Balanced driver

[IPunchCholla]

Hold on, isn't THAT1206 a balanced INPUT to single-ended output, while DRV134 is a single-ended input to balanced output? How can they be pin-compatible? When their functionality isn't even the same

Your right. Reference circuit was for THAT1606.

 

[IPunchCholla]

Updated Frequency spectrum with silence eliminated.

 

[Sokel]

How do you generate your test signal?
Here's a perfect one to use if you want to stick to audition:

 

[IPunchCholla]

Latest two measurements. This is using REW's tone generator through the headphone out on my Mac mini M1 to the driver to mic 2 on my Scarlett 4i4 which I have calibrated using REW. I'll repost if I ever redo the mains wiring and grounding wiring off the power supply.

Left Channel:

Right Channel: