is a difference at all. Bruce Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted May 5, 2016 Share Posted May 5, 2016 I would think the only negative to come from rear porting would be that you can't get too close to the wall with it. 2 Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted May 5, 2016 Share Posted May 5, 2016 Can you make the bottom port box where it can rotate 180 degrees? 1 Quote Link to comment Share on other sites More sharing options...
Chris A Posted May 5, 2016 Share Posted May 5, 2016 If the port area is large enough to avoid chuffing, then I'd port forward to minimize the time delay/lobing with the LS bass bin mouths. Chris Quote Link to comment Share on other sites More sharing options...
moray james Posted May 5, 2016 Share Posted May 5, 2016 mounting the ports on the outer most side of the cabinets (left and right) might depending upon your room work to provide some additional corner loading otherwise to the front. 2 Quote Link to comment Share on other sites More sharing options...
Marvel Posted May 6, 2016 Author Share Posted May 6, 2016 I'm not adding a box underneath, just going ahead and enclosing the top/back. Not using the tweeter in the cab, but the one on the top to align the mid and tweeter. Dennis gave me some dimensions for a slot port, and there's room for it above the k400. I've sketched and thought this over for weeks. Having it port to the front makes way more sense. Bruce 1 Quote Link to comment Share on other sites More sharing options...
Carbon_66 Posted May 6, 2016 Share Posted May 6, 2016 Front with the triangle cutouts like the cinema. Quote Link to comment Share on other sites More sharing options...
Carbon_66 Posted May 6, 2016 Share Posted May 6, 2016 Quote Link to comment Share on other sites More sharing options...
mustang guy Posted May 6, 2016 Share Posted May 6, 2016 I like the cinema ports. The KPT-684 has two 8" corner ports which are 13" long. The two ports together equal a single 8" square port...I think... Quote Link to comment Share on other sites More sharing options...
djk Posted May 6, 2016 Share Posted May 6, 2016 "If the port area is large enough to avoid chuffing, then I'd port forward to minimize the time delay/lobing with the LS bass bin mouths." Makes no sense to me. Hornresp will model port position, moving it from the front to the back shows virtually no difference (it will also show you the phase). You will need to have the speakers at least 4" out from the wall. Quote Link to comment Share on other sites More sharing options...
mungkiman Posted May 6, 2016 Share Posted May 6, 2016 I'm not adding a box underneath, just going ahead and enclosing the top/back. Not using the tweeter in the cab, but the one on the top to align the mid and tweeter. Dennis gave me some dimensions for a slot port, and there's room for it above the k400. I've sketched and thought this over for weeks. Having it port to the front makes way more sense. Bruce If you're enclosing the top/back, aren't you limited to rear porting? Quote Link to comment Share on other sites More sharing options...
babadono Posted May 6, 2016 Share Posted May 6, 2016 If you're enclosing the top/back, aren't you limited to rear porting? Doesn't sound like it from Bruce's post, I had the same thought. Sounds like Bruce is going to make the port a slot (not round) and put it where his removed tweeter was. This is cool Bruce, we need pictures! Quote Link to comment Share on other sites More sharing options...
Marvel Posted May 6, 2016 Author Share Posted May 6, 2016 Will definitely do pics... Dennis gave me some different dims., and a 1 x 15 x 5 something deep would/should give a 35Hz tuning. I can adjust the length if necessary. Yes, the slot would go approx. where the tweeter would go (height wise). Bruce Quote Link to comment Share on other sites More sharing options...
mungkiman Posted May 6, 2016 Share Posted May 6, 2016 I missed the no tweeter part. Quote Link to comment Share on other sites More sharing options...
Marvel Posted May 6, 2016 Author Share Posted May 6, 2016 Ideally, I would replace the front baffle and have rhe slot betwee the bass horn and k400, but that would be a little difficult with the ring nails holing that pice in. I'll sketch some more out on the weekend when we get back home from Atlanta. Bruce Quote Link to comment Share on other sites More sharing options...
jason str Posted May 6, 2016 Share Posted May 6, 2016 Ideally, I would replace the front baffle and have rhe slot betwee the bass horn and k400, but that would be a little difficult with the ring nails holing that pice in. I'll sketch some more out on the weekend when we get back home from Atlanta. Bruce Use screws from the inside of the top section and some latex caulk so if you ever want to remove the vent and put things back it won't be a huge chore. Quote Link to comment Share on other sites More sharing options...
DizRotus Posted May 6, 2016 Share Posted May 6, 2016 Does this question have anything to do with that law in North Carolina? Quote Link to comment Share on other sites More sharing options...
Don Richard Posted May 10, 2016 Share Posted May 10, 2016 Undoubtedly. Quote Link to comment Share on other sites More sharing options...
Marvel Posted May 10, 2016 Author Share Posted May 10, 2016 You guys are starting to scare me... 1 Quote Link to comment Share on other sites More sharing options...
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