Anyone have/ordered the Job 225?

@grannyring...
what is the sensitivity of your speakers and the gain of the preamp you are using?  this matters much with the job's 35db of gain and 0.75V sensitivity.  i found that i also had a hiss with my 94db speakers and modwright preamp until i bled off quite a bit of gain at the inputs to the job.  after doing so, the noise floor was back to where i expected - ie, no noise whatsoever.

that said, my amp gets warm, but never too hot to rest my hand upon, even after several hours of use, so it's possible there may be more going on with your amp.

@grannyring 
i haven't used the Rothwells personally but have heard that they aren't the last word in transparency.  I can say that the LDR pre in my application was completely transparent, and enabled me to perfectly dial in the amount of attenuation needed, unlike the fixed in line units, such as the Rothwell.

@grannyring...i use an LDR preamp effectively as an attenuator at the Job inputs. the LDR piece is set at a specific level and simply left there. input switching and system gain adjustments in use are still handled by my Modwright preamp. rick schultz made this suggestion when i contacted him to build me a set of his evs ultimate attenuators. works perfectly - DRAMATICALLY reduced the noise floor of my system and enabled me to dial in the system gain such that the VC in my preamp now offers very fine control of overall system gain.

i agree that the 225 is a fantastic sounding amp, but does require some care in implementation for the gain and sensitivity.  once worked out, it's truly excellent.