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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
gdnrbob
4,419 posts
 
Though I am not an electrician, I would first look at the power you can get from the utility.
I have heard from the techs at McCormack that California power is quite variable and differences during the day/night are significant.
Should this be your case, then maybe adding a power conditioner might be something you should consider.
As far as the wiring goes, and this is only my opinion, I would have a dedicated line going from the panel to your equipment. From there, I would add whatever outlets you need to run your equipment. Stereo equipment isn't that power hungry and running extra lines for analog/digital would be overkill, again in my opinion. So, a single line should suffice which would then feed all the components. (Though if you live in a Thunderstorm or highly volatile area, I would add a whole house power protector- I am sure your electrician would be more knowledgeable. If not you could look for a high end audio dealer to give you more information.
HTH Bob 
Ag insider logo xs@2x
cleeds
5,715 posts
 
gdnrbob
 " ... I would have a dedicated line going from the panel to your equipment. From there, I would add whatever outlets you need to run your equipment. Stereo equipment isn't that power hungry and running extra lines for analog/digital would be overkill, again in my opinion. So, a single line should suffice which would then feed all the components."

This does not look like good advice. It looks like these Lamm amplifiers can draw 1000 watts each. At 120V, that more than 8 amps. I'd want to put each of these amplifiers on its own dedicated circuit.

With dedicated lines, one of the potential advantages that should especially be exploited, imo, is eliminating voltage drop. One way to do that is to de-rate the wires from the service panel to the receptacles. For example, I have 8 AWG wire on some of my 20A circuits, pigtailed in the box to the receptacle. If you have a sub panel, it's wise to de-rate that, too. This can help eliminate voltage drop by decreasing the resistance in the wire. It also has the advantage of providing a better ground connection. This can help lower the system's noise floor.

It can't possibly hurt to separate analog and digital components onto their own dedicated lines, so I've done that, too.
 
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maril555 OP
619 posts
 
Thank you,
let me narrow this down
lets forget about digital for a moment, since it’s gonna be on a separate line.
if I had 6 analog components and needed 6 outlets for them, what would be the best solution?
1. 3 separate lines with 3 duplex receptacles ?
2. 1 line with 3 duplexes?
3. 1 line and power distribution box with 3 duplexes?
4. Power distribution box hard wired to one line without IEC and extra power cable?
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