Musician Audio Pegasus R2R DAC | Page 52 | Headphone Reviews and Discussion - Head-Fi.org

bouscadie · Dec 29, 2021 at 2:28 PM

Oh yes ! at my house, I and I also award him this prize, without possible objection

wric01 · Dec 29, 2021 at 10:27 PM

Amazing upgrade on my cheap Draco with fuses, cheap 20$ aucharm nano gold silver nano fuse with silver coil = Instant detectable audio boost. 50%of hissing tingling air tremble is removed immediately.

ekjellgren · Dec 30, 2021 at 8:15 AM

T 1000 said:
I would be surprised if the Pegasus sounds like a twice as expensive Pontus, but the almighty Ares II may be even better

In Europe prices are more similar, €1300 for the Pegasus and €1860 for the Pontus II.

bouscadie · Dec 30, 2021 at 9:36 AM

if there is one place where the prices have little relation to the quality of the result, it is the audio! in any case it is my experience.
Tchin, to your health.

kfotheringham · Dec 30, 2021 at 2:57 PM

wric01 said:
Amazing upgrade on my cheap Draco with fuses, cheap 20$ aucharm nano gold silver nano fuse with silver coil = Instant detectable audio boost. 50%of hissing tingling air tremble is removed immediately.

I’m in the UK, but would you mind sharing the link for the fuses? I also have the Draco (sorry if this is a derail). Seems like a small investment to try for audio improvement which is welcome in this hobby.

ecc35 · Jan 2, 2022 at 9:58 PM

Hi, anyone tried RPI4 via USB to Pegasus? Does it work? Would like to try R2R dac but not keen in adding a DDC.

clark8888 · Jan 5, 2022 at 9:26 AM

ecc35 said:
Hi, anyone tried RPI4 via USB to Pegasus? Does it work? Would like to try R2R dac but not keen in adding a DDC.

my Pegasus is fine to run with usb of pi4, macOS and windows. on Mac only 32bit can be choosen

Zaurux · Jan 5, 2022

clark8888 said:
my Pegasus is fine to run with usb of pi4, macOS and windows. on Mac only 32bit can be choosen

The Pegasus works very well with my Allo USBridge (rpi cm3) but not with the RPI4 I just bought.
I have tried several distributions... nothing to do, the USB does not lock.
I have updated the eprom of the RPI4... nothing.
Here is the log under DietPi :

Code:

root@DietPi:~# dmesg|grep USB
[    0.701634] xhci_hcd 0000:01:00.0: new USB bus registered, assigned bus number 1
[    0.702606] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.10
[    0.702613] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    0.702945] hub 1-0:1.0: USB hub found
[    0.703356] xhci_hcd 0000:01:00.0: new USB bus registered, assigned bus number 2
[    0.703365] xhci_hcd 0000:01:00.0: Host supports USB 3.0 SuperSpeed
[    0.703569] usb usb2: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 5.10
[    0.703575] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    0.703859] hub 2-0:1.0: USB hub found
[    0.709577] usbhid: USB HID core driver
[    0.963227] usb 1-1: new high-speed USB device number 2 using xhci_hcd
[    1.113882] usb 1-1: New USB device found, idVendor=2109, idProduct=3431, bcdDevice= 4.21
[    1.113890] usb 1-1: New USB device strings: Mfr=0, Product=1, SerialNumber=0
[    1.113896] usb 1-1: Product: USB2.0 Hub
[    1.115068] hub 1-1:1.0: USB hub found
[    1.415238] usb 1-1.3: new high-speed USB device number 3 using xhci_hcd
[    1.520154] usb 1-1.3: New USB device found, idVendor=152a, idProduct=8829, bcdDevice= 3.12
[    1.520165] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[    1.520170] usb 1-1.3: Product: USB HiRes Audio
[    2.869119] usb 1-1.3: USB disconnect, device number 3
[    3.099249] usb 1-1.3: new high-speed USB device number 4 using xhci_hcd
[    3.204148] usb 1-1.3: New USB device found, idVendor=152a, idProduct=8829, bcdDevice= 3.12
[    3.204176] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[    3.204182] usb 1-1.3: Product: USB HiRes Audio
[    3.893112] usb 1-1.3: USB disconnect, device number 4

