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Is this balanced?

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perfusionista
1
Nov 29, 2020
It's not. It's very complicated to make a true dual balanced topology. But it's irrelevant. Yes, balanced cables are cool, and you wanna be purist and have totally balanced. But even the best ears can't hear .00000X distortion. Use these with Etymotic ER4XR IEM and you will hear background singers and inhalations and really amazing transparency. Honestly, we've reached the limits of what's possible with amplification. Don't worry about balanced, it's unnecessary unless that's the only way your headphones will work.
Jakob
352
Mar 6, 2020
Read it is not pure balanced throughout the circuit but I have also read it's not an issue as the advantage of a balanced circuit is low noise and this tests objectively very very low noise making it of no real advantage.
ds60
78
Apr 19, 2020
Balanced also means more circuit isolation so less crosstalk, but the amp still performs wonderfully in that regard.
Ares78
1371
Dec 17, 2019
It does support a balanced XLR output but it isn't truly balanced
Artismo
450
Nov 6, 2019
As in true dual mono? No, I believe the engineer covered this in the discussion, but if IIRC, according to him, the performance difference is negligible or non-existent.
Artismo
450
May 8, 2020
SET at 300ohm it will not be 1.5w. The spec sheet states 100mw at <1% THD, less if you want less distortion. It is also widely known that the SET output is the weakest feature of the 789, with the Atom providing more power. The HD650 is 103dB/v SPL converted to 97.7dB/mw SPL. At 300ohm, it would only require 2 milliwatts, 0.77 volts, and 2.6 milliamps to reach 100db at 1kHz. That’s about the same loudness as being 1 meter away from a speaker at a night club. Even at Gain 3, the 789 should have no problem powering the HD650 to piercing and damaging levels to both you and the headphones.
Lmvrtinez
48
Jan 4, 2021
Seems like your issue is your DAC Vrms feeding into your Amp. Originally I had this from my PC and I was also at gain 3, 12 o clock. However when I got an external DAC that feeds 2.1 VRM fixed into this amp, I no longer can go past gain 2 on my sennheiser hd 6xx