北京道 一 號 1PekingRoad - Notes of an Audiophile |
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回覆 (907): Phono Battle of the Year 2014
Converting from 120V to 220V is very easy!  
 
Good luck with your search!  
 
 
 
thekong
16-06-17
16:13:38
回覆 (906): Phono Battle of the Year 2014
I believe the ultimate usage of X-Ono is to buy 2-sets of X-Ono.  
 
It is not easy to buy a set of Xono within HK now.  
 
I think I have to search oversea website and convert it from 120v. to 220v. by myself.  
 
thank you!
pNG
16-06-17
16:08:45
回覆 (905): Phono Battle of the Year 2014
I am pretty sure the psu only contain one supply module, so yes, if you connect 2 main units to it, they will have to share the same supply module.  
 
I have compared “one psu + one XVR” to “one psu + 2 XVR” (using only half the function of each XVR) and the latter was much better. Yes, it is certainly possible that “2 psu + 2 XVR” could be even better, but I have not tried that yet.  
 
As there is improvement even with 1 psu driving 2 main units, I believe the psu is really not the weak link, at least when driving only 1 main unit.  
 
With the level of improvement I have experienced with the XVR, as compared to that of the dual Xono setup, I come to believe the improvement is mainly due to the separation of the left and right channels in 2 chassis.  
 
thekong
16-06-17
15:22:43
回覆 (904): Phono Battle of the Year 2014
thekong hing,  
 
Sorry I didn't express myself clearly...  
 
I have read your write-up three times.  
 
My doubt is:  
 
even the original power supply is capable to supply power to TWO modules (e.g. 2-sets X-VR, or 2-sets of X-Ono, or 1 X-VR + 1 X-Ono), I question if the original power supply contains TWO "separated" power supply circuits.  
 
or it just has a SINGLE big power supply circuit to provide power to ONE or TWO modules at the same time?  
 
Did you compare the "ONE psu + TWO main units" VS. "TWO pus + TWO main units" in a system?  
 
Do you know the fact ?  
 
many thanks!  
 
:)
pNG
16-06-17
14:10:57
回覆 (903): Phono Battle of the Year 2014
>If no, when I utilize its TWO DC outputs at the same time, the sounding of each one (e.g. X-ono and X-over) must be worsen greatly.<  
_____________________________________________  
 
Did you actually read what I wrote ?  
 
thekong
16-06-17
13:25:37
回覆 (902): Phono Battle of the Year 2014
Has the original X-ono's power supply unit TWO SEPARATED power supply circuits inside?  
 
If no, when I utilize its TWO DC outputs at the same time, the sounding of each one (e.g. X-ono and X-over) must be worsen greatly.
pNG
16-06-17
13:17:12
回覆 (902): Phono Battle of the Year 2014
I am very skeptical about high price audio cables (interconnect, speaker cable, power cords etc.). Not that I can't hear the difference, but the differences are often just a change of sound,  
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Now you talking la! Agree totally lor. 95% of the components in an audio equipment are PASSIVE. They don't amplify and they don't create. They just take in whatever you give them but the difference begin when some components unfaithfully take away or diminish select frequency.  
 
To me, the only active component in an equipment is the 220V AC and the DC that comes after rectification.
bobui
16-06-17
12:46:25
回覆 (901): Phono Battle of the Year 2014
>using 2-sets of X-Ono implies the original power supply is not good enough. This may be caused by the low grade caps, diode, transformer etc.<  
 
>I don't know why the original power supply unit has TWO DC outputs. Anyone know what its purpose is?<  
__________________________________________________________  
 
As I have mentioned, using a SINGLE power supply with 2 modules of Pass’ active Xover resulted in considerable improvement, so it is not likely that the power supply is the weak link. It is more likely that the active gain stages (of the left and right channels) in the main modules are having interference with each other when sharing the same chassis.  
 
Actually, the Xono and Pass’ active Xover use the same exact power supply, and as mentioned above, there is an option to power 2 Xover modules with one single power supply (of course, you can also use 2 power supplies for 2 main modules), hence the 2 output sockets in the power supply.  
 
I have talked to Pass, and some of their other customer also reported considerable improvement with the Dual Xono setup. However, they also mentioned that since the power supply was designed to power 2 units, it was highly unlikely that it would have trouble powering a single unit.  
 
