Paducah Home Theater Posted April 7, 2015 Share Posted April 7, 2015 I thought the stonehenge boxes were sealed? Apparently not? Quote Link to comment Share on other sites More sharing options...
dewthedru Posted April 7, 2015 Author Share Posted April 7, 2015 nope. def ported on the side. Quote Link to comment Share on other sites More sharing options...
Scrappydue Posted April 7, 2015 Share Posted April 7, 2015 i actually would run them length wise so to me they would be poted in the front and the driver would either be mounted on left or right side. Quote Link to comment Share on other sites More sharing options...
dewthedru Posted April 7, 2015 Author Share Posted April 7, 2015 So the port would be towards the listener or towards the back wall? And the driver firing into the listening area or towards the side wall? Quote Link to comment Share on other sites More sharing options...
Paducah Home Theater Posted April 7, 2015 Share Posted April 7, 2015 (edited) i actually would run them length wise so to me they would be poted in the front and the driver would either be mounted on left or right side. Interesting. I'd probably do the opposite. Seems like doing this would lose some of the details and punch on the directional upper end of frequencies for music, while firing omnidirectional sub-bass that doesn't matter in terms of how its pointed right towards the listener, plus any midrange that comes through the port which is sometimes a down side of ported boxes would be ushered right towards your ears instead of being allowed to dissipate. What could be interesting though is if you could do what you're saying but then attach the two boxes into a dual-opposed situation so the box vibrations cancel each other out. Probably no reason why you couldn't do this. If they're going to be right beside each other anyway and this layout is chosen seems like you'd want to. Edited April 7, 2015 by MetropolisLakeOutfitters Quote Link to comment Share on other sites More sharing options...
Scrappydue Posted April 7, 2015 Share Posted April 7, 2015 Not sure what you would "midrange" and "upper frequencies" coming to your sub? I doubt you would hear any of that otherwise companies like Svs that every sub is front ported wouldn't sell any products. This goes for a ton of the other Id companies as well. Quote Link to comment Share on other sites More sharing options...
Paducah Home Theater Posted April 7, 2015 Share Posted April 7, 2015 (edited) Not sure what you would "midrange" and "upper frequencies" coming to your sub? I doubt you would hear any of that otherwise companies like Svs that every sub is front ported wouldn't sell any products. This goes for a ton of the other Id companies as well. http://www.kicker.com/Ported_Enclosure_Pros_and_Cons "Cons... 2 - Midrange sound coming from inside the box through the vent can produce unpleasant sound coloration." http://www.ellisaudio.com/porthole.htm "A front porthole will spit midrange port noise directly into the listeners face while the rear porthole will diffuse this midrange noise." http://barefacedbass.com/technical-information/the-mysteries-of-ports.htm "significant detrimental midrange output from the ports" http://www.soundonsound.com/sos/apr07/articles/subwoofers.htm "harmonic distortion and audible port noises, or other artifacts. These occupy the mid-frequency range" I'm sure you can minimize it by design but potential midrange noise coming through the ports is a known issue. Rear porting is known to reduce it. Edited April 7, 2015 by MetropolisLakeOutfitters 1 Quote Link to comment Share on other sites More sharing options...
derrickdj1 Posted April 7, 2015 Share Posted April 7, 2015 Turn the sub toward the wall an compare it to front firing. Keep the one you like best. Thanks for the links Metro. Quote Link to comment Share on other sites More sharing options...
dewthedru Posted April 7, 2015 Author Share Posted April 7, 2015 (edited) Turn the sub toward the wall an compare it to front firing. Keep the one you like best. Thanks for the links Metro. you're suggested i simply rely on my ears instead of endlessly searching for "the best" way to do it per some stranger's advice or internet article? Edited April 7, 2015 by dewthedru 1 Quote Link to comment Share on other sites More sharing options...
