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Maz4bz

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    Australia
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    Alpine SWR 1522 DIY Budget Build Sub
    Alpine SWR 1540 DIY Budget Build Sub

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  1. Thanks for the feedback Harry. So glad you enjoyed the outcome. It's a big investment of time and effort to upgrade the KG's as we've done but the results, I feel, are warranted. In the meantime, I've been enjoying looking at looking at Erin's Audio Corner where he uses a Klippel nearfield scanner (worth $100k) which gives a full suite of measurements. Comparatively I look at the polar of a JBL 4329P, for example, and see terrific likeness with the KG's performance. What I'm trying to say, I guess, is that the performance achievable with the KG 5.5's very high for the entry price. Enjoy! 🍻
  2. Looks like you have a short circuit. It's pretty easy to do. I have! Always a good idea to measure before risking a nice amp like yours. I'd retrace all your solders to identify where it deviated from your plan. Good luck!
  3. What's the measured impedance/resistance at the speaker binding posts when the crossover is installed and all the drivers are connected?
  4. Sounds like an interesting plan, if you have measurement gear it might be worth it. Without measurement gear it'd be a bit like pin the tail on the donkey, so to speak. 😅 I would be surprised if you could hear a difference between an optimised KLF 10 with factory parts and a Frankenstein version, to be honest. In my opinion Klipsch used very good quality parts in these speakers and probably took great care to optimise the horn and driver combo. If it were me, I'd be using the Faital with a matching Faital horn in a new build and keeping the KLF factory, other than the crossover. Either way, good luck!
  5. Hi there, Looking at the brochure for the KLF 10 I'm going to say no it probably won't. The KG uses different drivers albeit I can see the tweeters use the same diaphragm. Naturally you can have a try and see if you like the result, the cost and effort is low and the modifications are completely reversible. For sure the KLF 10 is a two way like the KG 5.5 so changing to 2.5 will certainly assist. The only way to know for sure would be to measure the result once built up and compare to the original unmodified measured performance. Another KLF 10 owner made the L-pad modification that I did here (but tweaked to suit the KLF 10 crossover) and reported positive results, perhaps worth a read? Good luck and please do report back if you go ahead. 🍻
  6. It looks ideal in theory - I'm modelling using my KG 5.5 measurements. We need YOUR KG4 measurements for this to work. Without your measurements this is all just guess work. 🧐
  7. All good Matt, I would still be interested in your objectives here. Mine are to get the smoothest on and off axis response possible with highest efficiency - without too much cost in crossover parts. Updated now with 0.2mh on the .5 woofer....
  8. Hi Matt, I wonder if I've missed something but I am wondering what's your objective(s) here? When I saw that 500mh inductor on the lower woofer I figured I might model that and show what that kind of value is going to have on your system. So what I've done here is use Xsim and the measurements for my KG 5.5's to show what I mean. So obviously this isn't exactly what your KG4 will be doing. To model your KG4 accurately we'd need your frequency response measurements. But seeing as we don't it is still useful as an exercise to underscore that changing the crossover without measurements is, well, lets say problematic. Here is your modded crossover as I've translated it into Xsim.... Here's the modelled impedance curve (using KG 5.5 data).... Here's the modelled frequency response - black = system; yellow = tweeter; blue = upper woofer; green = lower woofer... So, that lower woofer is playing 40 db down. When I first modelled this I had the vertical scale set to 5db and thought I'd made a mistake because the lower woofer curve was missing! 40db down means it may as well not be connected. You won't hear anything from it! Plus that's a very expensive inductor if you can buy one? Not that you would want to. For comparisson sake here's the original KG4 crossover using my KG 5.5 data - purely acedemic naturally but thought I'd show it for completeness.... So back to my question, what's your objective here? Checking the impedance for its minimum is great for ensuring you're amp is going to be safe, but the impedance is just a small part of the picture. Without frequency response measurements I'm at a loss as to how you'll be able to arrive at a remotely workable crossover? I apologise if I am coming across as negative. That's not my intention. Cheers. 🍻
  9. I forgot you said you have the DATS - that's great! No idea how much mass to add but it'll be easy for you to determine. To do this measure a woofer with DATS and use the T&S specs you get with Hornresp or WinISD etc to model up the Dayton PR to get you how much mass to add to it. You could then use your mic to measure the speaker to compare modelled with the actual result to fine tune. Would be great for you to post the T&S data you take from your MidWest Audio 8" woofers into the Klipsch Impedance Curves thread for others to find too. Good luck! 🍻
  10. Looking fantastic Matt! Seeing as you've changed the woofers perhaps if you have trouble finding original passive radiators you might simply purchase a Dayton PR to fit and a calibrated mic so you can tune the PR to your taste but with a little data to help you dial in what you're hearing? The mic will take out the guess work and if you haul a cabinet outside you can easily take ground plane measurements to accurately verify your results. You could even use an Audyssey mic plugged into your PC with REW and get an accurate result - I've tried this and it works great. Good luck! 🍻 ...
  11. Dear all, another minor update - more data. I wanted to confirm the modelled WinISD bass response using the DATS measurements I'd taken from the woofers. Here's the modelled response of the two KG woofers showing a tuning frequency in the high 40hz with a 2.5db hump above this.... I recently had a chance to haul one of my KG's outside for some ground plain measurements. I wanted to see how the modelling compared to measured... This measurement approach enables a more accurate measurement of the bass response of a system. These are done at 1m with Omnimic.... Next is a series of distortion measurements at 5db intervals with reference to 100hz..... 95db: 100db: 105db: From this I think we can deduce that the 2.5 way alignment has strong bass response down to 30hz and is very clean/low distortion up to dangerously high SPL - remembering permanent hearing damage onset is 87db. In the years I've had my KG's I've had numerous speaker systems through my home, but I keep coming back to the KG's. They remain my reference speaker. 🙂 Cheers. 🍻
  12. I have this horn with a P-Audio BM-D450S. The horn is very well constructed. Measurements: Horizontal... Vertical: Distortion Energy storage Measurement setup - Omnimic with 5ms gating, driving an AX-550 with mic at 1m with turntable graduated in 10 degree increments.... BM-D450SMKII.pdf
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