 
>I guess the original DC cord is for digital signal transference in computer setup, not for DC, it may unable to deliver sufficient current (A). <  
_____________________________________________  
 
Knowing Pass Lab, I think it is very unlikely that the cord is insufficient in delivering the required current! Being said that, while I am not aware of anyone changing the DC cord in the Xono, I have read positive report of using aftermarket cords between the main unit and power supplies of the Aesthetix IO and Callisto. But then, at US$25k per pair, these cords cost about the same as the preamp itself! :-O  
 
Like many members on this forum, I am very skeptical about high price audio cables (interconnect, speaker cable, power cords etc.). Not that I can't hear the difference, but the differences are often just a change of sound, not necessarily improvements. They have their own characters (or you can call it colorations) that may, or may not, fit your system / preference. As a matter of fact, the best sounding systems I have heard all use normal cables.  
 
thekong
16-06-17
12:11:28
回覆 (901): Phono Battle of the Year 2014
Most would think that a DIYer such as bobui is naturally into modification. The brutal truth is.....I really am not. I am totally against modification and tweaks on original equipment unless is a half dead yester-year piece.  
 
Sorry I couldn't be of much help.  
 
bobui
16-06-17
12:11:23
回覆 (900): Phono Battle of the Year 2014
thank you bobui hing and thekong hing!  
 
I think the external DC cord between power supply unit and the phono unit should be the first step to updgrade the X-Ono.  
 
The following is what I am thinking of upgrading X-Ono:  
 
(1) I guess the original DC cord is for digital signal transference in computer setup, not for DC, it may unable to deliver sufficient current (A).  
 
(2) using 2-sets of X-Ono implies the original power supply is not good enough. This may be caused by the low grade caps, diode, transformer etc.  
 
(3) I want to try to make two power supply units for left and right channel individually.  
 
(4) anyone would like to sell his X-ono?  
 
 
BTW, I don't know why the original power supply unit has TWO DC outputs. Anyone know what its purpose is?  
 
Any responses?  
 
Thank you for "high-hand" c-hings' inputs here!
pNG
16-06-17
10:30:56
回覆 (899): Phono Battle of the Year 2014
I would strongly recommend against making any modification to the Xono. If you are interested to try the Dual Xono, just get another one. With the current 2nd hand price, even 2 of them can be considered a bargain comparing to phonos with similar level of performance. Of course, this is assuming you like the basic character of the Xono in the first place.  
 
Also, in case you don't like it, selling it shouldn’t be much of a problem !  
 
thekong
16-06-17
10:00:38
回覆 (898): Phono Battle of the Year 2014
How to locate B+ pin?  
------------------------------------  
 
Wah! You probably the one and only take my word and suggestions serious. Thank you! And if you are serious about disconnecting one of the idle channel power rail. Be it a B+ or B+ and B-. I highly recommend you ask a qualified person to do it for you la.  
 
bobui
16-06-16
22:34:04
回覆 (897): Phono Battle of the Year 2014
#895 bobui c-hing:  
 
"Locate the B+ pin in the circuit board and disconnect the power supply rail of the idle channel"  
 
How to locate B+ pin?  
 
 
 
 
------------------------------------------------------  
 
thank you "thekong" hing and Cadiver hing!
pNG
16-06-16
19:15:35
回覆 (899): Joke of the day
 
 
 
 
Welcome back RALPHY !
evp1312
16-06-16
11:31:01
回覆 (898): Joke of the day
Ha ha!  
 
Can we have Emoji in this forum please?
bobui
16-06-16
09:54:43
回覆 (897): Joke of the day
 
 
 
 
 
 
 
 
 
LITTLE RALPHY ON MATH (Part 1)  
 
 
 
A teacher asks her class, 'If there are 5 birds sitting on a fence and you shoot one of them, how many will be left?'  
 
She calls on little Ralphy.  
 
 
 
He replies, 'None, they will all fly away with the first gunshot.'  
 
 
 
The teacher replies, 'The correct answer is 4, but I like your thinking.'  
 
 
 
Then little RALPHY says, 'I have a question for YOU.  
 
 
 
There are 3 women sitting on a bench having ice cream:  
 
 
 
One is delicately licking the sides of the triple scoop of ice cream.  
 
