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New listening room electrical design

I'm moving to anew house in a few weeks, and trying to figure out the electrical design.
My current room was designed by Rives and I have numerous dedicated lines in it, so, I'm somewhat familiar with the topic.
The new system proposed outline:
New dedicated subpanel, exclusively for the audio components (main located in the garage, adjacent to the new room).
I have 2 speakers (Avantgarde) with powered subs
2 separate JL Fathom subs
2 mono block amps (lamm ML2)
and number of front end component, locate on stand, that going to be on the side wall
(Preamp, crossover, TT and CD player)
I'm thinking:
Two lines with 2 duplex receptacles each to power avant-garde and JL subs
Two lines with one duplex each for Lamm mono blocks
Here is my main question:
For the preamp, crossover, TT and digital I have the following options:
1.   One line with two duplexes for the analog stuff
       Another line for digital
       3 duplex recptacles on 2 separate lines
2. One line (or two) and one power distribution box with 3-4 duplex receptacle, connected to the wall receptacle
3. Two lines hardwired (no wall receptacle and no IEC and power cord in the Power distr. box) to power distribution box, separating analog from digital receptacles inside the box

What is a better approach for the front end components?
Multiple lines feeding one duplex each,
One line feeding multiple duplexes
One line feeding power distribution box?
maril555
whart's avatar
whart
3,051 posts
 
I always learn something from Jea. Question: unless the construction of the drywall/studs is  already first rate, won't it be way easier to tear it out and start from scratch? 
Re Jea's comment about the proximity of the subpanel to the outlets, couldn't you locate the subpanel toward the front of the garage, to increase distance to the receptacles? (I guess that means a greater distance between the main panel/service entrance and the subpanel and I don't know what code implications there are for that).
FWIW, I used some of that mass loaded vinyl (comes in rolls and man is it heavy) in my adjacent mini-room as part of a sound proofing exercise, and I gather that it is intended to give drywall construction far more mass (apart from the soundproofing application I used it for- coupled with those acoustic blankets in my case). 
I'm enjoying your research phase vicariously, and taking notes for my own benefit. 


maril555 OP
619 posts
 
Whart,
Why do you think I should increase distance b/w subpanel and receptacles?
maril555 OP
619 posts
 
Whart,
Why do you think I should increase distance b/w subpanel and receptacles?
whart's avatar
whart
3,051 posts
 
Maril- I was curious about the solution to the comment Jea had made up thread. There, Jea said:

"JMHO, if the subpanel will be somewhat close to the audio equipment’s branch circuit wall receptacles (15ft or less) imo, that kind of defeats the purpose of multiple dedicated branch circuits for the purpose of decoupling the power supplies of audio equipment from one another. Especially Digital from analog.

Imo, the amount decoupling is largely due the length of the branch circuit wiring impedance of the branch circuit wiring used, especially NM-B cable (Romex is a trade name of NM-B), or MC cable. (Both use THHN insulated copper conductors.)"
__________
I don't know the answer, in fact, I had never realized that was an issue, so that's what prompted my question. 

maril555 OP
619 posts
 
I actually took it the other way- I thought the closer subpanel is to the receptacles, the less of an issue decoupling will be.
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