Rod...I've just cut and stained lumber with a jig saw when I needed interior trim rings. Used teak on boats for the same. Give's a nice look when complete.
Anyway...your lack of use of the B speaker terminal explains the success with 4 ohms.
I was kinda thinking A for "living room" fronts...surround for living room home theater surround and "B" for bedroom when I posted earlier. This would present a real problem for your Sony or most reasonably priced receivers.
I'm getting the 280DS and thinking that I'll use what they give me for video sound and get something entirely different for audio.
I'm sure they used pretty much the same setup for all the non XL coaches but obviously...fit & placement would be different.
What do you think of this for a coach STRICTLY for stereo audio acknowledging that imaging will suck no matter what I do but at least getting quality sound....
Samsung DA-E750 Powered speaker system with iPhone┬«/AndroidÖ dock, Bluetooth┬« and AirPlay┬« wireless streaming at Crutchfield.com
Marked down to $599 elsewhere...I am lusting for it.
NAD... I remember when they first came out with transistor audiophile sound for a reasonable price...the 3020 was a classic...and they're still doing it!