I have been intermittently involved in DIY audio projects for 10 years. Last year, after an extended break, I decided to get a reference system back together. My last big project was a 3-way speaker with analog active crossovers and triamps, all of my own design. Unfortunately, I cannibalized them during following little projects.

My previous 3-way active speakers were pretty good, but had some crossover flaws. So the next project decision was to study existing passive designs, build...