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[#1] Lumin U-1 問題    
我見到Lumin U-1 的規格描述為:

Digital Output:
2x USB:
DSD256, 11.2MHz, 1bit, Stereo
PCM 44.1khz–384kHz, 16–32bit

Input:
2x USB storage, flash drive, USB hard disk (Single-partition FAT32, NTFS and EXT2/3 only)

請問究竟Lumin U-1後面的2個USB port 係用作 Digital output 接 DAC 還是用來插外置Harddisk 播 music file? THX
MM622
個人訊息 會員
123.xxx.xxx.27
2018-03-25 02:21
[#2] Lumin U-1 問題    
Lumin U1 USB port can be used to output digital audio to one USB DAC. (Unlike other Lumin player models.)

It can also be used for USB storage, similar to other Lumin player models.

Therefore, it is possible to use one USB port for USB DAC, and the other port for USB storage. However, it's best to use network (music file from NAS) for input instead of playing from USB HDD.

最後修改時間: 2018-03-25 09:53:33
wklie
個人訊息 會員
123.xxx.xxx.15
2018-03-25 09:51
[#3] Lumin U-1 問題    
Thanks! It mean I can use U-1 USB port to connect a CDP like Esoteric K-1 or K-01XS and use these CDP'S internal DAC to play music files?

Is there any sound quality difference if I use coaxial from U-1 vs S-1 digital out to a CDP? Which mean I use my CDP's DAC to play music files.

Because I already have S-1, unless the USB digital out from U-1 sound much better than S-1's coaxial digital out. Otherwise there is no meaning for me to get a U-1 to replace my S-1.
MM622
個人訊息 會員
49.xxx.xxx.116
2018-03-25 11:59
[#4] Lumin U-1 問題    
Yes, Lumin U1 USB output is compatible with Esoteric K1, K-x series, K-xs series and N series USB input.

The primary advantage over coaxial is the possibility to play DSD / DSD128 / DSD256.

Older Esoteric models may not support DoP over coaxial.

最後修改時間: 2018-03-25 17:13:38
wklie
個人訊息 會員
123.xxx.xxx.15
2018-03-25 17:13
[#5] Lumin U-1 問題    
Do you mean S-1’s coaxial digital output and Esoteric USB input cannot pay DSD/DSD128/DSD 256 files? Only USB port can?
MM622
個人訊息 會員
123.xxx.xxx.27
2018-03-25 21:31
[#6] Lumin U-1 問題    
Why is NAS better than USB HDD?
geekee
個人訊息 正式會員
219.xxx.xxx.27
2018-03-25 21:36
[#7] Lumin U-1 問題    
#5: Regardless of brand, it is rather common for a USB DSD DAC to support DSD only via USB but not via SPDIF. Newer Esoteric models do.
wklie
個人訊息 會員
123.xxx.xxx.15
2018-03-25 22:53
[#8] Lumin U-1 問題    
#6:
a. user reports
b. Ethernet has much better isolation than USB
c. 2.5" USB HDD draw power from Lumin
d. Vibration and electrical noise
e. In case of USB output to USB DAC, using the USB HDD means the USB bus is shared for both tasks
wklie
個人訊息 會員
123.xxx.xxx.15
2018-03-25 23:00
[#9] Lumin U-1 問題    
Thanks wklie!
geekee
個人訊息 正式會員
219.xxx.xxx.27
2018-03-26 10:19
[#10] Lumin U-1 問題    
wklie!

There are 2 X USD port in Lumin U1, can I connect U-1 (USB-1) to my CDP and another USB port (USB-2) to an external DAC? Which mean I have two choices to get different sound through my CDP and external DAC. THX.
mm622
個人訊息 會員
218.xxx.xxx.9
2019-02-28 12:01
[#11] Lumin U-1 問題    
No. Only one USB DAC can be connected to U1 or U1 MINI. Either USB port can be used for USB DAC connection but not both.

Unlike USB output, the other digital outputs: AES / BNC / RCA / Toslink can be simultaneously connected to 4 DACs.

最後修改時間: 2019-02-28 13:50:07
wklie
個人訊息 會員
115.xxx.xxx.66
2019-02-28 13:48
[#12] Lumin U-1 問題    
#5
Esoteric K01x/K03x/K01xs/K03xs can play DSD files via DoP over coax. K01/K03 cannot.

I am using K03x and previously K03 so am sure K03x works.

I heard people said that for the same streamer and DAC, coax sounds better than USB because USB was not designed for CAS, contains a lot of handshaking protocal signal hence is very noisy. SPDIF (coax and AES) is pure digital transmission with no added protocal so sounds better.

I'm happy to hear chings sharing your experience on this.

Happy listening :)
MLfans
個人訊息 會員
165.xxx.xxx.99
2019-03-06 13:24
[#13] Lumin U-1 問題    
#5 Thanks for the info on Esoteric models.

I received more reports of AES sounding better than USB in the same hardware setup, than the opposite. So I'm not surprised in some setups coaxial may sound better than USB too.

However, for those who need to play DSD128, USB is required.

最後修改時間: 2019-03-06 14:45:18
wklie
個人訊息 會員
115.xxx.xxx.66
2019-03-06 14:43
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