senzlez2 Posted May 18, 2023 Author Share Posted May 18, 2023 27 minutes ago, mboxler said: Rats! In my first post of this thread I said "I assume the bottom of the picture is input?". Is that not true? I'll rotate it and look again. On my first cup of coffee, but I'll gradually wake up. the bottom of the picture is the connection for drivers, top is the connection for terminals Quote Link to comment Share on other sites More sharing options...
winglet Posted May 18, 2023 Share Posted May 18, 2023 22 minutes ago, senzlez2 said: the bottom of the picture is the connection for drivers, top is the connection for terminals I’ll let @mboxler confirm, but that 3.6mh inductor at the top (input) should not be connected to ground. One side connected to positive, and the other should connect to the 75uf cap only. Cap to 8.2 resister, and then to ground. Quote Link to comment Share on other sites More sharing options...
mboxler Posted May 18, 2023 Share Posted May 18, 2023 I'm very sorry. Once I rotated the picture things got clearer. I've drawn how one way to wire the circuit. It follows the schematic in component order, although it could be wired other ways. I'll try to write out what needs to be done. Red is the positive path, Blue is the negative path. The red circles mean no connection. Woofer in + to 1.3mh in. 1.3mh out to Woofer out + AND 30uh in AND 8.2 ohm resistor in. 30uh out to ground. 8.2 ohm resistor out to 75uf in. 75uf out to 3.6mh in. 3.6mh out to ground. Does that look right @winglet? Still on my now cold first cup of coffee. EDIT: I rotated the picture 90 degrees. Left is input right is output. Quote Link to comment Share on other sites More sharing options...
winglet Posted May 18, 2023 Share Posted May 18, 2023 Oh holy hell.. now I need more coffee.. haha 1 Quote Link to comment Share on other sites More sharing options...
mboxler Posted May 18, 2023 Share Posted May 18, 2023 1 minute ago, winglet said: Oh holy hell.. now I need more coffee.. haha Just don't let it go cold! Quote Link to comment Share on other sites More sharing options...
Deang Posted May 18, 2023 Share Posted May 18, 2023 You guys have a lot of patience, and good eyes too! 1 Quote Link to comment Share on other sites More sharing options...
winglet Posted May 18, 2023 Share Posted May 18, 2023 @mboxler Mike. Take another look at his very first picture of the crossover. If he removes the amp neg in connection to the 3.6mf inductor and instead connects it directly to the speaker out neg screw at the bottom, I think it fixes it. That inductor is shorting the amp to ground Explains the .4ohm reading he’s getting when he connects the multimeter to the speaker input terminals on the speaker with the installed new crossover Quote Link to comment Share on other sites More sharing options...
mboxler Posted May 18, 2023 Share Posted May 18, 2023 27 minutes ago, winglet said: @mboxler Mike. Take another look at his very first picture of the crossover. If he removes the amp neg in connection to the 3.6mf inductor and instead connects it directly to the speaker out neg screw at the bottom, I think it fixes it. That inductor is shorting the amp to ground Explains the .4ohm reading he’s getting when he connects the multimeter to the speaker input terminals on the speaker with the installed new crossover I agree, but I think there are other issues. Looks like the amplifier is directly connected to the 30uf capacitor. I'll try another approach. Hopefully clearer??? Connect Woofer IN- to Woofer OUT- (new black wire). Connect Woofer IN+ to A (new red wire). Connect B to Woofer OUT +. Connect B to C. Connect C to E. Connect D to GROUND. Connect F to G. Connect H to I. Connect J to GROUND. Quote Link to comment Share on other sites More sharing options...
winglet Posted May 18, 2023 Share Posted May 18, 2023 Add the ground wire as you showed. On the + side, the 30uf cap input needs to be moved to after the 1.3uf inductor and then to ground. D to B, and C to the ground woofer out screw. His existing + wire to the 1.4uf in (A) looks like it is the same as your added red wire (i think we’re saying the same thing, just connecting thru the 30uf cap in different directions) Quote Link to comment Share on other sites More sharing options...
mboxler Posted May 18, 2023 Share Posted May 18, 2023 15 minutes ago, winglet said: On the + side, the 30uf cap input needs to be moved to after the 1.3uf inductor and then to ground. D to B, and B to the ground woofer out screw. In your case, shouldn't he connect C to the ground woofer out screw? Quote Link to comment Share on other sites More sharing options...
winglet Posted May 18, 2023 Share Posted May 18, 2023 1 hour ago, mboxler said: In your case, shouldn't he connect C to the ground woofer out screw? Yes. Corrected @mboxler Can you rewrite your flow of connections from left to right instead. Input to output. I think you have a mistake in there. The 3.6mh inductor (J) shouldn’t go to ground. It goes + wire (after 1.3mf inductor) -> 3.6 -> 75uf -> 8.2r -> ground (woofer neg output) That’s the order on the schematic. I think you’re going in the opposite direction with those 3 components. Does the order matter? Quote Link to comment Share on other sites More sharing options...
mboxler Posted May 18, 2023 Share Posted May 18, 2023 @senzlez2, does the new layout make sense? As @wingletpointed out, the inductor was the biggest problem. The capacitor issue would have just made it sound different. If my alphabet system works, I'll tag the tweeter circuit as I (we) see it should be just to be sure it's okay. We all started out where you are. Don't be discouraged, it's a learning experience. Mike Quote Link to comment Share on other sites More sharing options...
babadono Posted May 18, 2023 Share Posted May 18, 2023 Where does OP live? @senzlez2 ? Somebody go over and help this guy. There is no reason a home brewed replacement crossover should not work. Quote Link to comment Share on other sites More sharing options...
senzlez2 Posted May 18, 2023 Author Share Posted May 18, 2023 42 minutes ago, mboxler said: @senzlez2, does the new layout make sense? As @wingletpointed out, the inductor was the biggest problem. The capacitor issue would have just made it sound different. If my alphabet system works, I'll tag the tweeter circuit as I (we) see it should be just to be sure it's okay. We all started out where you are. Don't be discouraged, it's a learning experience. Mike yes im about to follow your layout, on both crossovers, I will report back thanks for the help so far Quote Link to comment Share on other sites More sharing options...
babadono Posted May 18, 2023 Share Posted May 18, 2023 If we could just do everything without wires Quote Link to comment Share on other sites More sharing options...
mboxler Posted May 18, 2023 Share Posted May 18, 2023 1 minute ago, babadono said: If we could just do everything without wires Where's Nikola Tesla when we really need him? 1 Quote Link to comment Share on other sites More sharing options...
babadono Posted May 18, 2023 Share Posted May 18, 2023 I count 12 electrical components and some wire...You will git 'er done...this ain't rocket science Quote Link to comment Share on other sites More sharing options...
Deang Posted May 18, 2023 Share Posted May 18, 2023 And the holes. Don’t forget about the holes. Quote Link to comment Share on other sites More sharing options...
mboxler Posted May 18, 2023 Share Posted May 18, 2023 Okay...now I'm confused again. In my last picture the words OUT are on the left side, but there are three wires on the right side that I assumed were to connect to the three woofers. Which is it???? Quote Link to comment Share on other sites More sharing options...
winglet Posted May 18, 2023 Share Posted May 18, 2023 I'm thinking the tweeter and woofer sections are wired in opposite directions. In @mboxler pic, the woofer section flows left to right, but the tweeter section appears to be wired right to left. Quote Link to comment Share on other sites More sharing options...
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