A couple of questions first (just trying to visualize your situation):
You have a single duplex (two receptacles) wall outlet?
Is is on a dedicated (or otherwise 'unused' circuit)? 15 or 20 amps?
How many devices (including your amp, but not counting your PLC) are we talking about?
How many outlets on your PLC? Are any of the PLC outlets digitally filtered? (Sorry, I'm unfamiliar with the MR 2000)
And, lastly, with respect to "not restricting the dynamics", what kind of amp are you using (and what is it's power rating) and what is the total capacity (watts) of the MR 2000?
If you could just answer these questions, it would make it a lot easier for someone to target any advice they might offer you.
You have a single duplex (two receptacles) wall outlet?
Is is on a dedicated (or otherwise 'unused' circuit)? 15 or 20 amps?
How many devices (including your amp, but not counting your PLC) are we talking about?
How many outlets on your PLC? Are any of the PLC outlets digitally filtered? (Sorry, I'm unfamiliar with the MR 2000)
And, lastly, with respect to "not restricting the dynamics", what kind of amp are you using (and what is it's power rating) and what is the total capacity (watts) of the MR 2000?
If you could just answer these questions, it would make it a lot easier for someone to target any advice they might offer you.