Do you think you need a subwoofer?

The aerial sw-12 takes a correct approach. While not cheap (approximately $10k)offers a variety of slopes up to 24 db/octave. It is flat to at least 2Hz and allows a maximum cut in of 100Hz. Thus it will mate well with mini-monitors.It also offers a variety of beautiful finishes for those who are turned off by black cubes. If you like black, you can get that too.
gregadd

Dear Gregadd: Yes the Aerial is very good option. Its price was a little to much for me but its quality performance is really good.

MK the designer/owner of Aerial was/is the one that made the design of my ADS main speakers.

Regards and enjoy the music.
Raul.

Raul---What is your view of the method used in the Legacy Focus: Including separate subwoofer drivers in the same box as the tweeter, midrange and regular woofers, and bi-amping with a crossover.

In this way, (i) the stress of reproducing low bass sound is removed from the woofers, and (ii) separate amplification is provided for the subwoofers.

In this way, separation is achieved without the cost of an additional box.

Is there any downside to this approach?

Dear Jim: THis Legay is a very nice approach/design that address the IMD subject between other things.

Downside?, well nothing is perfect: if I was Legacy I will make those bass drivers self powered with a dedicate amplifier that match exactly the drivers needs and take care in deep about isolation between those bass drivers and the whole speaker.

I never have the opportunity to hear the speaker but seems very good and has very good reviews.

Regards and enjoy the music.
Raul.

Dear Jim: Other factor that could help to that Legacy speakers is to separate the subs from the main box.
Anyway it looks like a very good speaker.

regards and enjoy the music.
Raul.