This is turning into a really interesting brain-storming idea thread. 

What led me down this path was that I made an impulse buy of a brand new pair of CSS-Audio LD25X tweeters. The first 40 pairs were available at a nice discount to get, so I jumped on a pair without much thought on what I wanted in a pair of speakers. Once they were in my hot little hands, I began thinking about what kind of speakers I wanted. I quickly decided that I wanted a nice midrange driver and an 8" to 10" woofer. For cabinets, I'm pretty certain I want stand-mounted speakers - perhaps 24 to 26" tall by 9" to 12" wide. Depth - thanks to my TV cabinet's depth - could be as much as 22".

Before Nick began this thread about Carreras, I had already tentatively tightened my midrange driver choices to a Satori mid, a Revelator mid, and an AT mid. I'm still fishing for a woofer.

Now, I've never heard the LD25X tweeter. I've heard its little brother - the 22mm driver, but I haven't compared its sound to other tweeters. I don't know how committed I am to using the LD25X for this idea. I know for a fact that I like the tweeter in the Fritz LS/5-R speakers. It's the same one that Fritz uses in his Rev 7 SE speakers. This led me to wonder if I could get Fritz (or another speaker designer) to modify a pair of Carreras or Rev 7 SEs by adding a big woofer to make a three-way. [I know. Call Fritz to chat with him. I eventually will, but not from 5000 miles away.]

That's all for the moment. My wife and I are departing ATL for Taiwan in a few hours (with a 6-hour wait in SeaTac) for our connecting flight to Taiwan. I don't have adequate time to fully explain my thinking right now, so I'll try to follow up later - perhaps while we're languishing at SeaTac.

Michael

Not comparing Fritz to Klaus as I am aware that the crossover designs are completely different.  My point was that in a cabinet 24" taller and a similar baffle size that Klaus is using two of the same driver to get into the mid-20's.  Whether it would be easier for Fritz to do with both drivers passive or one active would be a decision for him to make.  Whatever would get Michael the bass response he needs along with the WAF. Even though the Carrera's have been replaced in the FR system with the Nola KO's which do mid 20's on their own the two Rythmik subs are still in play with the crossover reduced. The KO's are using two 7" SEAS drivers in separate compartments with the mid's and tweeters open baffle.

Michael

I wonder what it would do if he added 24-26" to the cabinet height sealed from the passive components with another powered Revelator driver though I don't think he can go much larger as there is just under an inch on either side of the current driver.  Klaus is using two of the same driver in the Liquid with the second one on the bottom in a separate compartment and getting mid 20's response out of them.  I was getting -6 db at 25 hz from the Lorelei's in the larger cabinet with just one.  The Liquid's front baffle is only 1" larger and that includes those rolled edges. He could use one of the Hypex modules like Clayton is using in the new X series. Might be worth asking to see what he prices it out at.  Might eliminate adding anymore subs other than what you have with your F12 crossed over at around 40 hz just for the presence factor.

Fritz's crossover method doesn't work with 3 ways.

An MTM is the limit to adding drivers really.

Active bass can be added. I'm curious if it's possible to do this kind of crossover with larger woofers like 12's or 15's and a compression driver... that would be interesting. That would be potentially worth paying to have developed.

That helps explain why he sells two-ways!

Thank you.

Michael

If Fritz put two Revelator woofers and the Be tweeter in a floor standing cabinet you might get the speaker that fits the bill.  Would be similar to what Klaus did when he went from the Kismet monitor to the Liquid.