... and more and more but no locking

"New USB device found, idVendor=152a, idProduct=8829, bcdDevice= 3.12" is the Pegasus

But...
I have just tried using a hub (Anker USB3) between Dac / RPI4 ... and it works !! :rolling_eyes:

A problem with the last RPI4 batch ?

sajunky · Jan 5, 2022 at 10:27 AM

Yip, looks like. You can also try USB 2.0 hub. Better than 3.x, less noisy.

ecc35 · Jan 5, 2022 at 5:51 PM

clark8888 said:
my Pegasus is fine to run with usb of pi4, macOS and windows. on Mac only 32bit can be choosen

Thanks for the confirmation.

ecc35 · Jan 5, 2022 at 5:54 PM

Zaurux said:

The Pegasus works very well with my Allo USBridge (rpi cm3) but not with the RPI4 I just bought.
I have tried several distributions... nothing to do, the USB does not lock.
I have updated the eprom of the RPI4... nothing.
Here is the log under DietPi :

Code:

root@DietPi:~# dmesg|grep USB
[    0.701634] xhci_hcd 0000:01:00.0: new USB bus registered, assigned bus number 1
[    0.702606] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.10
[    0.702613] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    0.702945] hub 1-0:1.0: USB hub found
[    0.703356] xhci_hcd 0000:01:00.0: new USB bus registered, assigned bus number 2
[    0.703365] xhci_hcd 0000:01:00.0: Host supports USB 3.0 SuperSpeed
[    0.703569] usb usb2: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 5.10
[    0.703575] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    0.703859] hub 2-0:1.0: USB hub found
[    0.709577] usbhid: USB HID core driver
[    0.963227] usb 1-1: new high-speed USB device number 2 using xhci_hcd
[    1.113882] usb 1-1: New USB device found, idVendor=2109, idProduct=3431, bcdDevice= 4.21
[    1.113890] usb 1-1: New USB device strings: Mfr=0, Product=1, SerialNumber=0
[    1.113896] usb 1-1: Product: USB2.0 Hub
[    1.115068] hub 1-1:1.0: USB hub found
[    1.415238] usb 1-1.3: new high-speed USB device number 3 using xhci_hcd
[    1.520154] usb 1-1.3: New USB device found, idVendor=152a, idProduct=8829, bcdDevice= 3.12
[    1.520165] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[    1.520170] usb 1-1.3: Product: USB HiRes Audio
[    2.869119] usb 1-1.3: USB disconnect, device number 3
[    3.099249] usb 1-1.3: new high-speed USB device number 4 using xhci_hcd
[    3.204148] usb 1-1.3: New USB device found, idVendor=152a, idProduct=8829, bcdDevice= 3.12
[    3.204176] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[    3.204182] usb 1-1.3: Product: USB HiRes Audio
[    3.893112] usb 1-1.3: USB disconnect, device number 4

... and more and more but no locking

"New USB device found, idVendor=152a, idProduct=8829, bcdDevice= 3.12" is the Pegasus

But...
I have just tried using a hub (Anker USB3) between Dac / RPI4 ... and it works !! :rolling_eyes:

A problem with the last RPI4 batch ?

