Just how many outlets do you need for your stereo?

spatialking,

As long as you are on a single outlet, you can have a walwart extender to plug in those wide annoying boxes :-)  Since the plugs are very close to each other in electrical terms, it is unlikely you will have a ground loop problem.

This one has 10 physically widely spaced out ports for almost everything and rated at full 15 amps.  I think you can connect an entire studio to it :-)

https://www.amazon.com/TESSAN-Mountable-Extension-Security-Safeguard/dp/B07VVKSYCZ/ref=sr_1_8?dchild...

It is a question that cannot possibly be answered. It is dependant on what you own and what you intend to own. You could need anywhere from 4 to 20....who knows?? What is most important is not plugging the power strips/conditioners into different circuit legs. Keep them all plugged into one circuit, preferably a 20 amp dedicated circuit. The niagara 1200 is a great device. Also, the much cheaper furman pst-8. It is designed by the same guy. These two mentioned will give you I believe 15 outlets.
I use both plugged into a single AQ Edison receptacle wired with 12/2 romex (50 ft) to the service panel using a separate 20 amp breaker. Below are a list of what I have plugged into the two...

Integrated amp
Sacd player
Cd transport
Dac
Tuner
Turntable power supply
Phono preamp power supply
Headphone amp power supply
Cassette deck
Digital streamer
Total: 10 items currently...will be introducing my kenwood minidisc recorder and second turntable at some point, so that will be 12 outlets used.....

One circuit may be the optimal way to go, but some who have really powerful amplifiers may want more power than 15 (or even 20) amps for the whole system.  
Also, some don't care for conditioners/filters and would rather plug their gear directly into the wall, particularly analog gear.  If installing new power, having multiple lines should not be a problem if they are dedicated (i.e., directly wired to a single outlet so they do not power anything else) and all run from the same side of the panel.   I believe there may be other best practices such as keeping audio circuits away from circuits powering noisy fans and resistive/variable type devices.  Another option is to establish a sub-panel (like 50 amps) and then run all the audio system outlets from that.  I am fortunate that my 3, dedicated, 20A lines are absolutely quiet.  

@mitch2 @audioguy85  Thanks for the info, it was very helpful. 

The two units from Amazon arrive today - these are the two I mentioned before .  For $250, I am not expecting much in the filtering but the sequencing will be much appreciated.  I will report back on the innards and performance.  Hopefully it will serve as a stop gap for now until I find something suitable for long term use.

Keeping it at one dedicated receptacle avoids a ground loop issue. I suppose if you need more than 20 amps (I doubt it) you could always go with 10/2 cabling and a 30 amp breaker and 30 amp rated receptacle. To me it sounds like over kill.