The second is gobbling down the top and sucking the cone.  
 
 
 
The third is biting off the top of the ice cream.  
 
Which one is married?'  
 
 
 
The teacher, blushing a great deal, replied, 'Well, I suppose the one that's gobbled down the top and sucked the cone.'  
 
 
 
To which Little RALPHY replied, 'The correct answer is 'the one with the wedding ring on,' but I like your thinking.'  
 
 
 
 
 
 
 
 
kris
16-06-16
09:02:36
回覆 (896): Phono Battle of the Year 2014
Hopefully without the need to bring in the soldering iron.  
____________________________________________________  
 
Those won't be needed, I prefer wire cutters
Derek2A3
16-06-15
17:07:26
回覆 (895): Phono Battle of the Year 2014
Actually, that was what prompted us to try the Dual Xono setup!  
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Locate the B+ pin in the circuit board and disconnect the power supply rail of the idle channel. Further improvement likely la! Derek can identify the where about without problem la. Hopefully without the need to bring in the soldering iron.  
 
bobui
16-06-15
13:43:16
回覆 (894): Phono Battle of the Year 2014
Yes, the connection as Cadiver has stated.  
 
The first thing that comes to most people’s mind would probably be the doubling up of the power supplies. However, I think there is something more than that going on!  
 
I was using a 1 module, 1 ps, Pass Lab active Xover for 2 ways Xover. Since I planned to go 3 ways, I got another module with no extra ps. While I didn’t see any reason in doing so, Derek2A3 insisted that I tried the dual mono set up, using only half of each module, and sharing 1 single ps. To my surprise, there was considerable improvement! Actually, that was what prompted us to try the Dual Xono setup!  
 
So, I think there has nothing to do with the ps in this case, but the 2 channels’ amplification stages having some interference with each other when sharing a single chassis!  
 
thekong
16-06-14
16:11:36
回覆 (894): Phono Battle of the Year 2014
 
PnG c-hing,  
 
Unfortunately, I don't know anything about anything phono ... I won't be the authority to recommend. My gut feel is it won't be the same. It's the purist idea of having totally separated everything rather than share power supply even when it's dual mono. Like the Vendetta, there are 2 separated power supply, separated power cord, etc. I think they derive the concept from such. But you feel free to try and let the group know how it works out. Thats the sprit of PK1 !
Cadiver
16-06-14
16:05:48
回覆 (893): Phono Battle of the Year 2014
Cadiver c-hing,  
 
thanks for your reply!  
 
I also guess " thekong" c-hing is to separate the left-right channels by using two sets of XONO.  
 
IMHO, this setup (i.e. 2-sets of XONO) implies the original power supply is not powerful enough to drive the main unit.  
 
Therefore, I am thinking of upgrading the power capacitors of my XONO's power supply by replacing with larger uF capacitors.  
 
Will my idea bring the similar results as using two sets of XONO?  
 
Thank you!
pNG
16-06-14
12:11:49
回覆 (892): Phono Battle of the Year 2014
 
From what I understand, left channel to left channel of the first Xono and right channel to the left channel of the second Xono. So essentially only use 1/2 an Xono at any given time believe to have more concentrated power source to supply only 1 channel. This configuration supports 2 cartridges, interesting idea. I have not had the luxury to hear an A/B comparison. The Xono is pretty awesome!
Cadiver
16-06-14
01:50:04
回覆 (891): Phono Battle of the Year 2014
the Kong c-ching...  
 
post #890:  
 
Could u pls explain how to connect your double-up XONO to single cartridge?  
 
And please share the sonic differences between single-unit and double-units.  
 
thank you
pNG
16-06-13
23:38:57
回覆 (1026): david vs goliath
http://www.theguardian.com/uk-news/2016/may/10/police-apologise-for-allahu-akbar-use-in-mock-manchester-attack
evp1312
16-05-11
22:12:32
回覆 (1025): david vs goliath
 
In the foreseeable future, there may be a Muslim Brit PM.
kh33
16-05-09
11:29:27
回覆 (1024): david vs goliath
 
 
Sadiq Khan victory is huge deal since Zac Goldsmith daddy is Sir James Michael "Jimmy" Goldsmith, a member of the Jewish billionaire tycoon publisher conglomerate which controls 96% of the world's media!  
 
