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<The world's most linear amplifier> is a bold statement, and I bet they will fail. Simple reason: the 'analog' volume pot, adding THD, N and all kinds of audio squirks that degrade the AAA circuitry behind it.
So far I don't think there has been any response to any questions about how the volume control is implemented or channel matching.
@Techland Yes it's a bold claim, but we believe it to be true.
The volume control, preamp gain control, etc. are all done well, and have only minor degradation to the core AAA performance. These features are necessary and expected on a product like this. i.e. they're "table stakes".
I'm curious to know what your basis for comparison is, and why you think our claim isn't true?
@SpeakFriend I don't think we're going to reveal much regarding the volume pot. It's special.
Regarding channel matching, it's on the measurement to-do list. We apologize - we are swamped at the moment.
Your claim can't be true unless you use resistor ladders via relay or stepped pot-style switches. It is clear from the costs of this unit that you use a 'normal' pot, and neither the wording 'special' nor your 'believe' changes the fact that the final product no longer has the specs touted for your AAA design alone. Pots, even if special, introduce different kinds of THD effects, degrade SNR depending on the wiper position, have ganging deviations and get more bad when getting old. That is standard technology knowledge that you must have but exclude for a whopping marketing success.
I do not understand why you come up with assumptions just justify your queries here. If you don't have confidence, please move on, and don't join the drop.
You sure can wait till people get their hands on this unit and open it up and let you know exactly what they have used.
It's possible we've missed a competing product that bests the 789 performance. Could you name one that's available for sale now?
It's just that good amps can be let down by poor volume controls.
I thought it was a simple question actually. And important considering the low noise...
Anyway, thanks :)
Is it "special" like what my mom tells me I am, or is it - special - though?
Any clues you can offer to help us differentiate it from the standard cheap volume pots we expect in amps like this?
I understand what you are saying, but considering that you are making claims as to what they are using in this price is pretty stupid.
When the unit is out and there are teardowns we can discuss it.
If you build audio products even as a DIY hobbiest then you will know the quality of the components available can definitely fit into this price range.
My guess is that they aren't making too much profit on this and mostly using this drop with the almost 8 months of time for delivery to fund the rest of the development so they are basically selling at cost.
Could have used a stepped attenuator system, like my Audio-GD NFB-1Amp uses.
I think it is fair to doubt claims. Also, we are all benefiting from questions that prompt the designer/engineer to explain features of the product and their implementation, and the reasons that they chose that over other approaches. What you call confidence looks a lot like blind belief...Don't be just a lemming...At least I would like to know what my $350 are buying...With no preview/review available for an audio product, for now it seems I would be buying a pig in a poke.
Yes, stepped attenuator is possible. But the cost and size impact is large. We found a better THD+N balance by allocating the cost budget toward a nice pot and towards enhancing the linear portions of active circuitry. To see for yourself, you can compare the specs of 789 vs NFB-1AMP. 789 is better for important figures: THD, noise, Zout. And 789 is $150 cheaper.