Need advice from the gurus.

@cleeds  

If I was off-base, then apologies and I stand corrected.... 

My understanding has always been that in a fully balanced system, the 2 channels are completely separated from the input through to the output while something that just converts single ended signal (in and out) through an op-amp to XLR connections is different.  Also in a non-fully balanced setup, the L and R channels share a common ground.  So, wouldn't the differences in the impedience be caused by the op-amps used.

Honestly, have I misunderstood something?  

- Jeff

@jeffbij 
This is per 6moons regarding the AMP-150, I assume the "AE" version is identical.

"The input PCB sits near the back plate and sports NEC relays and an analog BB PGA2320 resistor-ladder IC. As a single-ended circuit, the XLR i/o ports are convenience items de/symmetrized by a TL07a chip."

The AE version is sonically identical … again, from Gato

So, balanced connections but not a fully balanced circuit.  

That's ok.  Still worth getting hold of a pair of decent balanced cables and seeing how it sounds with using the Gato as a preamp with the monoblocks. 

Sounds like you know what you want you just aren’t hearing it in your system. I  would start with your speakers and then go from there.  One step and one piece of equipment at a time.  Have you heard a pair of speakers that you like?  Have you checked out local dealers and showrooms in your area?  I would find a pair that you like and try trading in the speakers you don’t want to help pay for the ones you like.  You’re on a musical journey as part of this hobby.  Take it slow.  Trust your ears.  Stay within your budget.  Make sure you can try anything you buy at home and can return for little or no fee if you don’t like the sound.  Most importantly, enjoy your music and your journey.