slovell Posted April 13, 2014 Share Posted April 13, 2014 What would be a good crossover point for a 12" sub being matched with KLF-20's? Quote Link to comment Share on other sites More sharing options...
derrickdj1 Posted April 13, 2014 Share Posted April 13, 2014 The speaker can be xo at 80 or slightly less if you are using a sub. Quote Link to comment Share on other sites More sharing options...
slovell Posted April 13, 2014 Author Share Posted April 13, 2014 Pardon my ignorance, if the KLF's are rated to go down to 34Hz why cross them over at 8oHZ? Why not 40Hz or 60Hz? I'm just trying to learn something here. Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted April 13, 2014 Share Posted April 13, 2014 A rule of thumb is to cross them over one octave above their lowest rated frequency. A crossover is not a brick wall and there'll be info sent to them below the crossover point and you want them to be able to play it cleanly. Quote Link to comment Share on other sites More sharing options...
ChuckAb3 Posted April 13, 2014 Share Posted April 13, 2014 IMO there's no reason not to cross them over at 40 hz and that's what I've done with great success. I have KLF-30's up front. It should work for you, too. Quote Link to comment Share on other sites More sharing options...
derrickdj1 Posted April 14, 2014 Share Posted April 14, 2014 (edited) As mentioned, xo one octave above is a good rule of thumb. I suggested 80 Hz or a little lower. This will allow for the least distortion, increase dynamic for the midbass and up, and increase avr/amp headroom. There will be less speaker cone breakup with the speaker not having to reproduce deep bass. If one is using a sub, what is the point trying to get the speaker to do the subs job. Those funny little square boxes were desing for only one purpose, reproducing bass. Any speaker that does not have a 15 in woofer or two 12 in woofers can benefit from a sub. Edited April 14, 2014 by derrickdj1 Quote Link to comment Share on other sites More sharing options...
slovell Posted April 14, 2014 Author Share Posted April 14, 2014 OK, if I cross the KLF's over let's say at 60, where should I cross over the sub? Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted April 15, 2014 Share Posted April 15, 2014 OK, if I cross the KLF's over let's say at 60, where should I cross over the sub? If You're using an avr for crossover duties, set it at 60 and turn the filter on the sub all the way up in effect disabling it. Quote Link to comment Share on other sites More sharing options...
Aj72 Posted June 23, 2014 Share Posted June 23, 2014 I cross over KLF-30's at 80Hz and subs at 80Hz also. I really don't know why, perhaps it's because my subs do such a great job but without the subs on, running the KLF's large the bass seems to be lacking. For two twelve inch woofers per speaker there doesn't seem to be much punch. Don't get me wrong I still love them. I don't know about the KLF 20's but 80Hz with sub would be my suggestion. 1 Quote Link to comment Share on other sites More sharing options...
SWL Posted June 23, 2014 Share Posted June 23, 2014 without the subs on, running the KLF's large the bass seems to be lacking I would investigate. KLF-30's lacking bass....something's not right. Quote Link to comment Share on other sites More sharing options...
ChuckAb3 Posted June 23, 2014 Share Posted June 23, 2014 As I previously mentioned, I cross my 30's over at 40 hz. What I failed to mention is that the 30's kick a** in the bass department even without a sub. I ran my HT for quite a while without a sub and with great bass. When I wanted more, I added a sub. If your 30's are lacking bass, something IS WRONG. These speakers move some air! Unless, of course, something is wrong. I'd get it checked out. I'm not techinically inclined, but some of these other guys are and I would ask for help in how to trouble shoot for malfunctions, either in the speakers or the sub or the other electronics. Quote Link to comment Share on other sites More sharing options...
Aj72 Posted June 24, 2014 Share Posted June 24, 2014 (edited) Hmmmm. Sounds like you guys opened up a can of worms for me or I opened them up for myself! I replaced both sets of woofers with Crites woofers and if I was just using the KLF's without a sub I'd feel very lacking in the bass department. I thought it was because my subs made it a night and day difference but sounds like you could be onto something. I'm happy all the same because the subs do nearly all the work but got me thinking. might try my KG 5.5's up front to see if they have any more bass without subs on. I do have a fairly good appetite for bass and maybe the preamp settings causing this? I run large setting and disable sub but not a huge difference to when set to small? I may leave it if the KG 5.5's yield a similar result and try my old receiver which I know was fine. Edited June 24, 2014 by Aj72 1 Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted June 24, 2014 Share Posted June 24, 2014 Check the polarity on your wiring. If one of them has been wired wrong, there'll be no bass. They'll cancel each other out. Quote Link to comment Share on other sites More sharing options...
SWL Posted June 24, 2014 Share Posted June 24, 2014 without the subs on, running the KLF's large the bass seems to be lacking I would investigate. KLF-30's lacking bass....something's not right. There could be a whole list of things wrong with KLF-30's right out of the box....they've had their issues straight from the factory. Loose panels/cabinets is the first thing that comes to mind. That could cause a loss of bass right there but I'd check everything from placement, location, connections etc. I've heard plenty of KLF-30's sound terrible for one reason or another. Fixed up properly and they're a world class speaker. The same can be true for many other Klipsch models but it's well worth the effort to find out what's wrong. ....or maybe you are just running your subs hot and when you turn them off it seems as if the bass is lacking? Quote Link to comment Share on other sites More sharing options...
Aj72 Posted June 25, 2014 Share Posted June 25, 2014 (edited) "....or maybe you are just running your subs hot and when you turn them off it seems as if the bass is lacking?" This is what I think to be the culprit. I do like my bass and do run hot around +14. I have dual eighteen inch subs which would skew anyone's judgement once turning them off. I think it's possibly just a case of bass addiction here. Definitely no loose panels. I run a short jumper wire from the two red's and two black's for each speaker with a Banana plug connected to the bottom corresponding color with the speaker wire then connecting to corresponding color binding post on amplifier. Red to Red (short jumper wire connects two binding post on speaker) then bottom Red binding post Speaker to Red binding post on Amplifier for corresponding channel. Same for black. Sorry OP didn't mean to hijack thread. Edited June 25, 2014 by Aj72 1 Quote Link to comment Share on other sites More sharing options...
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