XXHighEnd - The Ultra HighEnd Audio Player
September 21, 2014, 04:06:46 am *
Welcome, Guest. Please login or register.
Did you miss your activation email?

Login with username, password and session length
News: Dec. 31, 2012 : XXHighEnd + Phasure NOS1 DAC receive 6moons Blue Moon Award !
** "Lonely at the very top" **
Search current board structure only !!  
   Home   Help Search Login Register  
Pages: [1] 2 3 4 5 6 7 8 9 10
 1 
 on: September 21, 2014, 12:49:41 am 
Started by christoffe - Last post by christoffe
Hi,

Interview and two videos about cables from a technical aspect:

http://www.audioholics.com/gadget-reviews/speaker-cable-and-audio-interconnects

Joachim

 2 
 on: September 21, 2014, 12:40:18 am 
Started by christoffe - Last post by CoenP
Hi there,

So how did the 50/50's sound? well when I first connected them they sounded very impressive - coherent good timing etc etc very impressive. But then after extended listening I started to tire of them. They really did not sound right at all. There is grey, dry sound which I find really irritating. They also introduce a harshness to the sound. Maybe they need running in - I have only given them 30 hours or so but I do not hold out much hope that they are going to end up with a permanent place in my system. But anyway IMHO a decent i/c needs virtually no running in.

When I put my usual interconnects back in my system the sound regained its colour and natural warmth - the kind of sound that could keep me up all night (if I was allowed!!).

This could have been my post.

Since my amps were slammed together as an interim experiment,  I had been busy first with regular maintenance and debugging on the power amp. I had to do some noise fighting and component tweaks and the result is worthwhile. Now I wanted to get used to this sound first before trying the 50 ohm cables.

I test drove the BNCs on my regular (low end) CD player and this was just unlistenable. Just like the RG58 cable I had fabricated with RCAs myself a long time ago. They fared a lot better on the NOS1a. Quite a drastic departure from the sound I am used to. There is a certain extra speed and clearness about the sound that is attractive, but the music is robbed from its soul and like Paul I am experiencing listening fatigue (irritation as result of hardness and lack of tone).

I'm afraid the BNC cable is never gonna fly in my system. Nothing lost though it was a too cheap tweak not to try.

regards, Coen

 3 
 on: September 20, 2014, 10:58:47 pm 
Started by christoffe - Last post by Scroobius
I waited before trying the 50 coax 50 bnc interconnects in my system. I simply wanted to get used to my new speakers using familiar components including the (rather special IMHO) interconnects I use. These interconnects I have used for a few years and nothing else I have tried comes close. A couple of years ago I went to a hi-fi dealer (he bought my mono block SET amps) - my interconnects embarrassed every other interconnect he had to hand including some very expensive.. They have been absolutely fundamental to getting good sound quality in my system since I first tried them.

So how did the 50/50's sound? well when I first connected them they sounded very impressive - coherent good timing etc etc very impressive. But then after extended listening I started to tire of them. They really did not sound right at all. There is grey, dry sound which I find really irritating. They also introduce a harshness to the sound. Maybe they need running in - I have only given them 30 hours or so but I do not hold out much hope that they are going to end up with a permanent place in my system. But anyway IMHO a decent i/c needs virtually no running in.

When I put my usual interconnects back in my system the sound regained its colour and natural warmth - the kind of sound that could keep me up all night (if I was allowed!!).

Peter - you were using 75ohm coax i/c's and now you are using 50/50 coax. Personally I think that is a fairly limited comparison. Have you tied other interconnects in your current system?

I have not finished comparisons yet but that is the way it is looking so far.

Cheers

Paul

 4 
 on: September 20, 2014, 10:35:34 pm 
Started by christoffe - Last post by Scroobius
Quote
So Paul, can you try to explain why you seemed so surprised about no earth connection anywhere ?

I am not sure I was that surprised there is no earth connection in your system. It was simply that I lost track and wanted to know what your earth connections were. When the topic of earth connections originally came up I followed it closely. I tried disconnecting earth's as discussed in the topic but it had absolutely no effect on sound quality in my system at all. So I did not pursue it and lost track of where your system got to. But I did end up by trial and error finding an earth arrangement that really worked well and reduced noise in my system down to tiny levels and that helped SQ a lot.

With house earth being a big aerial bringing all sorts of sh*** into the system not having it connected does have its attractions. But what about the safety implications assuming that the case say of your PC is not connected to PE (have I got that right?).

My system has a dedicated earth via a spike in the garden maybe that helps - anyway these 118dB horns have virtually no noise at all - I was really surprised at just how quiet they are.

