VOLUMIO soundcheck invitation for Hamburg, Germany

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VOLUMIO soundcheck invitation for Hamburg, Germany

Postby judydudi » Wed Jun 26 2019 17:50

orchardaudio wrote:I think that in order to make this a much more fair comparison the factory PSU should be used for all units as most users will not upgrade the PSUs as you have.

As a separate note how much does the Thel dual LPS cost?


you are right. pecanpi and primo were disadvantaged by the choice of a better power supply with the other devices.
I will use the normal allo 5v3a power supply for all devices in which no power supply is shipped with, on next event.
However, I do not think the difference was very important especially because of the amp.

ps :
http://www.thel-audioworld.de/module/NT ... Q.htm#NT25 + Filter http://www.thel-audioworld.de/module/Ne ... filter.htm + case + kabel
so similar to sbooster lps
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VOLUMIO soundcheck invitation for Hamburg, Germany

Postby SanjeevM » Thu Jun 27 2019 02:33

His Judy,

Why don't you use a Class A amplifier, like a Jean Hiraga or F5 etc. It brings out the best musicality.

Regards.
RPi3B+ / Katana THD on IFI Adapter / 7in Waveshare Screen / TPA3255 Class-D on MW LRS-350-48 / Paradigm Monitor 11;
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VOLUMIO soundcheck invitation for Hamburg, Germany

Postby allo » Fri Jun 28 2019 13:57

judydudi wrote:
allo wrote:Those new AMPs look amazing , very revealing . Lets see how they sound.
yes I am also curious about the new digital amplifiers, but

Guys, I'd like to let you know that I've found the right amp for my future DAC board soundchecks.
I am now the proud owner of a Cambridge audio azur 651w.

In addition, I have decided to make modifications to the amplifier.
Mr. Horwege did that for me. About 60 components were replaced.
Now, the amplifier brings the sound into the room with a great clarity, fast, effortless and with beautiful timbres, just as the sound is :)
So it sounds better than anything I had before.
I'm looking forward to the next soundchecks... again focused on the I2S volumio devices.


Amp looks good , THD+N looks good .

When will you have the new Soundcheck ? Hopefully we will have our new DAC out :-)
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VOLUMIO soundcheck invitation for Hamburg, Germany

Postby SanjeevM » Fri Jul 12 2019 17:49

@ALLO: Are you bringing out a new DAC after the Katana?
RPi3B+ / Katana THD on IFI Adapter / 7in Waveshare Screen / TPA3255 Class-D on MW LRS-350-48 / Paradigm Monitor 11;
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VOLUMIO soundcheck invitation for Hamburg, Germany

Postby allo » Sat Jul 13 2019 06:43

Yes. Before you ask,,,ess9038q2m (but its about implementation not DAC ic)

Name : Revolution .

The output stage is using opa1612 (the best monolitic opamp)
USB input
DSD 512 tested and working perfectly .

Dac is working on synchronous mode with all DPLLs disabled (a la Katana) . No crossover distortion.. !!

I have been working with Joe Rasmussen behind the scenes for a while now (he has designed the SQ filter of Katana SQ)
He is a famous modder from Australia that takes hi end DACs and...makes them better .

Revolution incorporates a lot of his work .

We think it will bring the THD+N believers (Right not we are at -115 THD+N I see only 2 dacs in the world measuring better) to agree with SQ ones. We want the new DAC to unite the 2 opposing camps .Designed for SQ and no distortion 20db under hearing threshold.. price rather on the lower side. A revolution in every sense of the word :-)
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VOLUMIO soundcheck invitation for Hamburg, Germany

Postby SanjeevM » Mon Jul 15 2019 03:36

Great !!
RPi3B+ / Katana THD on IFI Adapter / 7in Waveshare Screen / TPA3255 Class-D on MW LRS-350-48 / Paradigm Monitor 11;
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VOLUMIO soundcheck invitation for Hamburg, Germany

Postby judydudi » Tue Sep 03 2019 08:37

Hey music lovers
it's time. summer vacation ends and we like to go on with our soundimprovements :)

So, this is the invitation for the next soundcheck in beautifull Hamburg, germany on september, 26 8pm.

