One dedicated circuit for each mono block?

@arcticdeth 

Cashflow is of course a relative thing but, looking at the cost of big Class A amps new today, the KRS200s are great value.  There is a fairly ready supply at between £6k - £12k.  They are nearly 35 years old now so expect service issues.  I bought mine in the early 90s from a Krell dealer ex-dem.  I paid £7.5k then.  About 12 years ago I had them checked over, serviced and fully re-capped.  That cost £3.5k then.  But for £12k today expect them serviced and re-capped.

I reckon that's value and they sound great against today's big designs, many of which have been toned down for the green lobby and don't run in pure Class A right up to the top.  And don't they look the business!!

@ditusa  you have given me something else to ruminate & worry about.

 I own a house built in the ’60s and when I bought it it did have the old style fuse box and there is one circuit with a few outlets WITHOUT the 3rd wire (ground). Is there a good chance there is some knob & spool going on here, and would I be able to see that by pulling one of those outlets and would I be able to identify it from what wire I could see from the removed outlet?

@yesiam_a_pirate 

One dedicated breaker, #10x4 line, one leg to a dedicated 9’ copper earth ground stake and the other end to the amp chassis. 

Hopefully that dedicated 9' copper earth ground stake is tied to the other load center ground rod(s). Ground rods only exist for lightning protection, and you should never have any that are not tied or connected to each other. 

@immatthewj

Is there a good chance there is some knob & spool going on here

...highly doubtful if you say your house was built in the 60’s. Most times the ground was the conduit or metal clad cable running between the fuse box and outlets. After many years of high humidity or dirty environments, those grounds can decay (no longer being of low resistance), as the conduit and metal clad cable connections start getting dirty, begin loosening, or begin oxidizing.

Okay, thanks @dpop  I am thinking I should pull one of those old outlets without the third wire and see what's going on back there.  We are not using them for much, some lamps, cordless phone, clock, etc, but probably enough to be a fire hazard?