Converting a 2-way to a 3-way

[Toaster]

Ah- a 'true' three-way design rather than a two-way plus subwoofer/s is a different proposition entirely. It would be possible to use the SEAS L26ROY (rather than the lower sensitivity '4' version) as the woofer without getting into a four-way system. Choice for midrange and tweeter drivers then gets very broad! As always, there are trade-offs, particularly in terms of size and cost. A true three-way plus subs is a great way to go, but likely to be fairly big and expensive. One very important criteria is how loud you need the system to be at your listening position, which dictates the system's size, all else, particularly bass extension, being equal. I would take some time to look around the 'net at various kit vendors and well documented DIY designs to see what is available before jumping in. Masses of useful stuff on this forum of course! These days there are an enormous number of options available. Two of the most interesting companies to check out are GR Research and Selah Audio, in my experience. Have fun!

[Jay]

For some of us, analog active crossover is not an option. But knowing that 3-way has many advantage over 2-way, and that 3-way passive is difficult, 3-way active is then acceptable.

May be 3-way is the only way to justify an analog active crossover.

Most people love the sound anyway.

Digital crossover is another better option.