@immatthewj wrote:

The duplex receptacle came from Lowes and were therefore nothing special.

I have had good results with the plugs below for audio.

Mike

@invalid wrote:

I don't know where all these ground loops are coming from with multiple dedicated circuits for your audio system, I have six dedicated lines of which I'm using four currently and do not have any ground loop problems. 

 

I agree!

I have four dedicated lines for audio, one for each monoblock amp, one for analog and one for digital. I do not have any ground loop problems or hum. 😎

Mike

See article below:

@apogeum Wrote:

One dedicated circuit and all audio components connected with short and low impedance power cables in one power strip for digital/one for analog  to the outlets of a good power conditioner would fulfill most necessary conditions.

See article below, Middle Atlantic Products, Inc.

Power Conditioning
“Power Conditioning” is a very misused term, with no industry standards to allow adequate comparison. Numerous products are
marketed to “cure” AV system noise, lock-ups, reboots and various power quality issues. Many of these are sold partly by fear, partly by
swindling and mostly on misleading “education” that lacks any basis in accepted engineering principles, meaningful data or realistic
demonstrations.
Some people may install power conditioners because they are led to believe that “conditioned power” will improve the way the system
sounds or looks. However, except in rare and extreme situations, these attributes are determined primarily by the quality and
topography of the safety ground system and the integrity of the signal path of interconnected equipment, not by the quality of the AC
utility power.
Two examples of such extreme situations where power conditioning may make a difference include:
- when power is fed from a utility source that is shared by a nearby user of industrial machinery that injects high levels of RF
noise, such as some welding equipment
- when using electronic equipment with cheaply made and poorly designed power supplies, instead of higher quality equipment
that provides adequate noise rejection.
Most power conditioners are essentially low pass filters that are designed to attenuate high frequencies. However, for AV systems,
problematic noise frequencies are under 25 kHz and are essentially unaffected by power conditioners, whose filtering action is typically
effective only at frequencies over about 50 kHz.
The following common problems result in many undesirable situations, including hum, buzz and noise in AV systems, none of which are
solved by power conditioners:

Power Conditioners do not solve
any of these common problems

What actually does solve them

Effects of ground loops (hums, buzzes & video hum bars) Single-point reference ground (can be derived by an isolation transformer), balanced
interfaces, heavy braid shields on unbalanced signal interfaces (keep shorter than 3 ft.),
twisted power conductors
Power line common-mode noise Shielded isolation transformer
AC magnetic field induction (hum & video roll bars) Coaxial cables or twisted conductors within signal and power cables; separation of signal

and power wiring bundles
Cross phase coupling (doubles hums & buzzes) Same phase power
Shield current induced noise Heavy braid shields (instead of signal cables with drain wire)
Pops, clicks and noise from arcing contacts AV equipment powered from dedicated branch circuits, local arc suppression devices at

the appliance or switching device

Control system lock-ups UPS, surge & spike protection, single-point reference ground, avoiding AC electromagnetic

induction into control wires, opto-isolators for long RS-232 links

Hissing at loud volumes during quiet passages Tiered gain structure; higher quality equipment

39 Integrating Electronic Equipment and Power into Rack Enclosures © 2002-2010 Middle Atlantic Products, Inc.

The System Approach to Power Quality