Noise is only 0.25uV.
I can confirm that it is less than 0.4uv-Less than Apx555B's NoiseFloor
In such a measurement, it will be very sensitive to environmental interference, etc.-I will confirm it again after I move to my garage
Noise is only 0.25uV.
I just measured it right before the post. I had the volume all the way down and no input connected. When I had the input connected it turns into around 0.3uV but not stable reading. It's indeed lower than 0.4uV nonetheless.I can confirm that it is less than 0.4uv-Less than Apx555B's NoiseFloor
In such a measurement, it will be very sensitive to environmental interference, etc.-I will confirm it again after I move to my garage
I just measured it right before the post. I had the volume all the way down and no input connected. When I had the input connected it turns into around 0.3uV but not stable reading. It's indeed lower than 0.4uV nonetheless.
You haven't mentioned the noise measurements method yet. I think I need shorter cables as well.
Without input cables it doesn't go over 0.26uV.You know, I am very conservative. I can see 0.3X or even 0.2Xuv-in some cases. But I think the stable measurement value I can conservatively say is less than 0.4uv.
I also need to customize the short cable-lol
what is the expected cost ?
According to the information I got, it is less than 160 USD
Will it be AC or DC supply? If DC, then perhaps there is scope to improve with even lower noise etc.It's not me that don't want to give permission first of all. It's complying to the whole plan.
Then the unit is really close to the final unit. Only a couple of cosmetic detail differences(not overall appearance or design) and that's it. Same power supply will be used, same board except for the LED for indication will be used, same power outputs, same performance.
As Wolf has said it, 33Ohm(32ohm) power is 2.2W(2.3W) both channel driven. It goes to 2.4W with single channel driven. 16ohm power is 2.8W both channel driven and 3.9W single channel driven. Ok I let it out. (All power numbers are with distortion less than 0.001%)
More to come.
External transformer AC. Any unauthorized supply is prohibited. Change at your own risk.Will it be AC or DC supply? If DC, then perhaps there is scope to improve with lower noise etc.
External transformer AC. Any unauthorized supply is prohibited. Change at your own risk.
This looks better than the A90. Not sure how this is possible! My head hurts from thinking about itThis is a prototype, but the completion is very good.
I did not get the authorization to publish detailed results.
But let it go 32R 750mw:
View attachment 67601
So is it gonna be best in this list ? https://www.audiosciencereview.com/...t-quiet-headphone-amplifier-review-png.42006/I just measured it right before the post. I had the volume all the way down and no input connected. When I had the input connected it turns into around 0.3uV but not stable reading. It's indeed lower than 0.4uV nonetheless.
You haven't mentioned the noise measurements method yet. I think I need shorter cables as well.
That will be the A50S.It looks not bad.I prefer to see a balanced output as suppliment.I think it was not possible to made of the Budget.
A90 at same level is better though? https://www.audiosciencereview.com/...adphone-amp.11946/#lg=attachment53451&slide=0This looks better than the A90. Not sure how this is possible! My head hurts from thinking about it
That's without load.A90 at same level is better though? https://www.audiosciencereview.com/...adphone-amp.11946/#lg=attachment53451&slide=0
Ahh, I see. L30 is looking very good then.That's without load.