It has been about 5 months since I built my first DIY speakers, a pair of AR.coms. I keep them in my bedroom as my 2nd system, but in fact they have become my preferred system for listening to 2-channel music. I know, it may be due to the new toy phenomenom, or differences in the receivers I use, or the room itself, but currently, they are my favorites.

I was wondering what to build next in my newly acquired hobby of DIY speaker building. The AR.com components were bought as a kit from Madisound along with their preassembled crossovers. The enclosure was bought from Speaker City. So I am still pretty inexperienced. I’ve now begun to absorb Vance Dickason’s book, and with a new router and other tools have begun to build boxes out of scrap wood and otherwise make a lot of sawdust.

Has anyone tried to use the same Peerless drivers (850122 woofer and 812687 tweeter) in an MTM design? I’ve found other MTM designs on the internet using several different drivers, from Vifa, Dayton, or Seas, but nothing for Peerless. In my innocence, I think that box volume and port size for such a speaker should be pretty straight forward. But what about the crossover? I’ve read enough to understand that crossover design is a critical step, and requires considerable trial and error before it is really good. I don’t have any test equipment, and would prefer to use a tested crossover design, like I did in the AR.coms.

Is there any reason why these Peerless drivers should not be used in an MTM design?

Can I directly modify the Ed Frias designed crossover for the 2-way into an MTM crossover, or is it better to start from scratch?