srafi,
Is this what the back of each of your mono's look like?
http://www.highperformancestereo.com/krell-krs200-monos.html
srafi said:
"Due to some electric issue one XLR channel on the pre has stopped working though the RCA outputs work fine. The way my pre and power are wired at the moment is that the pre XLR out goes into a convertor into the back of the power."
Why did it need a converter? Don't the amps have balanced input jacks?
Have you tried hooking the preamp to the amps using single ended RCA interconnects? (You will need to install the shorting pins on the XLR input jacks)
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srafi said:
"Also along the way due to the same electrical issue one of the monoblocks has now become direct in that the power button on the front of the amp does not work. The amp has to be shut of from the back main power button. When i do shut it from the back the amp will play music distorted for a few seconds as oppossed to the other one which shuts off when either the front or back power buttons are used."
Mute the preamp first before turning off the amps. If no mute turn the volume all the way down. Or just stop playing the front end source.
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Quote from Link below:
"Description of On/Off and Standby Operation
When powering up any system, amplifiers should always be turned on last and
turned off first.
1. Locate the power breaker on the rear panel of the amplifier. Move the switch
to the ON position. The power LED, labeled P, will illuminate on the from
panel. This engages the input circuitry and sets the amplifier to the Standby
position.
2. Press the silver power button on the front panel of the amplifier. The
regulator LED, labeled R, will illuminate. Once the regulator secures control -
of the output stage, the bias LED, labeled B, will illuminate. The Sustained
Plateau Bias II system is now engaged After the protection circuits have
confirmed that safe operating conditions exist, the input relays will engage.
You will hear a click. The amplifier is now ready for operation.
3. With the preamplifier in the Mute position, or volume control fully attenuated,
select a source. Turn the volume control up to your desired listening level.
4. When turning the system off, lower the volume of the preamplifier completely
or place it into the mute or stand-by position. Switch the amplifier to Standby
by pressingth e silver powebr utton.I t is nows afe to turn off the rest of the
system.
NOTE For optimal performance the rear panel power breaker should be left in
the ON position at all times."
http://krellonline.com/assets/support/FPB_ORIGINAL_SERIES_MANUAL_V982.pdf