Cost Effective System Improvement?


My hobby is to get the best possible sound IMO at the lowest possible cost. My system:

Tekton Electron Speakers - Upgraded
Doge 10 Tube Amplifier (generally 30WPC in Class A) with Psvane KT88-TII, GE 5751 3 mica black plate preamp tubes, and NOS Mullard CV4024 phase inverters.
Denafrips Pontus DAC
Canare 4S11 Speaker Cables

I listen only to TIDAL Premium through Bluesound Node 2i using the BluOS on an android tablet. I often listen to vocals and use the following as test tracks:

Vaya Con dios “Don’t Cry for Louie”
Dave’s True Story “Chasin’ The White Line Down”
Dead Can Dance “The Wind That Shakes the Barley”
Harry Nilsson “Without You”
Glen Campbell “By The Time I get To Phoenix”

I would like recommendations on what I might do for a cost effective improvement. I would consider spending $2-4K for different speakers or amplifier. The speakers and/or amplifier would have to weigh less than 80lbs. My back is 75 years old.

I appreciate your recommendations.
chinook9
A cost effective improvement would be implementing some room/speaker/system set-up and optimization tips offered by Jim Smith in "Get Better Sound". $37.70 plus tax and shipping.

You may discover you don’t need to spend anything on new equipment or loudspeakers.

What I been doing for years. First thing you always need to know is what do you want to improve, what do you want to make better? If you are real happy with the way things sound now and just want "more of everything" that is very different than if you are unhappy because something is off. Lumpy bass, hyped highs, whatever. These are a different story.   

If there is something obvious you can put your finger on then that will be your best shot to cost-effectively upgrade. But if not, then almost always it is much better to leave the components alone and work on making everything perform better.   

This is first and foremost tweaking speaker positioning. Next locate the components and route the wires to avoid interference. Simply straightening out a tangle of wires with everything routed to be at least a couple inches apart, never running parallel or in loops, and when they do come close doing it at right angles, these things are free and do improve sound. Get everything up off the floor while you are at it. Sometimes depending on how bad it was and how good you improve this could be worth a lot.   

Next, get every single component up off the floor, rack, etc. Get Nobsound springs, use them under everything. By this point your system sounds a LOT better but you have spent peanuts so if your money is burning a hole in your pocket consider putting the Electrons on Townshend Podiums. Read the reviews and comments, this will be like a whole system upgrade. Better than a lot of components you could buy.  

OR another terrific move would be a Raven Blackhawk. Or Nighthawk, more in your budget. Either one, huge improvement! I have the Blackhawk, absolutely terrific amp, not too heavy. Put it on Nobsound, or Pods if you really want to impress yourself.  

If you do go Raven, call Dave Thompson and he will recommend tubes specifically for your speakers and taste in music. Seriously, the guy is that good. I am not big into tube rolling, it has been a crapshoot for me over the years. Not so with Dave. The man knows his tubes. Some do cost more but compared to other stuff that is out there his seem a bargain to me.
50% of your sound is the room, room treatment and speaker placement..

Figuring out how to do it, spent the 37.70 like tvad said..

Best dollar spent for a sound return. :-)

Vibration control and decoupling is # 1 for bass management and cleaning up bass bloat and smear.. I always though people did the room first and decoupled their speakers. Then I started posting here and found out a few do it just backwards.

Spikes, bare walls, bare floors and ceilings, Yikes!!

Gear swaps? Not so much for me..

The room first
Decouple
Clean up the electrical/protect your gear

Everything else.. LOL

Regards
$500 worth of RasPi will blow out that BluNode.
So much for "bang for buck."
You get a lot more SQ for a little work.

Ditto on $$ best spent on the room.
I suggest, decouple speakers from the floor, first. It can be like getting a new set of speakers. Herbies, or Sorbothane pads would be the most cost effective way of doing this.