I am still woundering your thoughts on weather or not I should use two of the 15' kappas for the mid rangs in my set up of if it is just over kill. I will have 4 stacks, each with two SS15 using 3015LFs and powerd from one side of a QSC PL380. Each will have either 2 or 4 Kappa Pro 15As in ported or sealed boxs powered from one side of a QSC PL340. And each stack will have 2 APT 50 and 2 PSD 3006-8 HF drivers powerd from one side of a QSC PL325.
Do I realy need all the Kappa Pros (16) to cover the mids?
Thanks Andy
If Jbels sensitivity reports for the SS15 are correct, it is about 5 dB more sensitive than the 15" Kappa in a ported cabinet.
To sound "fat" usually requires 5-10 dB more LF than mid , so a one to one match should be fine ported, sealed could be marginal at one to one.
One APT 50 and one PSD 3006-8 would be adequate for one mid 15".
Thanks for getting back to me, I was woundering if any one had thoughts on this issue. How do you come up with the sensitivity numbers?
apologize for missing your question 4pyros. The 100db efficiency might have come from eminence on their suggested cabinets for that driver.
http://www.parts-express.com/pdf/290-422c.pdf
The ss15 is in my estimation a 105db cabinet. (possibly more depending on how you want to measure)
The only reason I could think of to use all 16 kappa's is if you are going to '4 way' your box, and run one of the kappa's slot loaded and only run 100-250hz or something like that through that driver. If you were to run a sub that couldn't cross above say, 80hz... it might be a consideration. The ss15 doesn't have a 'cross it low only' limitation.
I think that is an unnecessary complication, just build a straight ported box for your tops with a single kappa pro 15a.
http://www.parts-express.com/pdf/290-422c.pdf
The ss15 is in my estimation a 105db cabinet. (possibly more depending on how you want to measure)
The only reason I could think of to use all 16 kappa's is if you are going to '4 way' your box, and run one of the kappa's slot loaded and only run 100-250hz or something like that through that driver. If you were to run a sub that couldn't cross above say, 80hz... it might be a consideration. The ss15 doesn't have a 'cross it low only' limitation.
I think that is an unnecessary complication, just build a straight ported box for your tops with a single kappa pro 15a.
Hi Jim;
Thanks for your input. I thought the extra Kappa's would be over kill and that I would probably need another amp for them. I did think briefly about setting the two up at different ranges but I have not yet ploted the range of one, and will keep that as a plan B with more amps.
I am learning skechup so I can do some dimensional drawings of your box for our carpenter (cabinet maker) to make the boxs. I have some questions on the differences between your layout in post #53 of the Singel sheet challenge thread and the drawing that was done in post #74 with some odd measurements like 8.97" and 9.07" for the last internal corner, you had 8.75" and 8.75" and in one of the last posts it showed it as a constriction.
My question is witch is closer to your measured cabs? I would like to start from the closest I can get to the original and then change it for 3/4" plywood.
Andy
Thanks for your input. I thought the extra Kappa's would be over kill and that I would probably need another amp for them. I did think briefly about setting the two up at different ranges but I have not yet ploted the range of one, and will keep that as a plan B with more amps.
I am learning skechup so I can do some dimensional drawings of your box for our carpenter (cabinet maker) to make the boxs. I have some questions on the differences between your layout in post #53 of the Singel sheet challenge thread and the drawing that was done in post #74 with some odd measurements like 8.97" and 9.07" for the last internal corner, you had 8.75" and 8.75" and in one of the last posts it showed it as a constriction.
My question is witch is closer to your measured cabs? I would like to start from the closest I can get to the original and then change it for 3/4" plywood.
Andy
Oliver; Sorry I cant read all the Hornresp data yet but was this a ported box? What parameter is the volume of the box? and can I get it to cover 150Hz to 1KHz?
Thanks Andy
Thanks Andy
depending on the kerf of your blade, and the accuracy of your cuts, you may find things vary a fraction of an inch. Oliver's cad drawing is obviously accurate to a degree you won't be in the shop.
Aim for the top of the 'back vertical' board to be 6" from the top and back, make it line up with your baffle board and wherever the bottom points lands... that's it. It'll probably be somewhere around 9 to 9 1/4 from the bottom and the back.
I always take my pieces and lay them out, drawing on each side of each interior panel so there is no confusion before starting assembly. It also gives me a chance to predrill my screw locations through the side so I'm dead center of each board.
Hello,
If anyone is interested I have received real measured graphs from SS15 and CB-18 (15mm panels version) booth built and tested from same builder.
Both loaded with Eminence KappaLite 15LF. Uncalibrated measuring system so not "laboratory" test but booth taken under exact same measuring conditions..
If anyone is interested I have received real measured graphs from SS15 and CB-18 (15mm panels version) booth built and tested from same builder.
Both loaded with Eminence KappaLite 15LF. Uncalibrated measuring system so not "laboratory" test but booth taken under exact same measuring conditions..
Hi 4pyros,
Post #126/127: It's a front loaded horn (FLH) with a small back chamber, and about a 2:1 compression ratio. Just an idea I'm throwing out, maybe the experts have something to say about that in combination with the SS15 and the high frequency horn you have been talking about. It is not very big @ 47 L_net.
I cannot believe, that you have not taken the two or three hours it would take to get a basic grip on Hornresp, come on: "You can do it!" 🙂
Regards,
Post #126/127: It's a front loaded horn (FLH) with a small back chamber, and about a 2:1 compression ratio. Just an idea I'm throwing out, maybe the experts have something to say about that in combination with the SS15 and the high frequency horn you have been talking about. It is not very big @ 47 L_net.
I cannot believe, that you have not taken the two or three hours it would take to get a basic grip on Hornresp, come on: "You can do it!" 🙂
Regards,
Attachments
I do not want to turn this thread into vs. - vs. as despite fact that both are "aimed" at similar freq. range , both designs have different thoughts, initial idea and other goals.
At end line booth are DIY and seems that booth fullfils design goals and do what they are designed for 🙂
here it is:
Attachments
staiper; Interesting comparison, But I would have thought thay both would have rolled off lower. Andy
Thanks stipe, very appreciated !!
I didn't know you had a 15" cb-18? a few details on driver/cabinet please.
also I know some have used jbl, etc.. in the ss15 -- what driver was in this measured ss15?
I'd say pretty respectable response from both cabinets, I appreciate you sharing. Did you happen to grab a reference spl?
And as for the comparison one cabinet vs the other.... I don't mind at all...
- Status
- Not open for further replies.