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Well do be fair, Lehmann does say on his website:
... the zero global feedback Class A output stage.
Both statements (zero global feedback, and Class A output stage) are technically true. I guess we shouldn't expect him to also say "by the way, I put in a US $4 opamp for the input stage"
The Lehmann chassis looks to be better and more precisely built; and I'm sure Lehmann put in a significant amount of effort into selecting the components on the PCB to voice the amp a certain way. No one has yet compared the M-Stage with a BCL, it could very well be that the BCL does sound better.
On another note, and upon closer examination, the M-Stage looks similar to a two channel PPA v2 (with a simpler diamond buffer and without the separate high/low current power sections and no class A biasing of the opamp.) There are really not that many different ways of building chip based amps. Everything in audio amplification has already been done before - generations ago. What it comes down to is implementation (parts selection, layout, etc.)
... the zero global feedback Class A output stage.
Both statements (zero global feedback, and Class A output stage) are technically true. I guess we shouldn't expect him to also say "by the way, I put in a US $4 opamp for the input stage"
The Lehmann chassis looks to be better and more precisely built; and I'm sure Lehmann put in a significant amount of effort into selecting the components on the PCB to voice the amp a certain way. No one has yet compared the M-Stage with a BCL, it could very well be that the BCL does sound better.
On another note, and upon closer examination, the M-Stage looks similar to a two channel PPA v2 (with a simpler diamond buffer and without the separate high/low current power sections and no class A biasing of the opamp.) There are really not that many different ways of building chip based amps. Everything in audio amplification has already been done before - generations ago. What it comes down to is implementation (parts selection, layout, etc.)