Kinki Studio EX-M1 200wpc Integrated Amplifier

Pts, the line-level inputs of powered subs generally have low impedances, typically in the area of 5K to 20K.  Before proceeding down this course, it would be prudent to inquire as to what the output impedance of these pre-outs would be, and if Alvin would recommend them as being suitable for driving such low impedances.

Good luck.  Regards,
-- Al 

If your subs have speaker level inputs that would seem to be a better option than "modifying" a working design.  

Thanks for the tip, Al.

jackd:
My Rythmik L12 subs have their own internal power amp, and only accept RCA inputs. Unless I'm missing something obvious, they always have to be run directly from a preamp.

If you are using L12's you are correct that RCA input is your only option.  I am using F12's in both of my systems so I have the option to go either way. 

Kinki EX-B7 mono amplifier review now posted in full at 6Moons:

http://www.6moons.com/audioreviews2/kinki4/1.html