 
 
 
Jimmy Goldsmith  
 
 
 
http://tapnewswire.com/2015/10/six-jewish-companies-control-96-of-the-worlds-media/
kris
16-05-09
08:31:12
回覆 (1023): david vs goliath
 
 
Tory Zac Goldsmith  
https://www.yahoo.com/news/britain-awaits-results-super-thursday-votes-002442687.html
kris
16-05-09
07:49:39
回覆 (1022): david vs goliath
 
 
 
Son of a Pakistani bus driver, against the son of a Jewish multibillionaire Tory Zac Goldsmith......and now Mayor of London.  
 
Congratulation to Sadiq Khan!
kris
16-05-09
07:43:50
回覆 (1021): 北京道一號
 
 
Dearest Gan,  
 
I think of you often and bragged about your WAMM still! Speaking of which, managed to visit Tony Tsui's Magico Q7 last year and hopefully make it to your den soon.  
 
And on music den, I spent a good part of 2015 trying to get my Studio project moving forward without much success, I reflect on this failure quite often at golf and during other adult recreations. And limage constant bragging, yet again, on his room achievement may have caused permanent damage on my motivation. Pondering now whether I should just move in with him.  
 
On a musical note, I started my early morning listening sessions again after almost 5 years of silence. The initial reaction is that I find myself quite alert on the music, not so much the "hi-fi" aspect, but the intent of the performer touches me deeply (love listening to solo pieces of Corea and Jarrett at 5:30 am!). In addition, to celebrate the "music", I've recently acquired a complete set of Nelson Pass's First Watt rig and pair of Audio Note Hemp speakers - a deadly combo!  More on that later when I come to my senses.  
 
 
With that, my warmest blessings to our good friends in Malaysia!
kris
16-02-08
12:20:07
回覆 (1020): 北京道一號
 
 
 
祝各北京道同好, 百事亨通, 萬事如意, 身體健康!
kris
16-02-08
11:59:51
回覆 (1019): 北京道一號
 
To Kris, Limage sifu & all my dear friends,  
 
A happy & prosperous Monkey Year - 2016  
Stay healthy...... always  
Everyday good sound....  
Gong Xi Fa Cai  
 
 
 
 
Gan
16-02-06
11:09:40
回覆 (1018): 北京道一號
R.I.P Master Tan, You're like Father to me, We always remember You!
https://www.flickr.com/gp/[email protected]/wG9sCg
Strad119
15-09-04
23:57:24
回覆 (1018): 北京道一號
He just want us to remember the good old days with him and his crazy audio tweaking.  
_______________________________________________________________  
 
We will. May he rest in peace.
Derek2A3
15-09-04
17:01:26
回覆 (1017): 北京道一號
 
 
Dr. Tan would be remembered within our hearts. May he rest in peace.  
 
 
limage
15-09-04
12:01:10
回覆 (1016): 北京道一號
Message from Master Bill Ying:  
 
Dr Tan 譚大夫 (one of the founders of Shun Mook 神木)passed away peacefully yesterday Sept 3rd at the age of 80. His wishes were simple, he will to be cremated and his ashes placed in his beloved music room. The music room will remain as is.  
 
There will be no funeral or any ceremony and no need to send flowers. He just want us to remember the good old days with him and his crazy audio tweaking.
daiwok
15-09-04
10:57:15
回覆 (1015): 北京道一號
Arian 真係好靚仔,恭喜!恭喜!
nicknick
15-02-23
09:49:51
回覆 (1014): 北京道一號
 
 
Kris,  
Welcome to Malaysia. You must try to drop by KL while visiting Bangkok. We will be waiting for your arrival. See you soon...  
 
Gan
15-02-21
14:12:37
回覆 (1013): 北京道一號
恭喜 Colin,  
 
BB 的學行車是否用單車代替 :-)  
Tony88
15-02-21
13:23:06
回覆 (1012): 北京道一號
Arian 好靚仔,恭喜!恭喜!
Vash
15-02-20
13:05:03
回覆 (1012): 北京道一號
 
 
Popeye, so....that's why you've been busy. What a smart looking boy (the baby!).  
 
ps: we miss you dearly!
kris
15-02-20
13:04:36