windashine Posted January 22, 2019 Share Posted January 22, 2019 On 1/19/2019 at 5:11 AM, jwc said: Apparently tuned to about 40hz in an undersized cabinet? Or maybe 35Hz? …. just a side question here (for understanding) …. Does the cabinet volume (size) = a set Hz ? Quote Link to comment Share on other sites More sharing options...
jwc Posted January 22, 2019 Author Share Posted January 22, 2019 3 minutes ago, Chris A said: I would if I had one around. You could measure the diameter and length of the port, then do the calculations to get close to the actual Fp. WinISD is a freeware tool that you can use for that sort of thing. Chris Yes. Exactly. I'm betting it is ported lower than 60 in an undersized cabinet. I have a small Yamaha speaker with a 10" woofer and a power amp on the back. It has three setting with one of them being to add low end. It really sounds amazing. I'm betting this is an example of tuned low in an undersized cabinet....to achieve portability. Watts are cheap. The amp is Eq'd differently when used as a satellite. Quote Link to comment Share on other sites More sharing options...
jwc Posted January 22, 2019 Author Share Posted January 22, 2019 2 minutes ago, windashine said: Does the cabinet volume (size) = a set Hz ? No. 1 Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted January 22, 2019 Share Posted January 22, 2019 1 hour ago, jwc said: If the cabinet is tuned to 60Hz,, then that would be trouble to add EQ. Anyone brave enough to take off grill and get port measurements? It's just some screws as I recall. Mine are currently boxed up and put away as I remodel the garage. Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted January 22, 2019 Share Posted January 22, 2019 40 minutes ago, windashine said: …. just a side question here (for understanding) …. Does the cabinet volume (size) = a set Hz ? You have to take the port into consideration. Cabinet size and port volume determine box Fs. Quote Link to comment Share on other sites More sharing options...
MEH Synergy Posted January 22, 2019 Share Posted January 22, 2019 7 minutes ago, CECAA850 said: It's just some screws as I recall. Mine are currently boxed up and put away as I remodel the garage. I'd really like to see some pics of the garage when your done. I bet that setup will be damn impressive to say the least once all is said and done. I still think eq on the bottom end is a bad idea. Limited xmax, increasing distortion I agree with. Chewing up amp headroom and heating the amp up a lot faster. If you dotn have a pro amp on them with metering(which I dotn currently), would also be worried about smoking the tweeters after clipping the amp without knowing so. At highs volumes, your ears won't necessarily hear this before it's too late.... Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted January 22, 2019 Share Posted January 22, 2019 1 minute ago, Westcoastdrums said: I'd really like to see some pics of the garage when your done. Keep checking the CC&C thread. I'm posting pictures as I go. Next Friday is the floors. The spray insulation and the floors are the only think I'm paying someone else to do. Quote Link to comment Share on other sites More sharing options...
jwc Posted January 22, 2019 Author Share Posted January 22, 2019 All in a 3.5 cuft box. 15" Eminence Kappa. So the white curve and yellow curve are a 3.5 cuft box with a 8" length port 4" diameter. The white has a PEQ 40Hzx 6dB Q2. Box is tuned to 29.82Hz in both applications. The yellow line represents a low tuning with a small box....as I was describing....soft knee rolloff. I AM NOT suggesting the 396 is tuned to this....this is an example. The blue and red....are the same sized box with 4" diameter port and no EQ. The Red is what yall are somewhat assuming. Short Port with a tuning of 51,34Hz. The port length here is 0.75 (depth of the baffle). Blue port length is 3" tuned 40Hz. So adding the PEQ to the red example (short port tuned to 51Hz) is a bad idea. However, adding PEQ to the yellow line to get the white line is different. It is ported low frequency in an undersized cabinet. So you are NOT EQing below the tuning point. You need to add watts. jc Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted January 22, 2019 Share Posted January 22, 2019 Shouldn't be an issue adding boost to certain frequencies above the tuning point of the box. Quote Link to comment Share on other sites More sharing options...
jwc Posted January 22, 2019 Author Share Posted January 22, 2019 Was hoping the 396 is tuned like the aqua blue (40Hz)....then add PEQ Q2 +6dB to make it into an Orange. Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted January 22, 2019 Share Posted January 22, 2019 33 minutes ago, jwc said: Was hoping the 396 is tuned like the aqua blue (40Hz)....then add PEQ Q2 +6dB to make it into an Orange. I don't think it's tuned any where near that low. Quote Link to comment Share on other sites More sharing options...
Schu Posted January 22, 2019 Share Posted January 22, 2019 Square peg... round hole. Quote Link to comment Share on other sites More sharing options...
Born2RockU Posted January 23, 2019 Share Posted January 23, 2019 14 hours ago, CECAA850 said: I've found that mine sound best with the garage door open where they can breathe and the doors reflective surface removed. These things need room to operate as they were designed for large venues. *I can see where people are having issues with them enclosed in rooms. Totally agree ! ...It was a struggle getting those tuned within 2db of Flat, in my 18 x 15 Jubilee room (11 ft ceiling). I'm loving them, now ! Quote Link to comment Share on other sites More sharing options...
jwc Posted January 23, 2019 Author Share Posted January 23, 2019 Well. If somebody has the nerve to take off the grill and get the port dims.....I would appreciate it. There seems to be a firm rec here for using them with a sub. I'm optimistic there is another way. Quote Link to comment Share on other sites More sharing options...
windashine Posted January 23, 2019 Share Posted January 23, 2019 13 hours ago, jwc said: I'm optimistic there is another way. . o O (I'm thinking everyone has a #2 Philips in their top desk drawer) Quote Link to comment Share on other sites More sharing options...
Klipsch Employees Chief bonehead Posted January 26, 2019 Klipsch Employees Share Posted January 26, 2019 I think the 396 is tuned around 34 hz. Adding about 4-6 dB will change the cutoff of the speaker. And because of the way a vented system works, will add very little additional distortion. I may try this in the lab....... 4 1 Quote Link to comment Share on other sites More sharing options...
Chris A Posted January 26, 2019 Share Posted January 26, 2019 So is this Bode plot the correct one for the KI-396? (It doesn't appear so if you say it's tuned to 34 Hz.) 1 Quote Link to comment Share on other sites More sharing options...
Klipsch Employees Chief bonehead Posted January 26, 2019 Klipsch Employees Share Posted January 26, 2019 Look at the impedance graph. And remember this is a half space curve. 1 Quote Link to comment Share on other sites More sharing options...
ClaudeJ1 Posted January 26, 2019 Share Posted January 26, 2019 On 1/22/2019 at 10:13 AM, Chris A said: I would if I had one around. You could measure the diameter and length of the port, then do the calculations to get close to the actual Fp. WinISD is a freeware tool that you can use for that sort of thing. Chris You can also use HornResp. JC, your curve looks good to me. Put it in a corner or Just get a sub!!! Quote Link to comment Share on other sites More sharing options...
Chris A Posted January 26, 2019 Share Posted January 26, 2019 It seems to support the Bode plot: But adding 8th space (corner) over half space (floor) loading usually does produce about one octave more low end FR with well-designed Klipsch models. Chris Quote Link to comment Share on other sites More sharing options...
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