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The RHNP is a class AB design but it is biased into Class A for all intensive purposes its a Class A op for most listeningā¦just because a certain chip or transistor is used makes it automatically be a certain class of amp by definition.
Well, in case of an integrated Class AB amplifier chip, it is a little difficult to change much of its behaviour unless you have the manufacturer customize them for you.
If you had a look into the datasheet for the TPA6120A2, you would see it does not offer more customization options than your average 8-pin Dual-Op-Amp.
To be clear: It is possible to bias Class-AB into Class-A, looking at the PCB shots available on the internet, unless there is some circuitry on the back of the PCB, there is no biasing happening.
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Totally understand and agreeā¦I sent a note to Neve and have asked them the question directly. Nothing like asking the āsourceā vs us guessing out hereā¦
If I get a response I will post.
I also will pop mine open and take a look at the bottom side of the pcbā¦do you have a schematic of this amp?
Tried sending u a messageā¦
I received a nice response from Neve:
"The amplifiers are biased for operation between a 0V and 24V rail (The input is biased to +12V). That may be where the confusion lies? But the RNHP is a class AB design, and does not have a transistor biased output stage like many of our other designs. The headphone amp in the RNDAC has a mostly class A signal path, but the output amplifier is still a class AB design. "
FYI
Alex
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