simple active crossover

[planet10]

'cept I'm building a Pass SLOB and a MoFo, not an M2.

Oops, typing too fast :^)

dave

 

[adason]

Wow, that's beautiful, thanks!
Made some edits.

 

[312elements]

Adason, do you have a picture if the insides of the completed unit you’d be willing to share? Very cool project!

 

[adason]

your wish is my command!

this is simple active crossover in the main system, small black box with two knobs
inside is always messy

 

[adason]

this is second simple active crossover, in the guest room system(s)
nice aluminium box with chicken head knob...

 

[adason]

and this one is in my messy diy room
pure foam board!
btw, I always use external power supply of high quality

 

[adason]

and two more finished and tested, but waiting for suitable box, plus some new board I etched
these two will go to other systems, I have too many...

 

[adason]

matching the jfets...

 

[312elements]

Thanks so much for posting these. I really appreciate the visual.

 

[adason]

here is cleaned up picture, including the formula, if anyone desires different frequency
thanks to dave for the drawing

 

[Nelson Pass]

Select your Jfets carefully and you can eliminate the pots.

🙂

 

[adason]

Absolutely true!
Furthermore, the outputs are capacitor coupled. No DC on the output.

 

[joensd]

In the schematic: The resistors at the input have odd values. 10k seems a little high while 100R to GND is definitely too few Ohms.
Maybe these got mixed up.

 

[adason]

its just meant to simulate volume pot
use what you want

 

[adason]

imagine its just volume pot at its 1/10th of the input signal...

 

[adason]

I cleaned up the schematics to avoid confusion.

 

[Rewind]

I wanted to try PLLXO, but chickened out after reading about its disadvantages and now I am building the 6-24 active crossover, in an attempt to get rid of the typical minidsp sound (yuck!) and reach the ultimate in ethereal clarity, etc.
Any chance these will be available for the common uneducated DIY user soon? I am having trouble understanding what goes where in the schematic. We almost have the same crossover point. Right now I am at 200Hz, I just need to modify the midbass horn a little to get down to 150Hz. 🙂

 

[adason]

Not from me. I made way too many for me and my friends already. But its certainly good idea to create pcb for anyone interested. Its the most transparent active crossover i know.
Flexible for any desired frequency too.

 

[Rewind]

Fast answer!

Yes, I would be the first to buy. 🙂

 

[Rewind]

Not very impressive, but this is as far I got looking at your schematic.