1. I have a friend who says DIY speakers CAN'T compete. I mean that guy rocks a B&W CM9 S1. Powered with a 200 watt Stereo Amp. I have heard his setup. Super good. But also expensive side of things.
He is inexperienced.
With diy loudspeakers there are some of the very best, and many that ar enot so good.
Someone who knows what they are doing, or is just executing an already done design, can easily make a loudspeaker that is sonically competitive with those on the shops that cost many, many times more money.
Also keep in mind that all loudspeakers have a huge set of compromises. The choice of those is the art in loudspeaker design. With different people, different rooms, different amps & front-ends, there is considerable room to need those kinds of compromises best fit your needs and budgets.
Just looking at Danny’s rich set of offerings is selling the niche short. They may satisfy your particualr needs, but you should scoot over to diyAudio.com where you can find out a whole lot more on loudspeakers you build for yourself. From 1-way to many more ways. Cheap to expensive. And a good selection of helpful, knowledgeable prople who can helpyou sort thru the zillions of potential options.
dave