Just so that everyone understands their options with how these can be used, my unit stays plugged in to the wall 24/7. The performance is exactly the same plugged in vs unplugged.

Even plugged in to the wall, the components are still powered by the EcoFlow battery. The only time noise is introduced is if the internal charge starts during stereo use. In the event that this happens, there is a buzz that occurs. If this happens to me during play, I go into the app and jump the recharge limit level down.

And I have yet to ever hear a fan come on with mine.

There I was, just minding my own business when my neighbor, my retirement investment guy, came poking around my garage to see what I was doing. He knew that I built speakers, so he asked about if I could look at his old college speakers.
He said that he had some old Advent speakers that the foam surrounds had rotted off of them. So I quickly looked online and saw that there were cheap  surround kits available and somewhat reluctantly said that I would look at them.

Well a couple days later he dropped them off. The Advent's turned out to actually be Infinity RS 4000's with both the bass and midrange drivers roached.

Another quick search turned up a surround kit for both drivers and they were summarily ordered.

I then took everything apart, pulled drivers and possibly the most chintzy crossover ever out of the most surprisingly stunning conditioned 40 year old speaker boxes in captivity.

I thought about replacing the crossover components with new stuff but decided that the speakers probably weren't worth the time and money to do that. It didn't look bad and I had put power to it before taking it apart to check if the drivers would move and everything seemed ok.

I did start modifying the boxes though, they were as stiff as Kleenex held together with toothpicks. A bit of MDF has been cut up, lots of 45 degree cuts made and glued inside of the boxes to make them as stiff as a honeymoon pecker!

I'm now in Purgatory waiting for UPS to deliver the surround repair kit.
The boxes will probably get about eleventy seven coats of wax or perhaps a ceramic coating over the next few days whilst waiting then we will see if my skill set includes installing new foam surrounds and center caps that don't have dents in them. Wish me luck!

FWIW the EcoFlow River 2 Pro's fan only comes on when recharging. After it's charged and powering my Mystery amp, it is dead quiet with no fan operating.

HK

Doug, how is the fan on the Delta 3? I haven’t tried the River 2 but folks here don’t seem to notice the fan being a problem. My Delta Pro fan can be obnoxious but not as noticeable for steady loud music. I seem to be more sensitive than others to these kinds of things too.

I paid my two items in full (I was much further down the list) a week ago and one is now in quality control and the other is in testing.  All I am saying is if you have not paid in full, there is an opportunity to jump ahead of the folks who are ready to assemble and have yet to pay and if you look at the list, there are quite a few of them.
Bob

My experience in my system, at that time, was I could not detect any noticeable difference between the EcoFlow plugged in to the wall or not. Later I noticed a small difference in the sound between different power cords when plugged into the wall. That suggests that both can't likely be true. When motivated, I may experiment further. At no time have I heard any noises coming from my system. It has only been a positive step towards a more realistic sounding system.

rubberduck,

Recently we had heavy rains here with a lot of local damage to the electrical grid. They turned off the power around 7 pm with it coming back on around 9 am for two days straight. I used both evenings listening to my stereo system in the dark, powered from my EcoFlow. It felt liberating. I look forward to reading about your experience with clean power feeding your system.

A week ago HK and I were discussing tubes and he mentioned he was having good results with his Ecoflow setup....  Whelp! I just placed an order for the Ecoflow Delta Pro Ultra. They are having a sale for another 24 hours or so.

I didn't read the whole thread as I wanted to give the heads up about the sale if anyone is on the fence.

My plan is place the Ecoflow between the wall and the Torus AVR. I have 2 cables with distributors coming off the AVR. I'm going to try without the Torus as well. Is this the setup most of you are running?

My guess is the cable between the Ecoflow and wall makes a difference due to grounding?

Thank all of you who have shared your experiences.

Hi Doug, hi Geno,
I had read somewhere (sorry, can't remember where) that when the Ecoflow is plugged into the wall it bypasses the battery and just runs like an extension cord. I was looking at one of the river models, but that fact meant that I would have to unplug it from the house main to get the full potential. Is this the same with the Delta? Or does the delta always run off battery power with the house main keeping the battery topped up?

I

Currently listening to The Tallis Scholars singing Allegri’s Miserere.  I’ve never heard vocals this good on any system anywhere at any time.  Running a system on battery power has pushed my system to another level altogether.  

I had to eliminate the DC offset to quiet a couple of buzzing components with the Emotiva CMX2, but that does not seem to have affected the great gains in fidelity obtained with the Ecoflow.  I may buy another Emotiva CMX2 to rid the minor buzzing of the ZROCK2’s transformer.  Interestingly, Holo Audio regularly recommends the Emotiva unit in situations where DC offset causes their big toroidal transformers to vibrate and buzz.  Man, this is beautiful singing!