We like to hear these great boards:

01 allo: Katana and Isolator 1.2
02 Orchard Audio: PecanPi DAC streamer
03 Volumio: 'Primo' (on Tinkerboard S)
04 Khadas: generic tone board USB DAC
05 OSA electronics: DACBerry pro+ with osa isolator board
06 Collybia: Mamboberry HD DAC+ Crystek v2
07 abacus: AroioDac
08 IQaudio: PI DAC PRO

We will have two rounds, first all played with allo 5V3A psu (or with player shipped psu),
second all with ultra low noise linear psu.
Many thanks to Oriol from OSA electronics to give the Soundcheck his brand new developed ULPS1225A Dual Ultra Low Noise Linear Power Supply.
It's available in 5V,9V and 12V.

The setup is improved again. We are using the cambridge audio 651W amp, 8 line RCA switch from dodocus, ELAC FS78 and ELAC BS244.3 speaker.
The rca signal line is less a meter including the switch.

so it's free to come. just write an email to linux @ kompage.de to register and getting more information...

Soundcheck is an independent and non profit association of HI-FI enthusiasts, gathering together to evaluate with double-blind methodology several Audio equipments. (typically I2S hats for Raspberry PI)
Many thanks to all supporters, to make this soundcheck as great as it is!
(Orchardaudio, allo, collybia, osa and last but not least volumio)

we heard in the past:
DAC:TauDAC-DM101 with TauOUT-TP101, Dial-DAC, HIFI Shield & HIFI Shield2, SabreBerry Z, JustBoom DAC HAT, Terraberry Dac 2, ApplePi, Curryman DAC
PSU: Raspberry, allo 5V3A, allo Dual, ifi Ipower, SBooster, Thel NT-25HQ-09, MamboPower
Reclocker: Kali, ApplePi Reclocker, 3R USB Renaissance, iFi iPurifier2
USB-DAC: iFi nano ione, Elac EA101EQ-G
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VOLUMIO soundcheck invitation for Hamburg, Germany

Postby SanjeevM » Sun Sep 08 2019 13:50

Attaboy Judy !! 《Thumbs up》
RPi3B+ / Katana THD on IFI Adapter / 7in Waveshare Screen / TPA3255 Class-D on MW LRS-350-48 / Paradigm Monitor 11;
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VOLUMIO soundcheck invitation for Hamburg, Germany

Postby Girafenaine » Sun Sep 08 2019 16:37

Hello,

I would like to thanks Jens and checksound followers for their beautiful quest for the musical pleasure through shared blind tests.

I like the way you told the community that you could not make a big difference between PSU (in the hifi system you used). I would like to ask a question, after having read all your last years results. Among the cheapest DAC boards stands the IQAudio Pi-DAC PRO with kind of solid comments. It is often compared to more expensive DACs, depending on hears and hifi systems. There are also Allo Boss 1.2 (but without headphone output), DACBerry One+, DACBerry Pro+, MamboBerry HD DAC+, and all of these except the IQAudio Pi-DAC PRO seem to have "master mode" with their own clocks.

This makes me wonder about clock mode (asynchronous, master or slave). IQAudio Pi-DAC seems not to have its own clock and therefore works in slave mode, using the raspberry pi time data. It has good results among "master mode DAC" with their own clocks onboard. So it seems that either :
    - RPI clock is not as bad as it can be written in sound forums... and as a consequence slave mode on RPI could perform as well as master mode and their "super precise onboard clock".
    - RPI clock is not as precise as DAC onboard clocks, but one's hear cannot make any difference. And here again slave mode on RPI is a good deal.
    - IQAudio sounds good because its components and system are very good, and it can elaborate a well done analogic output even if it has less precise time data. In this case, it could perhaps become a step better if given a reclocked signal, through a board like Allo Kali.

What do you think about that clock question ? Did you ever notice that the IQAudio could miss some "precise onboard clock" ? Should the DAC board makers concentrate their attention on other components that these clocks ?

Girafenaine
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VOLUMIO soundcheck invitation for Hamburg, Germany

Postby mruano » Mon Sep 09 2019 02:07

judydudi wrote:
allo wrote:Those new AMPs look amazing , very revealing . Lets see how they sound.
yes I am also curious about the new digital amplifiers, but

Guys, I'd like to let you know that I've found the right amp for my future DAC board soundchecks.
I am now the proud owner of a Cambridge audio azur 651w.

In addition, I have decided to make modifications to the amplifier.
Mr. Horwege did that for me. About 60 components were replaced.
Now, the amplifier brings the sound into the room with a great clarity, fast, effortless and with beautiful timbres, just as the sound is :)
So it sounds better than anything I had before.
I'm looking forward to the next soundchecks... again focused on the I2S volumio devices.


Hi, Judy

May I ask you what's your setup for the Azur 651W? Do you use a preamp? And what speakers?

Thanks and regards,

Miguel
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