MF X-Can V2 Good For Which HPs And Modes

[XTRProf]

Before

Changed filter caps to Wima MKP.



And verdict?





Yup, just the spring cleaning and the MKP ............

[XTRProf]

Wow, as if my ears wax had just been cleaned out and can listen to 100khz. Super clear with massive details that I had not heard before. But unfortunately not like Live. So back to the drawing board.

[XTRProf]

Had been collaborating with the commis ............. Yup, those dreaded Russians and so they sent me 2 secret weapons like these ................





and fitted them to the V2 like this ..........

But no timer like the V3. So have to manual and run like hell ............


So am I still in one piece?

[XTRProf]

Yup, still is present here. So I guess I'm still in one piece. ;D

The sound had changed for the better. Knock knock the V2 to see whether it will explode. Wow, dead silence and no more microphony but Metronomy. So enjoy some Metronomy again here.



I very obviously missed the bass of the speakerfi for this.


So ..........





Clarity still there but all tone down somewhat like in an equaliser. Also more 3D like in paranormal activities. So the Russians are indeed with better military technology than the Americans military specs. But not enough and so looking for some resistance in the music to toppo the high further to the South. The resistance movement is named 120 ohms. So Kapitan? Am I correct, Sir?

[Deleted]

Apr 16, 2012 13:32:21 GMT XTRProf said:

Wow, as if my ears wax had just been cleaned out and can listen to 100khz. Super clear with massive details that I had not heard before. But unfortunately not like Live. So back to the drawing board.

Hmm... that input filter is designed to roll of beyond 0.7MHz (700kHz)@ -3dB.
Your hearing to 100kHz seems rather limited in that light ;D

[XTRProf]

Apr 16, 2012 15:10:31 GMT @solderdude said:

Apr 16, 2012 13:32:21 GMT XTRProf said:

Wow, as if my ears wax had just been cleaned out and can listen to 100khz. Super clear with massive details that I had not heard before. But unfortunately not like Live. So back to the drawing board.

Hmm... that input filter is designed to roll of beyond 0.7MHz (700kHz)@ -3dB.
Your hearing to 100kHz seems rather limited in that light ;D

Oh, we are dealing with the middle of last century technology which is called tubes or valves. So it's only limited to:


Specifications
Output power Typically 1W
Input impedance 47kOhms
THD <0.015% 20Hz-20kHz unweighted
<0.005% 20Hz-20kHz 'A' weighted
S/N ratio >96dB unweighted ref. full output
>108dB 'A' weighted ref. full output
Frequency response 30Hz to 75kHz <+/-1.0dB
Power requirement 12V AC 500mA (via mains adaptor supplied)


, according to the supposedly always right engineers' specs for the V2. Hmm, THD <0.015% 20Hz-20kHz unweighted
<0.005% 20Hz-20kHz 'A' weighted
seems too backward too for current hifi usage. By specs, how many can hear 0.005% "A" distortion? Yeah, I know we always hear and read about 007 and he's still can't beat those OP amps at even lower numbers even though he has got all the latest hitech equipment for his espionage. When is he appearing again or he had been sacked as he can't go lower number?

The Russians seemed to be more advanced than the Americana. OMG! And I thought that Americans have the most advanced methodologies according to specs.

[Deleted]

What is the point of posting those figures ?

What were you trying to convey ?

0.01% is the border at which we (mortal) humans can perceive 'things' in music.
Those are non music related noise artifacts by the way, harmonics (distortion) below that point has never been shown to be perceivable.
Experminents have shown that mixing in white noise at 'distortion levels' shows that in case the noise is 80dB below the maximum signal level this cannot be heard anymore.
-80dB = 0.01% that's where we get our 'minimal requirements for transparent audio' numbers from.
Noise level of extremely good recordings.
For Normal human beings (i.e. not audiophiles) the 'border' is believed to be at -60dB = 0.1%.
About the noise level of palpable recordings.

So with those figures (0.015%) the amp is 'good enough'
bandwidth (under which circumstances ?) 10Hz to 75kHz (-2 dB) is enough for most.
20-20kHz - 0.1dB is considered enough.
The unweigthed S/N ratio of 96 dB is rather poor (probably tube dependent as well) but as most headphones aren't really sensitive that noise level is below the hearing treshold.
Don't connect the V2 to inears or DT1350 or the likes of T1, you might hear the hissssssss.

There are also plenty of non Russion tubes that are low in microphonics.

Ohh... those Russians (Rasputin, Boney M)

[XTRProf]

Apr 16, 2012 16:57:22 GMT @solderdude said:

What is the point of posting those figures ?

