High Current SS amps with input impedance = 200K

Al,
c
Thanks for the details.

I can say with confidence that the sp16 sounds very balanced, natural and lively with the MF a3CR I'm using (31K input impedance spec).

There is a larger (>200 w/ch)MF A308CR amp up for sale by a local Agoner. I think the impedance specs are the same as the A3CR but need to confirm. Since I like the current sound an would be happy with more of it, that might be something for me to consider again now that I have a handle on the impedance issues.

Glad you found that, Almarg. I spent a bit of time Googling it myself without success.

Atkinson states the SP16 should not be used with amplifiers having input impedance "much below 10k Ohm".

So, yes the SP16 appears to work well with most SS amps.

If that's the case, Mapman, you might consider one of the McCormack amps...like a DNA-2 Deluxe or a DNA-500. Check with Foster_9 about his experience using a DNA-500 with his Ohm loudspeakers. I believe he's using one with a VTL linestage.

Looks like a good call on the A308CR, Mapman.

New Krell EVO amps do have input impedance of 200 Kohm on balanced inputs. So if that is what you are looking for ...

Several newer class D amps have imput impedances in the 40K Ohms, including my JRDG 312. . . but the highest may be the Bel canto Ref 1000 Mk.2. It has raised its input impedance to 200K Ohms from the previous version, which was a respectable 20K Ohms already. R1000 Mk.2 handle my 6Ohms wabbly load Mahlers without any difficulties. Guido