Cheers

Paul






 5 
 on: September 20, 2014, 05:10:34 pm 
Started by christoffe - Last post by christoffe
Continuation from Reply # 8  after listening sessions from today (with variation C):

1)   Better 3D-image of the recording studio/concert hall
2)   Better definition/resolution (tone colour/timbre) of all instruments and voices. The “refined” timbre is AMAZING!!!
3)   Bass not that “tight” anymore (or “nearer to live”?)
4)   Off axis listening again possible

Test CD’s:

- “Touch” from Yello (a lot of bass)
- “M˛” from Marcus Miller (a lot of bass)
- “Kind Of Blue” From Miles Davis (brass instruments)
- “Tenderness” from Al Jarreau
**“The Chick Corea Songbook“ from The Manhatten Transfer**

This is the best SQ I ever heard in my room. Happy Happy

If some of the NOS1a owners has the chance to test this combination it is worth an test attempt.

Joachim

P.S. Our audio system is connected to the mains without any refinement.

 6 
 on: September 20, 2014, 04:28:37 pm 
Started by christoffe - Last post by PeterSt
Well, this appears not so easy for me;
The (only) laptop I have here has only 1GB of memory which a.o. means that I can't use a RAMDisk, which is a requirement (for playing music in well (fast) fashion over the LAN.

But then I thought : let's hook up the analyser once I have it all installed and all anyway. And now I see some strange things ...
Notice : the laptop runs on batteries.

Further environmental stuff which could be related :

- Windows 8.1.
- A possible not the best ground relation with the analyser, *because* of the laptop not being hooked up to the mains.
- Analyser is in the same ring as audio.

First thing : the noise line (no playing) is not as straight and as low as that I am used to. However, a longer time ago I have seen this as well, but with the notice that the analyser itself was hooked up to the laptop (so the analysis ran on the laptop) and then too I ran it on batteries for the (test) purpose. Normally it's hooked up to a W7 machine. I regard this unimportant and "just so" (ahum, but see below).

The second thing though I have never seen before. This could be crucial, because there's something else I never understood much. This is :

Normally, at playing a test signal, there's something which looks like "heating up" and it causes the noise line to rise during playing. This starts after a minute or so after switching on the DAC but it is *also* related to the time the test signal plays. To summarize this in short : After a rest the noise is low and on par regarding "my" standards, but in a minute it starts to rise. Next, after a while it will reset and the frequency of this noise going up and down is predictable. Notice though that I am not talking about piles of noise - only a few dB (at -120dB or so).
And now, with the laptop on batteries this happens the other way around ... Noise starts out as how I'm used to, but now it DROPS.

Other data : Such thing as the rising noise started to happen since the USB interface, and with the first NOS1 version I never saw that.

So what can this ever be ?

What I have been thinking about before, but now do more, is that "noise oscillation" is happening. Don't ask me how it is possible that you can set your clock to it, but this possibly is related to how it can reset. So, this can be done by Stop - Play, but it *also* happens when the test signal has come to an end and "connects" to its beginning again (A-B playing) which is not seemless (because of the test signal itself which does not 100% end to the "starting cycle". When that happens, the analyser shows a "blip" (anomaly) and right away the noise is where it should be. And then all starts all over (rising).
Now with the laptop this happens the other way around (noise drops) but the sequence of the happening is the very same.

What's also crucial in my view, is that this process - or better the depth of if (difference between lowest and highest amount of noise) is higher with the isolated NOS1a. So that too got me thinking already; it really has to be "real noise" impeded, and of some oscillating kind.

All right. The last bit of this post goes in real time ...

Then I hooked up the laptop to the mains.
This laptop comes with a power brick which contains an earth connection; I assume this is really used. Anyway I plugged it into an earthed outlet. Btw not the same as the audio ring. Well, watch out ...

Noise line (without playing) is complety normal again. Hmm ...

Now let's press play and see what happens;

Same as before.

So now let's put the laptop in the same ring as the audio ring. No earth;

WOW. Noise line (no playback) is going wild beyond 80000Hz. See picture below. But otherwise - odd - the behaviour with Playback is exactly the same as in the other mains ring (with earth).

Last possible combination (leaving all other gear in the same place) : Audio ring but with earth connection (nothing else uses earth at this moment) :

Same story for the noise without playing.
Same story when playing.

There is more, but I'll finish this post now. Maybe more later ...

Peter

PS: Also see this post : Re: Cables with BNC Connectors/Adapters Are Generating A Superoir SQ - CAREFUL.

 7 
 on: September 20, 2014, 11:34:05 am 
Started by christoffe - Last post by PeterSt
Peter,

Can you clarify exactly what your mains earth arrangement is (I have lost track!). You say that the music PC is not connected to mains earth. I know that NOS1a is also not connected to mains earth. So are the Orelo MkII's connected to mains earth? (I assume they must be!!).

Audio PC - No earth;
NOS1a - No earth;
Amps (speakers) - No earth.

USB3 in Audio PC - Isolated;
Ground wire in NOS1a - Disconnected.

Audio PC connected to Server PC through wired Ethernet;
Server PC connected to different Mains ring (incl. earth) with all further devices connected to *that*.

No Monitor connected to Audio PC (video card still in);
No mouse and keyboard connected to Audio PC.
Note : RDC goes via (same) Ethernet cable between Audio PC and Server PC.

