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- May 28, 2020
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Of course within operating range, I agree there is almost no audible difference.I would be very surprised if 1% of trained listeners can identify the Purifi 7040SA versus the Purifi 400A in a level matched blind listening test. You might find a rare system that offers a tell but I would really have to dig to find a speaker configuration where the difference is easily identifiable.
What I'm referring to is the scenario of someone with 2ohm speakers (or even a subwoofer) where the 400a is being pushed to its limit or even past, the 7040sa would be am advantage and that's when you may hear a difference (since the 400a in this scenario may be clipping but the 7040sa isn't).
Again, a niche scenario for sure.