Or build their own ...It's something I'm frequently asked about by customers but simply can't give an answer because we just don't have the data.
A call out to to ASR readers to send in their pre amps
Or build their own ...It's something I'm frequently asked about by customers but simply can't give an answer because we just don't have the data.
A call out to to ASR readers to send in their pre amps
Yep. And it's easy to fix: just use several resistors in series; it reduces voltage over each resistor which reduces distortion accordingly.His measurements are over ppm. Apx555 here has distortion harmonics of near -150db which is 30db less than ppm. Any precision analogue designer knows that sub ppm is a completely different world.
Even then, Douglas self has stated in the amplifier design book that feedback resistors of the amplifier are extremely important because of the voltage coefficient. Any voltage division will have voltage coefficient in the equation.
I don't think so. @amirm did measure with attenuation of -6 dB in low gain. He should remeasure at max volume (and maybe -6dB input voltage?) to see if THD goes down.Just let amir measure -3db or so attenuation and see how the harmonic goes. I predict it will increase to around -130db or even -120db instead of the -150db mark without any attenuation.
We will have to agree to disagree. If we view listening tests as unproductive and usually misleading, evaluation of equipment is then quite alien to our actual capability to discern and make choice, which includes enjoyment.
Dwelling in a world of measurements and visual treats alone, Yes is informative to a degree and looks very impressive, but should always be, IMO secondary to actual listening experience.
Thanks for the recommendations. These don't appear to have multiple ins though?
First one yes. It does help. But the difference between good and mediocre resistor can be tens even hundreds. So using 2 or 3 pretty good not best resistors is pretty good choice.Yep. And it's easy to fix: just use several resistors in series; it reduces voltage over each resistor which reduces distortion accordingly.
I don't think so. @amirm did measure with attenuation of -6 dB in low gain. He should remeasure at max volume (and maybe -6dB input voltage?) to see if THD goes down.
How long as this model been out? I don't think that long.It’s,s bougth used so how old is it really .? So one channel is probably broken ?
Not me. I already know the answer to that one.That channel difference makes me wonder about Schiit QC....
For 6 high level sources the LAP-2 by Funk Tonstudiotechnik is a very good product, but not really cheap (starting at ~ € 1100). It measures almost perfectly.
I have a Parasound New Classic preamp that works great. A lot less than $2000Thanks for the recommendations. These don't appear to have multiple ins though?
PerfectHow is this for measurement at different gains? Input is at 4 volts (XLR; will use 2 volts for RCA):
View attachment 46430
If you have time, what are the distortion measurements at low to medium listening levels, with normal consumer audio sources- if possible please ?How is this for measurement at different gains? Input is at 4 volts (XLR; will use 2 volts for RCA):
View attachment 46430
How is this for measurement at different gains? Input is at 4 volts (XLR; will use 2 volts for RCA):
View attachment 46430
Does its measurements also reflect as 'works great " in its ability reproducing music - if so can you describe what you think is good about it relative to other preamps and other forms of attenuation, that you have tried.I have a Parasound New Classic preamp that works great. A lot less than $2000
https://parasound.com/200_Pre.php
How is this for measurement at different gains? Input is at 4 volts (XLR; will use 2 volts for RCA):
So i guess skip this as a purchase?