Here's a quick report from using them in system #2 between the Yamaha and the Kenwood, they're just a tad brighter than the Rat Shack IC's the AR's are considered to be rolled off in the highs, so that's a welcome improvement
the interesting thing is the lows, again the little AR's aren't subs, but ol' Roy Allison sure knew how to get some bass out of a slightly larger than a shoebox speaker! I got lot's of serious bass compared to the Rat Shack's, in fact, the whole sonic picture opened up nicely, the Moog synth on Heart's "Song of the Archer" was vibrating the thick adobe walls in this big old house, I felt it in another room. One of the clocks in the bathroom came off the peg. That had not happened before

This is from an LP to metal cassette recording played on a mid-line Luxman deck.
So I tried the IC's between the Luxman deck and the Yamaha, everything collasped sound wise

mostly with the lows, they didn't disappear, the punch was gone...
When I just used one set between the Luxman and the Yamaha and the other from the Yamaha to the Kenwood (same channel) everything was extremely vibrant again, though hard to really say playing one channel of a stereo recording. I'll be moving the IC's into system #3 next, I have to wait to use the main rig as the woofer in one of the M-L's is brand new and needs to break in still. I can't wait for that -*test*-('"), the 'Logans are so reveiling in their own special way.
So, I'll say I got some good synergy/results, and I likey
Your humble -*test*-('") pilot,
Craig