senzlez2 Posted May 14, 2023 Share Posted May 14, 2023 hello I built a new crossover for my Klipsch rf-83 my old crossovers was burnt on 2 of the boards, I just need to double check if this is right, probably not. its coming sound out and the speaker lacking a little in bass, but when I push the volume up the amp cuts out, I followed this crossover schematic I just used the leads of the caps and resistors and. coils mostly, it doesn't look pretty I used the stock coils from the bad crossover boards, regards Quote Link to comment Share on other sites More sharing options...
mboxler Posted May 14, 2023 Share Posted May 14, 2023 44 minutes ago, senzlez2 said: hello I built a new crossover for my Klipsch rf-83 my old crossovers was burnt on 2 of the boards, I just need to double check if this is right, probably not. its coming sound out and the speaker lacking a little in bass, but when I push the volume up the amp cuts out, I followed this crossover schematic I just used the leads of the caps and resistors and. coils mostly, it doesn't look pretty I used the stock coils from the bad crossover boards, regards Looks to me you are missing a common ground wire on each circuit. I assume the bottom of the picture is input? If you run another black wire from the bottom right screw to the top right inductor (where the other black wire is connected) the woofer circuit should work. Likewise on the tweeter circuit. Unless you connected them underneath the board??? Mike 1 Quote Link to comment Share on other sites More sharing options...
winglet Posted May 14, 2023 Share Posted May 14, 2023 Schematic looks correct. Just make sure all those grounds are connected like in this schematic.. Quote Link to comment Share on other sites More sharing options...
Maz4bz Posted May 14, 2023 Share Posted May 14, 2023 What's the measured impedance/resistance at the speaker binding posts when the crossover is installed and all the drivers are connected? Quote Link to comment Share on other sites More sharing options...
mboxler Posted May 14, 2023 Share Posted May 14, 2023 When I simulate the circuit the way I think it is now, the impedance drops below 2 ohms around 1khz. Then it sharply increases to 50 ohms at 2khz. That's a tough load on an amplifier. Quote Link to comment Share on other sites More sharing options...
senzlez2 Posted May 14, 2023 Author Share Posted May 14, 2023 thanks for the help mboxler, I have only used the speaker once with the amp, Im now in the process of disassemble and attach ground Quote Link to comment Share on other sites More sharing options...
senzlez2 Posted May 17, 2023 Author Share Posted May 17, 2023 On 5/14/2023 at 3:39 PM, mboxler said: Looks to me you are missing a common ground wire on each circuit. I assume the bottom of the picture is input? If you run another black wire from the bottom right screw to the top right inductor (where the other black wire is connected) the woofer circuit should work. Likewise on the tweeter circuit. Unless you connected them underneath the board??? Mike hello again, I has attached ground on tweeter and bass section, its still cutting out when pushing the volume, maybe I have changed the impedance of the whole speaker ? im using a Yamaha a-s1200 Quote Link to comment Share on other sites More sharing options...
mboxler Posted May 17, 2023 Share Posted May 17, 2023 5 minutes ago, senzlez2 said: hello again, I has attached ground on tweeter and bass section, its still cutting out when pushing the volume, maybe I have changed the impedance of the whole speaker ? im using a Yamaha a-s1200 Hmmm. Can you post another picture of the new crossover? Also, it might be a good idea to measure the DCR of the voice coils on all your drivers. Perhaps whatever damaged your crossovers also damaged a driver. Quote Link to comment Share on other sites More sharing options...
senzlez2 Posted May 17, 2023 Author Share Posted May 17, 2023 14 minutes ago, mboxler said: Hmmm. Can you post another picture of the new crossover? Also, it might be a good idea to measure the DCR of the voice coils on all your drivers. Perhaps whatever damaged your crossovers also damaged a driver. Quote Link to comment Share on other sites More sharing options...
senzlez2 Posted May 17, 2023 Author Share Posted May 17, 2023 I have only 1 speaker hooked up to my amp with new crossover, Quote Link to comment Share on other sites More sharing options...
mboxler Posted May 17, 2023 Share Posted May 17, 2023 39 minutes ago, senzlez2 said: I have only 1 speaker hooked up to my amp with new crossover, On the speaker with the new crossover, disconnect the speakers from the crossover and measure the DCR from the + wire through the tweeter to the - wire. Do the same with the woofer(s). Hopefully there isn't a short of some kind. Quote Link to comment Share on other sites More sharing options...
OO1 Posted May 17, 2023 Share Posted May 17, 2023 replace with new coils , make sure you did not cross any wires and verify all the polarities Quote Link to comment Share on other sites More sharing options...
senzlez2 Posted May 17, 2023 Author Share Posted May 17, 2023 2 hours ago, mboxler said: On the speaker with the new crossover, disconnect the speakers from the crossover and measure the DCR from the + wire through the tweeter to the - wire. Do the same with the woofer(s). Hopefully there isn't a short of some kind. ok so how do I measure DCR what settings on a multimeter, I tried searching around Quote Link to comment Share on other sites More sharing options...
winglet Posted May 17, 2023 Share Posted May 17, 2023 26 minutes ago, senzlez2 said: ok so how do I measure DCR what settings on a multimeter, I tried searching around Ohms. Probably on the smallest scale on your multimeter if it has different ranges. They’ll measure in single digits or low tens depending on the driver Disconnect the drivers from the network and measure them individually. Quote Link to comment Share on other sites More sharing options...
senzlez2 Posted May 17, 2023 Author Share Posted May 17, 2023 I measured the drivers from the other speaker , the only reading I could get was in ohms and a 200 setting, tweeter 5ohm, and the bass drivers 9.7 ohm each Quote Link to comment Share on other sites More sharing options...
mboxler Posted May 17, 2023 Share Posted May 17, 2023 What ohm reading do you get on the drivers in the speaker with the new crossover? Quote Link to comment Share on other sites More sharing options...
senzlez2 Posted May 17, 2023 Author Share Posted May 17, 2023 7 minutes ago, mboxler said: What ohm reading do you get on the drivers in the speaker with the new crossover? it goes from 1.2 ohms at first and down to 0.0.4 Quote Link to comment Share on other sites More sharing options...
senzlez2 Posted May 17, 2023 Author Share Posted May 17, 2023 with the same measurement ohms and 200 settings on multimeter as I measured the other drivers Quote Link to comment Share on other sites More sharing options...
winglet Posted May 17, 2023 Share Posted May 17, 2023 3 minutes ago, senzlez2 said: it goes from 1.2 ohms at first and down to 0.0.4 All 4 drivers measure like this? Quote Link to comment Share on other sites More sharing options...
senzlez2 Posted May 17, 2023 Author Share Posted May 17, 2023 5 minutes ago, winglet said: All 4 drivers measure like this? yess it fluctuates but it settles at 0.0.4 Quote Link to comment Share on other sites More sharing options...
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