When I first viewed the test graph I was surprised, and my reaction was "If this is good I would hate to see what bad looks like". The graph looks very ragged to me, but on closer inspection it isn't as bad as it looks. Using 87dB as a reference level the response is +/- 3dB from 42hz to over 20khz, with the exception of a broad peak between 400hz and 1.2khz that exceeds the + 3dB. This peak is centered at 670hz, where the response is +7dB. To my ears the peak is audible but not objectionable.

I had enjoyed the ART Arrays so much that I built a second pair after sending Wayne the prototypes. My pair had the 2nd order woofer crossover, so I quickly disconnected the shunt cap an the zoebel and listened with the 1st order version that Wayne prefers. The second order woofer xover results in a 6dB null centered at 2.5khz, an area where the 1st order response is flat on. Much to my surprise, I prefer the 2nd order woofer crossover. To my ears the 2nd order, with its "BBC dip" centered at 2.5khz sounds smoother, with massed strings sounding less aggressive, bad recordings less fatiguing, and female voices less forward. True, with the 1st order Norah Jones is actually whispering "come away with me" directly into my ear, but I already have a wife to do that with far fewer complictions. To each his own :)

• ART Array Test Results

ART Array Frequency Response at 2.83v/1M

Here's a verbal description of the crossover:

Tweeter crossover: A 10uF cap followed by a 16 ohm shunt resistor across the tweeter.

Woofer crossover: A 1.2mH inductor followed by a 4.7uF shunt cap, plus a zoebel consisting of a 12 ohm resistor and 4.7uF cap in series with the resistor.

Just one clarification though: The measured results are for a speaker with 1st order on both the tweeter and the woofer array. The tweeter has a 10uF cap followed by a 16 ohm shunt resistor across the tweeter. The woofer array has just a series 1.2mH inductor. I'll send a drawing of the crossover you've described too, but measurements of that configuration weren't as good as the pure first-order crossover.