Amplifier and Digital Streamer on Single 15A Circuit?

Without dedicated AC lines you need to control the noise from the grid, your household appliances, and the contamination caused by digital devices.
PS Audio Dectet may be a possibility. It’s important to find a conditioner that is non-current limiting, meaning an amp can be plugged in without suffering a restriction in the power supplied.

OP,

I recommend a high quality power distribution block for your gear. I have all of my digital gear and amps plugged into Nordost QB8. I found QB8 to be very effective in isolating and lowering noise. One thing I appreciate about Nordost is their modular approach...once you settle with QB8, you can add Qv2 and Qk1 plugin modules to further enhance the sound of your system. Each component in Nordost power conditioning is complementary, the more you add the better it gets.

You may wanna read up on Nordost QRT system before you buy a brand X power strip. 

I started last year with QB8 and now have full QRT system.

I would start out in the garage or wherever that 15 A circuit starts..start there..make sure panel connections are TIGHT..have an electrician do this, IF you are not qualified and competent and MOST importantly SAFE.
Check to see IF your dedicated circuit is on same leg as bigger motors in house, furnace, freezer, AC, heatpump, refrigerator, etc.. IF possible move to opposite leg of panel.
I always replace the breaker in lanel unless I know it if freshy fresh ! they corrode, etc..

Next ditch the el cheapo outlet on wall for at least a Hubbel Hospital grade.

Next I would get a Furman 15i or better to plug the streamer, network switch, wallwarts and other trash generating junk into...

The big dog I would run into wall direct, unless you hear no difference by running it thru conditioner...

even my lowly 1961 MC240 sounds better direct into wall over a bevy of $3 K conditioners...

IF you cant hear a difference, consider trading the Diabo...ya overspent ( this is 99.324% a joke )

also try running the server/streamer off another circuit with a hyper quality extension cord..make this up w 12 G and Hubbel Hospital grade components.. TO evaluate what happens...then you can judge IF hiring electricians to fish an outlet will benefit you.

FWIW, I try to actually follow my own advice....5 dedicated circuits in my reference room just for audio..

have fun

sounds like you have fantastic components !!!!!!

Awesome advice, thanks all.  I think the Diablo straight in the wall will be the way to go, based on what most have said. 

I’ll upgrade my two wall outlets as well.  Possibly with PS Audio outlets which are inexpensive.

The Furman and Nordost options look good but so does the PS Audio Dectet.  The AudioQuest Niagara 1000 also looks good but much more expensive.  Any thoughts on the AQ?  I’d only be using the conditioner for the streamer.

Installing dedicated lines to isolate my streamer seems overkill to me, but my wife was actually telling me it wouldn’t be too big of a deal!!  Do dedicated lines actually help though?  Don’t circuits end up cross contaminating each other anyways?  I was inder the understanding that you have different circuits to manage current load, but that the circuits themselves are not really isolated.  Thoughts?

I like tomic601's advise of checking connections.

Besides that a balanced transformer in the power cord, such as the one Core Power makes may be excellent on the streamer, and it will isolate.

For the amp, a heavy duty outlet such as Hubble is necessary. Jena Labs has cryo treated ones for a good price. A high quality surge protector at the breaker box such as The EP2050 would improve the sound of the entire system, and give protection. A cheaper one would be one from Eaton. Will protect but not improve the sound. The right power cord is essential to best sound. Try a few... like four or five.

I also second the Nordost devises. I have a few, but they are not cheap. There are a few passive/plug in types out there.