I played with this configuration for two days. Yesterday was the third, but at the second album something went wrong. And since that never happened to me before it can not be a coincidence :

A fairly loud tick, music stopped, another tick and music started again and I am almost sure that it was related to someone opening the door of the fridge (music stopped) and close it (music started).
But actually not sure because 20 seconds later again a loud tick and no fridge doors in order then. This is where I pressed stop.

Proceeded with Attended and this time 1 minute into the track, same thing. And because the loud tick reminded me of DC Offset, I checked that, et voilá. All wrong.
Huh ?

At this moment I am not even sure why music stopped (and was so easy to restart - just Stop and Play again, if not by itself anyway), but possibly the USB connection went out of order because of it.

This thus was with the "black wire" disconnected; I always advise people not to leave the room with that not connected, although I always do (it has been like that since May for this NOS1a configuration). This also because of the (forum) reporting of boleary (Brian) who seemed to have run into similar. In this case though, what was changed was the "no mains earth anywhere" configuration. So possibily this does not combine.

What I'll do tonight is play with the "black wire" connected. Next I hope I will forget about the issue, because such a loud tick is not really funny. Whether it helps ? maybe not.

Lastly, please notice that at this moment I do not see why a mains earth connection has to be there in the first place (from say one point at least).
So Paul, can you try to explain why you seemed so surprised about no earth connection anywhere ? Obviously you can be correct, but I don't see how.

Thanks,
Peter

 8 
 on: September 20, 2014, 10:09:19 am 
Started by PeterSt - Last post by PeterSt
Here's the story of what will happen to you when for whatever reason you were using a well broken in NOS1(a) and have to revert to a new one.

Simple : You won't survive it. Or won't know how to.
It will be the most frustrating part of your life. And you HAVE to get through it ...



So there you are with your new NOS1(a);
You unpack it, hook it up, listen and say WOW. Easy to claim this from my side, because everybody so far does.
You will notice easily that the next day it sounds way better and the third day better again. After that there's an off day, and after that (day 5) things normalize to day 3 again.
Nothing much happens any more until day 14 or so. Then day by day it gets better. At day 30, it's a bit finished.
Your NOS1(a) plays well. Very very well.
Still, after many months and a revisit to an album you played at day 30 fo the last time, will make you say "what ?!". So much better that now sounds.


Then sh*t happens for the whatever reason and you receive a new one.


Of course the new one sounds the same as the new one from a couple of years back. But not to you. First minute you may think it is okay, 2nd minute you are not so sure, and 5th minute all in you starts to shrink because it is as it is; It is so so much worse than when broken in. It now sounds totally ugly to you. No life in it. Flat. Grey. Yeah, nothing happening at all. How in the world could you have found this a good sounding DAC at the first unwrap ever back.



Nobody experienced this so far, although soon someone will.
I myself ran through the process because I set up a new DAC for the NOS1a prototype (I almost jumped from a bridge under way) and yesterday I experienced it again because I took my own NOS1a out of order and listened to a new one for the evening.
If you are like me (but let's not hope that) you will not be able to cope. I try to think of some comparison with normal life, but I think it doesn't exist. From one side there's the urge - or obsession if you want - to play music, while on the other this is exactly what should not be done because it kills all the good moods.
Being an audiophile must be something strange, and only in such rare occasions we notice what it really means. Something must exist like the opposite of adrenaline. Or a way under par level of it. Makes you restless. Don't know where to go.

Meanwhile guys, I realize how priceless a well broken in NOS1(a) actually is. So this morning I thought about how foolish it would be to sell a (you) NOS1 for (way) less than the new price. I came to this from the other angle : what would I myself offer for one, knowing how ultimately good it sounds after, say, two years of using it. Not sure how foolish it will be for some, but I think I would be offering 2000 more (name your currency) for one which has been broken in well.
Of course, when you don't know about it (you're just new to it) there's no problem. You will keep it anyway, and all goes graduately.

During the writing of this post, my mind comes to this post and by now I may wonder how realistic such a thing could be. I can't imagine that it was for the same purpose as the subject of my post as of now, but still it would be a very good way to do it. So that post describes (indeed) how a NOS1 owner had to order a new one for reasons, but next did not even unpack it and loans it to another person. Again, the purpose may be very different than what I describe here, but it would be win-win-win all over; Loan it for a month to someone of your liking, and when it comes back at least it's on par with normal breaking in.

This latter was not on my mind when I started this post. But it would solve that problem.

Regards,
Peter

 9 
 on: September 20, 2014, 09:24:33 am 
Started by 2glory - Last post by PeterSt
Happy Happy

 10 
 on: September 20, 2014, 04:17:08 am 
Started by 2glory - Last post by 2glory
NOS1a in the crib. Ha why own a TT when you can have the NOS1a. A Music box it is!! Only have 3 hours on it and I feel the $$$ spent was/is well spent. More to come as my system warms up from sitting idle for two weeks.

Pages: [1] 2 3 4 5 6 7 8 9 10
Powered by MySQL Powered by PHP Powered by SMF 1.1 RC2 | SMF © 2001-2005, Lewis Media Valid XHTML 1.0! Valid CSS!
Page created in 0.28 seconds with 15 queries.