[Davey]

The 12uF capacitor is a non-polar electrolytic shunt on the woofer network.  The newer MMG crossover discarded that capacitor and utilized a first-order electrical network on both sections.  I like the newer design myself.....with the modified values I mentioned.

The SMGa design and capacitorless tweeter network are not appropriate for the MMG speakers......in my opinion.

Cheers,

Dave.

[kappa546]

So with your values you are slightly narrowing the crossover band, do you find it's just slightly more forward than stock? What do you like about that crossover? I did some reading about the benefits of first order networks and about crossover mods for the mmgs and I'm inclined to agree with your preference in principle at least.

[Davey]

My subjective opinion is meaningless.    Give that crossover a try and see what you think.

Cheers,

Dave.

[cpalcott]

Still trying out different crossover configs on my MMGs. Wanted to try out this hybrid MG12/MMG crossover I found here on the circle (sorry--cant remember who ).Does this schematic look correct?

[Davey]

In my opinion the 30uF capacitor on the tweeter is way too big.

What is it you're attempting to do here?  Just try out various component combinations to see how they sound?
If experimentation is your objective, I would suggest to eliminate the entire passive crossover, bi-amp the system with a DSP-crossover, and you can then try hundreds of iterations with just a few mouse clicks.

Cheers,

Dave.

[cpalcott]

I'm basing this off an old post by inmate lne937s. See below: I'm not sure how accurate it is, just thought it would be interesting to try. But I wanted to make sure I was hooking it up right

"Lowpass:
2.5 mH Erse with 33uF shunt- The rationale is: the woofer panel is ~5 ohms on the MMG vs ~4ohms on the MG12. The MG12 lowpass approximates a bessel filter, so I maintained this alignment, but adjusted for impedance (including the lower impedance of the Erse coil). Since the panel is narrower on the MMG, the frequency response at listening position will be closer to the tweeter- so I raised the crossover frequency. I went with the Erse based on some of the experiences I had building a few other crossovers. While I wouldn't use it with a much higher crossover point, I believe the low DCR makes a big difference in bass frequencies.

Highpass:
30uF ASC 386 with Roederstien bypass- I ended up with this size because it was the size the capacitor I liked the most came in. I tried adding smaller value caps to bring the value up a little, but I think this sounds better. If you think of the things that impact frequency response of a driver (surface area, mass, compliance of the suspension, etc.), perhaps the MMG tweeter doesn't go as low as the MG12 due to the fact that it is glued to a smaller sheet of mylar and may be tensioned differently?- but that is conjecture. I ended up trying the ASC oil-filled industrial caps based on some reviews I've seen. I really liked the way they sounded compared to some mid-priced caps I've tried, so I'm sticking with them for now. In terms of bypass, I did a lot of swapping in and out: some sounded better, some sounded worse. I went with this one because I think it sounds better. I still want to try a few PIO and see if I like them more."