my thoughts..
The 7 is no longer available only the improved MK2
I had a shot at last pair of 7 and passed as I wanted Richards best even if the differences are relatively small. Richard is a fanatical and frugal Engineer and mk2 means something. Not only is the acoustic lense chaged with better tweeter/ mid alignment but the subwoofer driver has been tweaked. I was able to hear 7's in 4 distinct environments around the country - including a generous offer to hear Richards personal setup - this before mk2 existed. I have heard them with as few as 200 wpc. without knowing your room tastes, etc..I would not feel comfotable saying what the minimum amp would be - certainly whatever you are using for the 5a Carbons would be up to 7's...I ran my 5a with a Mac240 for a while :-)
my tastes do not run to loud - as I write this I have Alison Krauss on at 17 on the ref5 se volume Ayre amp loafing..music is about 70 db ( using Audiotools rta)
the new vs used track has a couple of factors
new qualifies for future upgrade path. You get to pick your paint color also.
hopefully this helps
Jim
The 7 is no longer available only the improved MK2
I had a shot at last pair of 7 and passed as I wanted Richards best even if the differences are relatively small. Richard is a fanatical and frugal Engineer and mk2 means something. Not only is the acoustic lense chaged with better tweeter/ mid alignment but the subwoofer driver has been tweaked. I was able to hear 7's in 4 distinct environments around the country - including a generous offer to hear Richards personal setup - this before mk2 existed. I have heard them with as few as 200 wpc. without knowing your room tastes, etc..I would not feel comfotable saying what the minimum amp would be - certainly whatever you are using for the 5a Carbons would be up to 7's...I ran my 5a with a Mac240 for a while :-)
my tastes do not run to loud - as I write this I have Alison Krauss on at 17 on the ref5 se volume Ayre amp loafing..music is about 70 db ( using Audiotools rta)
the new vs used track has a couple of factors
new qualifies for future upgrade path. You get to pick your paint color also.
hopefully this helps
Jim