I've heard both and prefer the CHP-70, but I'm sure others will prefer the CHR-70. I found the CHP to be more "rounded" and balanced (both in BPA's Needle Deluxe), while the CHR-70 sounded just a little bit "metallic" in my ears. The Alpair 7 and 10 did not sound "metallic" to my ears -- just as a comparison. I'd take the CHP-70 or the Alpairs
as close as I've yet been able to hear to the official CHP70 would be the CSS labeled EL70, which I personally prefer to the CHR70 in at least 3 or 4 designs to date
the Alpair 7 and 12 (latest gen) are pretty special - certainly not "metallic" [...], but to me still lack some of the "warmth" or "character" of the smaller paper cone -
You mention 3 to 4 designs you've heard the CHP70's in that you liked... may I ask what those designs were? If there are links or info on any of them? I am still trying to figure out what the best build up for these would be. Any reply greatly appreciated.