What were you trying to convey ?

Oh, the middle of last century technology by definition of the specs order is insufficient for hifi. ;D

Apr 16, 2012 16:57:22 GMT @solderdude said:

Don't connect the V2 to inears or DT1350 or the likes of T1, you might hear the hissssssss.

IEMs are not for me, btw. Too uncomfortable for long term play. Open or semi close circumaural HPs are. Also, those Beyers are usually quite bright, right? Nope, not for me as well as not like Live. I'm also more a speakerfi lunatic than headfi.

Apr 16, 2012 16:57:22 GMT @solderdude said:

There are also plenty of non Russion tubes that are low in microphonics.

Ohh... those Russians (Rasputin, Boney M)

Care to name a few good ones so that I can play play too? New Mullards? Golden Lion?

Boney M did say Daddy Cool togather with the Huskies one. So they are superior ............

[Crispy]

Changed filter caps to Wima MKP

Chong, what difference in sound will changing these caps make?
Mine are still standard issue - so are they worth changing.

[XTRProf]

Apr 16, 2012 17:32:12 GMT Crispy said:

Chong, what difference in sound will changing these caps make?
Mine are still standard issue - so are they worth changing.

Oh, you will hear a cleaner sound with less grain. More soothing in other words. Anyway, even if you can't hear any difference, it's still a cheap upgrade to hiend parts std. Less than a pound for your consideration.

I will be changing mine to all MKP for the ceramics when I find them. FKP will be better still. Btw, I had made a mistake. That 2 red things are in fact FKP and not MKP. It's only the cummulation of the sum of the whole of the full upgrade that we can hear very clearly the difference anyway.

[Crispy]

Apr 16, 2012 13:20:45 GMT XTRProf said:

This has always been a problem on disassembly. So modify to ..........











More to come .............

Chong the way I got over this problem was to fix the LED in with blu tack, dead easy to remove and reuse when you re-assemble,
Simples Mr 007 ;D

[XTRProf]

Apr 16, 2012 17:43:46 GMT Crispy said:

Chong the way I got over this problem was to fix the LED in with blu tack, dead easy to remove and reuse when you re-assemble,
Simples Mr 007 ;D

Oh, my mode don't need to take out anything. It's just a LED/Connector joint now.

[XTRProf]

Btw, what have you moded for the V2? Care to share more?

[Deleted]

0.01% is the border at which we (mortal) humans can perceive 'things' in music.

This kind of outdated informated is proved incorrect every time someone replaces capacitors such as ceramic in feedback circuits etc. with MKP,silver mica or polystyrene.Silicon Chip magazine verified that in a few articles recently using their Audio Precision test gear, and were surprised at the noticable improvements. Likewise when fitting different types of input and output capacitors, or even bypassing them completely as Mike has done with the MF X-DAC series of HAs.

Oh, the middle of last century technology by definition of the specs order is insufficient for hifi. - XTRProf

I agree.

[Deleted]

;D Yes in the middle of last century human hearing has improved and can now indeed hear more than 50 years ago.

Sighted tests vs blind tests.
Subjective v.s. non-subjective.
religion vs science-religion.

[Deleted]

Yes in the middle of last century human hearing has improved and can now indeed hear more than 50 years ago.

As usual, you are at odds with the vast majority of R.G. members who can hear the differences between different capacitors,bypassed capacitors when possible, different I.C. s .,different types of headphone cables, even little "tampons" hanging on connectors etc.. The list goes on and on.. That should tell you something,other than everybody but you imagines these things.
I presume that even the switchable 330pF in your Ch.amp is a ceramic type too, as it supposedly can't possibly make any difference ?

[Deleted]

don't forget stones in a glass bowl, 'special' feet (only certain materials seem to work), tube dampers, power conditioning, plastic foil .....

Love the tampons but they look more like sanitary pads ... ;D

Yes, multilayer ceramic... the CHAmp must sound awfull, especially when the jumper is not set !

Same old same old....
NwAvGuy vs M.C.
Audiocritic vs hificritic.
Julf vs SandyK.
religious vs atheists.
Muslims vs Christians.

Contrails, UFO's, levitation, 0-point energy, alien life present on this planet (not talking about Krisno), jews conspiracy, atlantis, global warming...
The list of controversial things is endless... guess what... the audio debate is one of them.

That should tell you something,other than everybody but you imagines these things.

And yes... it tells me something.
Yet it is the opposite of what it tells you.
go figure....

