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Converting Klispch RP-160M to Active Crossover - REW/Equalizer APO



Active Member
Nov 21, 2020
I really think you have build in your baffel step for the woofer 1st or the whole thing is going to be way off.

Respectfully you should be gating (I look at both gated and ungated measurements here) or you will likely not have matching SPL levels as even @.5m the room reflections are summing into the responses in different amounts - especially in the bass and lower mids. This will leave the design top heavy /bass light.
Plus even with gating there is still plenty of resolution for the typical basic Xover region.
When designing active in room I start @18"@ look at gated measurements (& also smoothed ungated measurements) and get a fairly accurate sense of what I have building the basics. OP you choose the design axis now, either directly on tweeter or exactly halfway between the woofer and tweete are 2 good ideas. I set the time alignment on my driver's based on physical measurements though I suspect Klipsch already set them well with the deep waveguide so in this speaker it may be done, then I go setting my baffel step and then basic Xover ideas. I usually build in 4-6db of BSC here but some use less(1-3db) if the speakers will be close to the walls. Mine end up out on stands away from walls so the full amount or nearly full amount is best for me. (6db is 'full' BSC). Also make sure you kill that strong looking woofer resonce in the treble so that it is down enough not sum with the tweeter.
Then I move 1meter or more away (2m would be better when designing for Fairfield, if you can use a stand outside or in a massive room with high ceilings. For near, 1m is great) and start to fine tune.
Make sure your mic at 1meter or whatever distance it is, is closer to the drivers than any boundary including the floor.
When fine tuning all my adjustment measures are gated and check your off axis responces. You can add PEQ here to help correct some of the obvious speaker and driver issues you discover but be very conservative with it as the accurate resolution just isn't there like with the Klippel scanner.
I also cross test the results by placing the speaker in the room in situ and from the listening position/listening window I do moving mic steady state energy captures and then compare them with previous MM's from known speakers with similar dispersion. This helps me check the overall energy level balance against a known good example, but works best when they have similar dispersion and the rp160m is very narrow so keep that in mind.
Once place in room in situ you can try room correction.
I also design a high pass for the woofer based on frquency measurements, HD testing, impedance sweep and modeling the woofer in simulation and determining the best way to get maximum output while limiting excursions on deep bass.
I design for Fairfield by the way and as well this strategy would be appropriate for near field.
Others will have ever better approaches and I could add more details s/complexity but the above plan is a good basic minimal start.
Eventually if you make more you can start looking at software that can help to make Spins and design the Xover and a rotating stand that allows you to take many off axis responses easily.
Thanks for your detailed reply, are you suggesting I use near field messurments of the individual drivers in order to design the active crossover ?


Major Contributor
Sep 22, 2021
Albuquerque, NM USA
I don't worry about BSC in an active application. I allow for it once the loudspeaker is completed and in room measurements indicate a need for it. A variable low shelf filter takes care of that nicely.
In all of the setups I've done, no need for it either--windowed correction limit at about 400Hz. All out from the wall be a couple of feet. Has always struck me as curious. Glad to hear others have had same experience. Must be room gain as deficits were never apparent at the listening position msmts.
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