I've already purchased this new product, purchased in the Aliexpress, the produce is in activity, the price is well, hope to receive the results as good as they described, I will post the experience of the follow-up!https://www.aliexpress.com/item/1005006890777045.html
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New AIYIMA MM/MC Phono Preamplifier
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CassilinRyan
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AIYIMA has released a new phono preamp, has anyone bought and tested it？
With a phono pre? Possibly. But only if you can hear noise from the preamp with the inputs shorted. Then it might be worth installing some low noise op amps if the stock ones are not already.
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$75
i looked at this thing and i couldnt work out how you change mm/mc and likely parameters and until i saw the bottom and then i though...
oh god
dipswitches???
is that ok? in 2014? like the last time i had to do dipswitches i was still in the employ of the dept. of defence playing with their toys...
Yes, absolutely. Glad you're not playing with those toys anymore.
Has anyone bought this and used it? Aiyima basically posted a handful of thing, and then walked off. Their specifications are terrible and don't make sense. SNR is "76dB" but the SINAD is (according to the measurement) "85dB ref to a 5mV input"? But wait, SINAD is THD+N, so how does that make sense if the SNR is referenced to a 5mV input? What input did they measure that SNR at? I am also curious what the specifications are in MC mode.
Perhaps someone from Aiyima can interject here again. The attachment to Message #7 seems to suggest that the SINAD/SNR is around 85dB (unweighted) in I assume the gain in MC mode is 60dB, but there is literally zero about it anywhere. Presumably it would be 65dB with a .5mV input, but who knows. Can anyone from Aiyima confirm? And what are the overload margins, actually? They just posted a random measurement and not the whole curve. And the frequency response is +/- 3dB? That can't be right. That would be absolutely awful. And what in the world is a "maximum output amplitude" of 450mV? That's not a real specification, and I can't even begin to figure out what it might mean.
If Aiyima wants to sell these things (and they could sell a lot if they are as good as at least some of the specifications would appear), they really need to clean this up. Show the RIAA curve, post the MC specifications, and state the overload margins properly.
Perhaps someone from Aiyima can interject here again. The attachment to Message #7 seems to suggest that the SINAD/SNR is around 85dB (unweighted) in I assume the gain in MC mode is 60dB, but there is literally zero about it anywhere. Presumably it would be 65dB with a .5mV input, but who knows. Can anyone from Aiyima confirm? And what are the overload margins, actually? They just posted a random measurement and not the whole curve. And the frequency response is +/- 3dB? That can't be right. That would be absolutely awful. And what in the world is a "maximum output amplitude" of 450mV? That's not a real specification, and I can't even begin to figure out what it might mean.
If Aiyima wants to sell these things (and they could sell a lot if they are as good as at least some of the specifications would appear), they really need to clean this up. Show the RIAA curve, post the MC specifications, and state the overload margins properly.
Addicted to music
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Nice unit, well bulit and solid.
About sound, I've paired it with an ATVM95E and nothing special happened: transparent, silent but a bit "boring".
I've swapped the bundled op amps with a couple of Muses02 and things changed: better density, mid-bass presence and a well refined top end compared to stock ones... But levels were still too low for the AT even with both gain and volume knobs to max.
So I tried it with the challenging DL103R... No way as expected...
Moving to Hana SH and Denon DL110, (using the MC gain) the magic happened: wonderful funny sound.
Nice stage, imaging is not sharp but now it sounds open and engaging.
The gain and volume knobs are somehow "discrete" and work well to find the right spot for each record. Still very silent, no hiss or buzzes coming from speakers.
It is a sort of little paradox... It seems to work best with high output MC carts (using the toggle beneath) or probably likes best MM with an output greater than the one offered by AT.
A very nice well priced if you're searcing for a funny phono stage. The OP swap is up to one's preferences, to my taste Muses sound far better than stock ones.
About sound, I've paired it with an ATVM95E and nothing special happened: transparent, silent but a bit "boring".
I've swapped the bundled op amps with a couple of Muses02 and things changed: better density, mid-bass presence and a well refined top end compared to stock ones... But levels were still too low for the AT even with both gain and volume knobs to max.
So I tried it with the challenging DL103R... No way as expected...
Moving to Hana SH and Denon DL110, (using the MC gain) the magic happened: wonderful funny sound.
Nice stage, imaging is not sharp but now it sounds open and engaging.
The gain and volume knobs are somehow "discrete" and work well to find the right spot for each record. Still very silent, no hiss or buzzes coming from speakers.
It is a sort of little paradox... It seems to work best with high output MC carts (using the toggle beneath) or probably likes best MM with an output greater than the one offered by AT.
A very nice well priced if you're searcing for a funny phono stage. The OP swap is up to one's preferences, to my taste Muses sound far better than stock ones.
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you might want to give akliam opamps a try. after looking into opamps for my a07 max, i decided to give them a go, as they were significantly less expensive, and several reviews said they were either as good or better than the muses...
doug s.
lc5. these seem to be an update to the lc2, (nla, as far as i know), that i have in one of my a07max's. they're a bit unwieldy; i had to make a special cover w/holes cut into it. the newer iterations are even larger still; they wouldn't fit into my amp. i got a 2nd pair for my other a07max amp, but since it drives tweeters >7khz, i decided it wasn't needed. i will probably try them in one of my tuners, or a dac at some point.
doug s.
Hint for anyone new to the forum having read the last few posts.
The consensus amongst most qualified engineers on this site is that swapping op amps is a pointless waste of time and money. At best it will make no objective difference, at worst it might destabilise an amp and cause it to oscillate.
People might think they are hearing real differences but this will almost certainly be because they are not testing blind (not typically possible when swapping op amps) and are hearing the effect of perceptive bias. Alternatively they may be hearing the effect of a destabilised amp oscillating.
tl:dr - don't waste your effort
The consensus amongst most qualified engineers on this site is that swapping op amps is a pointless waste of time and money. At best it will make no objective difference, at worst it might destabilise an amp and cause it to oscillate.
People might think they are hearing real differences but this will almost certainly be because they are not testing blind (not typically possible when swapping op amps) and are hearing the effect of perceptive bias. Alternatively they may be hearing the effect of a destabilised amp oscillating.
tl:dr - don't waste your effort
Oh great. Then I'm sure you've applied the engineering approach, done the design calculations, implemented the change then done the measurements to show everything is stable, AND generating the measurable improvement you are expecting.
Or are you just using a layperson's trial and error approach and your bias prone human senses as validation?
In any case - I didn't make my post to start a debate with people who've already fallen down the rabbit hole - but in an attempt to prevent others from being led down the same pointless path.
Have a nice day, and enjoy your tinkering.
somebodyelse
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What controls do you apply when hearing this difference to ensure it really is your ears and not your eyes or preconceptions?
In any case - I didn't make my post to start a debate with people who've already fallen down the rabbit hole - but in an attempt to prevent others from being led down the same pointless path.
Have a nice day, and enjoy your tinkering.
In this case, happy evangelizing!
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