Active crossover filter DIY

[@frash5230]

Thanks for this great video! Very well shot and clearly commented. Mentioning all the daily life errors we all do makes it even more likable. Sharing the schematics etc. is a very kind, too!

[@MeeBilt]

Hey, thanks a lot!

[@1dolar1note1]

Thanks to the recommendations this popped up at right moment, ill need this type of circuitry when planing to build a PA sub. That'll come in handy.

[@Alex-rg1rz]

i am always amazed by your build, the enclosure is really cool 👍

[@MeeBilt]

Thanks a lot!

[@leiferickson3183]

I like this video because I have thought of doing something similar for my synth setup. Happy New Year!

[@MeeBilt]

Thanks and happy new year!

[@mathewstorey7545]

Very nice job. I would be interested to learn about your PCB layout process for circuits like this.

[@MeeBilt]

I have a series of episodes called "909 Rimshot" on my channel that explains my workflow. It's for a Eurorack module, but I basically used the same method for this design. In order to fit the holes for connectors and pots I used 3D-models of the PCBs that I exported from KiCad into FreeCad where I checked the aligment and dimensions. I hope this answers your question

[@danieleden1856]

Looks awesome ! would be keen to get some measurements from your design to get an idea on how it performs (THD/filter response etc)

[@MeeBilt]

Unfortunately I don't have access to an audioanalyser, but my plan is to buy one. I'm also curious how the circuit performs and if I can make any improvements to it.

[@impuls60]

Doesnt such a filter introduce a time delay so the sub will always lagg behind the front speakers? I've never heard good transient bass notes sound right without delay on the fronts to match the slowness from filter and heavy cone in the subwoofer.. In regular speakers you often see a 1. order filter that introduce a minimal phase delay of 90 degree. I have multiple subs myself but without delay on the fronts, it doesnt sound right nomatter how I adjust the dsp on the subs. A friend of mine bought a Wiim amp with delay on the fronts, and for real that made the mono sub integrate and sound SO much better. I feel this issue is a truly overlooked issue in 2.1 setups.

[@MeeBilt]

This is not a problem that I have experienced. But I guess that it would be possible to make an in-situ tuning in the preferred listening position and adjust groupdelay of the front speakers to match the subwoofer response.

[@Jonathan_Doe_]

I think the point of active crossovers is you can design them to avoid the phase shift of a purely passive crossover. If you’re really bothered about time and phase alignment, get a multi channel amp with DSP, then you can time align based on where the drivers are positioned in relation to your listening position.

[@Manu2126]

hello sir, amazing build, could you help me out with how you have aligned the inputs and outputs with the holes on the front and back panel?

[@MeeBilt]

Thanks a lot! I did it like this: 1) I took dimensions from the datasheets for the components to locate all the holes 2) after that I made the design of the main PCB in KiCad placing out the components on the PCB the way I wanted them. In some cases I had to download 3D-models of the components from the suppliers and add them to my component library. 3) I exported the PCB design as an STEP-file 4) then I imported the design into Freecad and designed the enclosure around the PCB 3D-model 5) next step was to design the outline of the front- and back-panels in KiCad. 6) I used the top surface of the main PCB as the reference plane and then I placed all the holes for the connectors and pots using the measurements from step 1) above. 7) final step was to verify the location by exporting STEP files for the panels and bring them into FreeCad so I could check that everything matched up before I sent the PCBs for manufacturing

[@Manu2126]

@@MeeBilt wow amazing, this would help me so much! Thank you so much sir. in future if you have the time and motivation could you make a video of you explaining the process of you doing the mechanical work for your products, such as mechanical design decisions and techniques. Thank you once again!