Thanks for the info. My RPI4 is not new. Hope it will not have the same problem.

clark8888 · Jan 6, 2022 at 9:02 AM

Zaurux said:

The Pegasus works very well with my Allo USBridge (rpi cm3) but not with the RPI4 I just bought.
I have tried several distributions... nothing to do, the USB does not lock.
I have updated the eprom of the RPI4... nothing.
Here is the log under DietPi :

Code:

root@DietPi:~# dmesg|grep USB
[    0.701634] xhci_hcd 0000:01:00.0: new USB bus registered, assigned bus number 1
[    0.702606] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.10
[    0.702613] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    0.702945] hub 1-0:1.0: USB hub found
[    0.703356] xhci_hcd 0000:01:00.0: new USB bus registered, assigned bus number 2
[    0.703365] xhci_hcd 0000:01:00.0: Host supports USB 3.0 SuperSpeed
[    0.703569] usb usb2: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 5.10
[    0.703575] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    0.703859] hub 2-0:1.0: USB hub found
[    0.709577] usbhid: USB HID core driver
[    0.963227] usb 1-1: new high-speed USB device number 2 using xhci_hcd
[    1.113882] usb 1-1: New USB device found, idVendor=2109, idProduct=3431, bcdDevice= 4.21
[    1.113890] usb 1-1: New USB device strings: Mfr=0, Product=1, SerialNumber=0
[    1.113896] usb 1-1: Product: USB2.0 Hub
[    1.115068] hub 1-1:1.0: USB hub found
[    1.415238] usb 1-1.3: new high-speed USB device number 3 using xhci_hcd
[    1.520154] usb 1-1.3: New USB device found, idVendor=152a, idProduct=8829, bcdDevice= 3.12
[    1.520165] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[    1.520170] usb 1-1.3: Product: USB HiRes Audio
[    2.869119] usb 1-1.3: USB disconnect, device number 3
[    3.099249] usb 1-1.3: new high-speed USB device number 4 using xhci_hcd
[    3.204148] usb 1-1.3: New USB device found, idVendor=152a, idProduct=8829, bcdDevice= 3.12
[    3.204176] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[    3.204182] usb 1-1.3: Product: USB HiRes Audio
[    3.893112] usb 1-1.3: USB disconnect, device number 4

... and more and more but no locking

"New USB device found, idVendor=152a, idProduct=8829, bcdDevice= 3.12" is the Pegasus

But...
I have just tried using a hub (Anker USB3) between Dac / RPI4 ... and it works !! :rolling_eyes:

A problem with the last RPI4 batch ?

I only tried Moode DLNA and NAA image to reach pcm1536khz and dsd1024 by PGGB and HQplayer. It's difficult to update DietPi from China.

clark8888 · Jan 6, 2022 at 9:32 AM

sajunky said:
Nope. It can only make sound worse. Topping input impedance is extremely low, people should be aware of that. It is below 2kOhm if I remember correctly, it should be close to 100kOhm on XLR. When paired with Pegasus you can expect high frequency roll off, increasing distortions, as ladder is overloaded by low input impedance of the preamp.

In addition, it is nested lopback opamp design, it measure well, but will react poor to the high frequency components coming out of a ladder. For a ladder DAC like this, Class A discrete amplifier is better, or a tube.

My Topping A90 works fine with Pegasus without anything wrong no matter for headphone or speaker

okan · Jan 6, 2022 at 10:27 AM

sajunky said:
Nope. It can only make sound worse. Topping input impedance is extremely low, people should be aware of that. It is below 2kOhm if I remember correctly, it should be close to 100kOhm on XLR. When paired with Pegasus you can expect high frequency roll off, increasing distortions, as ladder is overloaded by low input impedance of the preamp.

In addition, it is nested lopback opamp design, it measure well, but will react poor to the high frequency components coming out of a ladder. For a ladder DAC like this, Class A discrete amplifier is better, or a tube.

I have flux fa-10. In the specifications it says 10KOhm input impedance. Would it be an issue with pegasus? To my ear, it sounds very good and I am very happy with the current setup.

sajunky · Jan 6, 2022

okan said:
I have flux fa-10. In the specifications it says 10KOhm input impedance. Would it be an issue with pegasus? To my ear, it sounds very good and I am very happy with the current setup.

FA-10 is very good amp and 10k Ohms is only marginal below standard, I didn't hear pairing problems with Denafrips/Musicians.

This is on SE input. An impedance of balanced input is far more substandard, I wouldn't recommend with Denafrips/Musicians. You can try, it wan't do any damage, report back.

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