I was looking at purchasing a PPI A404 to power my speakers. I have a set of boston acoustics pro 60's in the front and just some rear fill.
I want to know if the amp will be powerful enough for the the Boston's? They are 3 ohm so I am assuming around 75W RMS per component - note they are trying to keep up with 2 idmax's running around 750W RMS each.
Also I hear the art series are full range amplifiers.... what are they like producing low notes in 6.5 inch speakers? I am wondering if something with a crossover would be better as I thought it would be generally better to cut off frequencies around 80hz?
The crossover isn't for the amp, it's for the speakers. Like Isaac said above, that amp will handle any audible frequency beautifully, it's a question of whether the component speakers can handle that low of a frequency without being driven into overexcursion. That being said, most component speakers do better to be crossed around 80-100hz with a minimum 12db/oct slope. These crossovers are built into most modern head units, though.