And I believe it's not just ME not imagining, but the vast majority of people with the exception of a relatively very small amount of hifi-people.

When you hang around in a church chances are MOST people you meet believe in God.


Let's get on topic again...
MF X-Can V2 Good For Which HPs?

[Deleted]

NwAvGuy vs M.C.

You forgot NwAvGuy vs. his evil twin on HA output impedances ! ;D

P.S.
Most people could be excused for wondering why somebody who is unashamedly anti- subjectivity, became a member of a forum owned by PinkFloyd (Mike) with major contributions from Rick in the earlier years, which is built around subjective modifications to headphone amplifiers and other equipment,other than perhaps as part of a religious crusade to show all the members the error of their ways, and convert them to your "religion." The religion founded in Hydrogen Audio, and exported to other forums by people such as "Julf", who BTW, has now been banned from C.A. ;D

[Deleted]

Most people could be excused for wondering why somebody who is unashamedly anti- subjectivity, became a member of a forum owned by PinkFloyd (Mike)

Answer:

see reply #6
rockgrotto.proboards.com/index.cgi?board=review&action=display&thread=4769&page=1

Unlike many I am not active in any other forum, nor do I feel the need to.

Not ALL people in a church need to be religious by definition.
You can find relatively more believers in there than in the world outside that community.

I was a convicted subjectivist before I converted myself
My 'mission' is not to convert the unfaithfull heretics called subjectivists, but to educate and to assist in technical matters.

enough about me...

back on topic please.

[XTRProf]

Apr 17, 2012 11:02:27 GMT @solderdude said:

I was a convicted subjectivist before I converted myself
My 'mission' is not to convert the unfaithfull heretics called subjectivists, but to educate and to assist in technical matters.

Btw, you don't have or believed in a religion, so how can you convert others? Being an atheist.

[XTRProf]

Apr 17, 2012 5:31:28 GMT @solderdude said:

Yes in the middle of last century human hearing has improved and can now indeed hear more than 50 years ago.

Hmm, some engineers are designing with op amps to go to mega and gigahertz bandwidth for audio application. After putting filters to filter out the EMI and RFI waves. And we are supposed to be able to hear that as an improvement. A bit more than 100 Khz still not enough for human hearing.

Yeah, improve our ears too by using bionic ears to listen to hifi.

[XTRProf]

Back on topic.

After more than 30 hours BI, the brightness went further south. Not unexpected and indeed a relevation for me too. Now the music is with more body and soul. More Feeling as what Rod had said here .............






Then what you think? The same Feeling song again? Nope, the jazz version away from the pop that Rod started his career with! Yeah, those middle of last century music that we pop or rock uncles and aunties are gagaing over now more than those pop or rock we started with. Really, quite strange. I can't ever imagine I would be listening to folk, broadway, classical and traditional jazz when I was at 20.

[XTRProf]

All matched to less than 2% or even 0% and ready to go in. Let me listen to the V2 a few more days to stabilise.


Wima FKP

Vishay-Roederstein MKP




Btw, anybody seen 3.3pf MKP or FKP? Any brand will do.

[Deleted]

Btw, anybody seen 3.3pf MKP or FKP? Any brand will do.

;D

IF you have an accurate capacitance tester, twist 2 short lengths of
insulated wire together, and keep snipping the end off until it reads 3.3pF, if you think that a 3.3pF ceramic will result in audible degradation.

[XTRProf]

Apr 18, 2012 23:43:31 GMT @sandyk said:

IF you have an accurate capacitance tester, twist 2 short lengths of
insulated wire together, and keep snipping the end off until it reads 3.3pF, if you think that a 3.3pF ceramic will result in audible degradation.

Good idea there and never a dull moment even though it may look stupid. Now maybe I can have my hand on a "teflon cap" using OCC copper wires and teflon sheath.

Bravo! Never though of that and now upgraded to "teflon cap", man! Arrghhhhh, I realise that I don't have a LCR that can measure 3.3pf ............... Never mind, ceramic sound is also ok as I just don't want the V2 to be locked into a certain capacitor sound.

So members of the capacitor band so far are going to be:


1) Wima FKP
2) Vishay Roederstein MKP
3) Ceramic
4) Jamicon E-Caps
5) Unknown White Polyester (most probably from the looks of things)


Later on there will be a "band" members change to maybe:


1) Elna Cerafine BP
2) Muse BP
3) Mundolf Supreme MKP or Oil


Of course, I cannot change to Ian as I can't afford him. With him around, I can sack all, even the V2, and go Live.