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Old 3rd May 2018
Gear Maniac
Biosynth's Avatar
here is my point of view (I have two AML1073, which is a reference in 1073 clones):

1073 signature is a big smiley curve, with extended low and highs, a compressed sound with silky high freqs. I find the lows and low mids in the HE73 but not the hi-mids, these freqs are raised here (and in a bad way). It's too bad because highs are good too and in 1073 spirit.

WA73 doesn't have the 1073 sound. Lack of lows and highs, too much mids for a 1073. Closer to classic SS preamps.

faceplate of HE73 is great.

Conclusion: I prefer HE73, but this bad high mid rise is a drawback.