Tonight I finished assembling Mirand A1V12 in a new case (Cresnet SMPS Audio SMPS units for sale). And again I am very happy with this amplifier, it is my favorite in the AB classAnd this is the first time I have listened to it with Mirand DAC 1.2a, USBbridge sig, Sghanti. Exceptional! And many thanks to Sonny !!!
HI Van
Looks great.. What's with the copper in between? Any sound improvements?
Thank you sebbyp
I was using HQ Player (trail version) before when I had classic Allo UsBridge (sparky based), though it was great better than Roon sound wise, it had stability issues with Mirand 4490 USB DAC, it used to loose connection once in couple of weeks and after multiple restarts both DAC and UsBridge and replugging USB cable it used to work for few weeks before it disconnects again, not sure the exact reason.
I started using Tidal and I moved to Roon and it was much better stability wise, Need to try HQ Player again, might be it would work well this time with my new Allo UsBridge Signature.
Also I have Salas BiB kits for Analogue stage and two Ref-D mini kits to power both clean side and USB side of the Dac. I plan to try them soon.
HQ Player is really good but it's far from being day and night compared to Roon own DSD... You can hear it does a better job but for me, I don't think it is worth investing in a license and all the extra horse power required... I'll play with it some more with different settings and hear how it sounds..
Do
Do
Hey ravid
If u still have 4490... Have u try removing the nte clip off the feet. ... And power it from outside.. It's night and days difference in sound and stability., I think because I'm using reflector d. It just didn't like the nte 0505 load and cause many issues as well. Try any good low noise ldo..only total removal will work.. Otherwise it's the same.
And use the best supply as well... 4490 sounds crazier than ever.. Super yummy
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I'm not sure what V. of HQp you were using, but the recent version 4.0 is much more stable.
When things go wrong, which is never at the moment. The best way was to turn off hqplayer, ssh into the output and restart NAA.
Cut pin 1 and 3 Vin
Cut 7 and 8 v out
Previously I was lazy didn't cut 7 and 8.. The upgrade failed. Still same problem.
post #1496 by aboe shows location of nte 0505mc and the jumper j13 I think for external input make sure right direction
Feed your favorite isolated supply since nte0505 mc is actually an isolated DC to DC. I am using Lt1963 on a separate transformer unused winding . Different caps etc change the sound in a huge way as well.
With Same winding.. Effect of sound improvement is small.
A small receiver cap soldered on pin under the jumper also helps.. To help transient. I tried there is a diff.. 47 ish uf for me.
Also, I was lazy to cut 3-7-8
Last night I did it and it is an improvement in sound!
Thanks , Anthony
Honestly, I was a long time against SMPS, but now, with Cresnet sources, I do not notice any difference in sound. I also did a blind test with friends, no one could say which is the classic source and which with SMPS from Cresnet
An ABX test of two identical amps - one with a classic psu and one with a smps would be very interesting. I have been considering a Connextronic SMPS for my setup (when built by Sonny) BR, Per
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Sorry, AnthonyA, but that reminded me of this terribly off topic but very funny clip... The name mixing - which I btw am very good at - starts at 2:50 - but see the whole clip
YouTube BR, Per
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Unfortunately, do not have much experience in regard of SMPS (though have hypex in one amp) but the question reminded an old comparison
First One - mosfet amplifier module