derrickdj1 Posted April 7, 2015 Share Posted April 7, 2015 (edited) Turning a sub toward the wall will 1.) load the driver and 2.) help filter out for the lack of a better word some of the higher frequencies. Downing firing would be the best choice. I have had front firing, down firing and rear ported subs. Midrange voices have not been a problem with any of the subs that I have owned. Low bass is omnidirectional. But, there are higher order harmonic that may call attention to the size that can be help by firing the sub into the wall or using a down firing sub. Bass decay and reverb may also be a room problem. Edited April 7, 2015 by derrickdj1 Quote Link to comment Share on other sites More sharing options...
dewthedru Posted April 7, 2015 Author Share Posted April 7, 2015 Turning a sub toward the wall will 1.) load the driver and 2.) help filter out for the lack of a better word some of the higher frequencies. Downing firing would be the best choice. I have had front firing, down firing and rear ported subs. Midrange voices have not been a problem with any of the subs that I have owned. Low bass is omnidirectional. But, there are higher order harmonic that may call attention to the size that can be help by firing the sub into the wall or using a down firing sub. Bass decay and reverb may also be a room problem. Quote Link to comment Share on other sites More sharing options...
derrickdj1 Posted April 7, 2015 Share Posted April 7, 2015 (edited) If midrange voices are come from the sub/s, set a lower XO point in the avr below 100 or 80 Hz. If the voices are still coming thru the sub, set the XO on the sub also. This is not commonly needed but, it can be done. The key point is proper setup. One can also lower the sub level to 73 db or lower. I calibrate each of my four sub to 63-64 db so that the combined spl is slightly less than 75 db. I rarely sub the subs hot. This keeps the bass balanced with the mids and hi's. Good clean balanced bass is the goal, not things falling off the wall. That may happen any way, lol. Omnimic or REW are good tool to check the FR, reverb, bass decay and a few other things. Edited April 7, 2015 by derrickdj1 Quote Link to comment Share on other sites More sharing options...
dewthedru Posted April 8, 2015 Author Share Posted April 8, 2015 Almost done! Going to be crazy with 2 of these pumping! http://i.imgur.com/uHNWZPr.jpg Bottle for scale Quote Link to comment Share on other sites More sharing options...
wvu80 Posted April 8, 2015 Share Posted April 8, 2015 (edited) (respectful Snip! I just wanted to reference the post) I'm sure you can minimize it by design but potential midrange noise coming through the ports is a known issue. Rear porting is known to reduce it. I gave you a "like" for your post and I wanted to comment, I found all the articles helpful. You did a really nice job of documenting. Edited April 8, 2015 by wvu80 1 Quote Link to comment Share on other sites More sharing options...
dewthedru Posted April 8, 2015 Author Share Posted April 8, 2015 This is what the inside looks like http://i.imgur.com/fRvpczp.jpg 1 Quote Link to comment Share on other sites More sharing options...
mustang guy Posted April 8, 2015 Share Posted April 8, 2015 That is gonna be some crazy bass! On the topic of placement, they were designed shallow yet wide and tall so they did not protrude so far into the room. It doesn't force you to place them that way, but it was the original reason for the design. Frankly, blocks in the corners and the driver facing down would make these like a table. That way you could turn them in any direction. Quote Link to comment Share on other sites More sharing options...
dewthedru Posted April 8, 2015 Author Share Posted April 8, 2015 Hey...quick question. What kind of treatment should I put inside? Do I need to get some accoustic egg foam? If so, where can I buy it? Should have thought of this before tonight! Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted April 8, 2015 Share Posted April 8, 2015 From your instruction sheet: Ported subwoofers don't need as much stuffing as sealed ones. Most people just line the inner walls with poly batting, or acoustic foam. Some people don't use any stuffing or lining at all. Quote Link to comment Share on other sites More sharing options...
Paducah Home Theater Posted April 9, 2015 Share Posted April 9, 2015 This is what the inside looks like http://i.imgur.com/fRvpczp.jpg That's not a subwoofer box, that's a temple for the god of thunder. 2 Quote Link to comment Share on other sites More sharing options...
dewthedru Posted April 9, 2015 Author Share Posted April 9, 2015 that's great! i'll have to remember that. Quote Link to comment Share on other sites More sharing options...
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