Mono Blocks on a Budget, is it possible?

I've changed too many things at once to have a good opinion of the Saga.  I wish I had something like a Levinson or a Classe pre amp lying around to compare.  

To be honest, I have a Benq W1070 in this room and my computer running and so my ambient noise is pretty loud.  Plus I usually have to set my HVAC to "fan on" in order to keep this room from overheating.  My phone dB meter says ~60db ambient.  I have considered trying to find a way to isolate the noise from my computer while not overheating it, plus try to find a way to reduce the noise from my HVAC and projector.  I could probably figure out how to do that.

I just put my head right in front of the speakers to try to hear what comes out of them with nothing playing through them.  I don't get a hiss, but I do have audible USB noise.  I can't hear it in my listening position, but it's really obvious up close.  I didn't realize how much came through my Meridian Explorer.  I have to consider whether a Schiit Wyrd or a different DAC would be a better solution to that problem.

I've been catching up on Mr Robot and it is amazing how good these sound for TV.

Alright, I turned off my noisy projector and my phone says 47-52 db ambient noise with the HVAC off.  My phone doesn't seem to pick up the HVAC noise, but I can hear it when it's on.  If I put my head right in front of the speaker and turn the Vidar off and back on again, I can hear ever so slight of a hiss coming from the mid driver.  I would say relatively it's maybe 1/2 as loud as the hiss coming from the woofer which is being driven by the Crown amps.  So I have a little bit of noise coming from both amps.

I can't hear it from my listening position over the ~50db ambient noise.  

This does really make me want to build something to isolate my HVAC and projector noise from my listening position.  I can design that.  I might need to add a little quiet computer fan to be sure the projector is venting heat.  I suppose I should cut a hole in the ceiling and put a tube up through the insulation and vent the heat into the attic.  My only concern would be if it's 150 degrees in the attic in the summer and the fan is off and I let a lot of heat into the room.  I have to consider that more.  But it'd be an interesting and inexpensive experiment.

I do have two dedicated circuits in this room so my power comes straight from the breaker box and isn't feeding anything but my computer, my monitor, my projector and my sound system.  I suppose I could improve that my putting the projector and computer on one circuit and the entire sound system on the other.

I have a Furman DJ "power conditioner" that I basically use as a plug strip and I also have  "POWERVAR" power conditioner that I got on eBay maybe 10 years ago or so.  I don't know if it's good or bad but it was like $40 used.  I can experiment with those things a bit more.

In conclusion, I can't hear the noise from the Vidar in my room while in my listening position.

Maybe you should go to Guitar Center and buy a couple of these Crown amps and run your bass off of them.  They had a 15% restocking fee for up to 45 days.  The difference for me between running the entire speaker off of the Vidar (in stereo mode) and just running the top end was dramatic.  We're not talking 10-15% different, we're talking the difference between a serious high end system and one that was kind of mediocre.  

But there is a reason that the Stereophile review for these speakers says they had to bi-amp them with a pair of Levinson 335's to get them to sound good.  Would if I could.

Ok that answers some questions. I can’t hear anything from my listening position and I’m using an aurender with a SSD so computer noise is very minimal if present at all. If I have nothing on except the Vidars and I run my ears by the speakers I hear very little at the top end but the mid range and subs are humming. They are low and only audible within maybe 3 feet from the speakers but they are definitely producing sound. They amps are on a dedicated circuit - nothing on there with them at all. It was much worse before I did that but it’s still an issue. No power conditioners from my amps, just a surge protector plugged into the wall. This is an improved setup compared to the NAD (which was plugged up through a noisier battery backup) and It was quieter in spite of that so I think it’s the Vidars not the power.

If you plug the Vidar into a single speaker with nothing plugged into it (not bi-amped, the Vidar driving the entire range of the speaker) and put your ears next to the drivers can you hear anything? 

I might need to try a single Vidar in stereo mode, less wattage (dropping the wattage for my setup from 700W to 200W) so less noise... maybe... just thinking out loud.

Why not bi-amp?  I don't have balanced outputs with the Saga so I can't try mine as a mono-block.  I wouldn't be at all surprised if it sounded better bi-amping, either vertical or horizontally. 

I'm just running Transparent The Wall wire right now to the bottom end and it sounds pretty good.  You could test the configuration with inexpensive wires.

the only monoblock amps worth building, would be a 300B or 2A3, and the answer is NO, it's not cheap. sure it would have a "budget"- and it would be a high one cost-wise.