Hi Kooka,
You clearly still have your UCD modules AC coupled with the stock electrolytic, non biased caps, haven't you?
I don't think you've actually at all experienced what they're capable of yet.
Perhaps you should consider either DC coupling them, or in the very least shorting them out and employing a semi-decent quality film cap at the input for improved AC coupling.
You'll start to see some jaw drops then, but that's just the beginning. A short cut to the end is the HG line
The only way it is "KILL" 'd by anything, is if something is very wrong! Good luck fixing it.
You clearly still have your UCD modules AC coupled with the stock electrolytic, non biased caps, haven't you?
I don't think you've actually at all experienced what they're capable of yet.
Perhaps you should consider either DC coupling them, or in the very least shorting them out and employing a semi-decent quality film cap at the input for improved AC coupling.
You'll start to see some jaw drops then, but that's just the beginning. A short cut to the end is the HG line
The only way it is "KILL" 'd by anything, is if something is very wrong! Good luck fixing it.
classdphile said:Hi Kooka,
You clearly still have your UCD modules AC coupled with the stock electrolytic, non biased caps, haven't you?
I don't think you've actually at all experienced what they're capable of yet.
Perhaps you should consider either DC coupling them, or in the very least shorting them out and employing a semi-decent quality film cap at the input for improved AC coupling.
You'll start to see some jaw drops then, but that's just the beginning. A short cut to the end is the HG line
The only way it is "KILL" 'd by anything, is if something is very wrong! Good luck fixing it.
All my UCD's are using Nichicon Fine Gold electriolitycs, and the 180's (the ones closer in power to MCD) are with the AD opamps.
To be honest they have not been "killed" by the MCD: they have been totally destroyed, to cut a long story short.
Simply another league.
I guess you never listened the MCD... did you?
Hi Kooka,
For the sake of the point I'm making what I've heard or not is irrelevant here.
It would seem you're as polarized as those bargain bin electrolytic coupling caps you're listening to, the only difference being, they are without bias.
I saw the pictures you posted of your amp, you have "upgraded" the caps that matter the least and ignored those which are detrimental to performance, so really it hardly matters if you used black gates. I should expect it to be shamed in such a sad state.
I hope you manage to fix that before commenting further, if only to be fair to yourself as the amps in question are proven.
Good luck, I do hope you get to hear them some day.
For the sake of the point I'm making what I've heard or not is irrelevant here.
It would seem you're as polarized as those bargain bin electrolytic coupling caps you're listening to, the only difference being, they are without bias.
I saw the pictures you posted of your amp, you have "upgraded" the caps that matter the least and ignored those which are detrimental to performance, so really it hardly matters if you used black gates. I should expect it to be shamed in such a sad state.
I hope you manage to fix that before commenting further, if only to be fair to yourself as the amps in question are proven.
Good luck, I do hope you get to hear them some day.
classdphile said:
Hi Classddphile,
I own both amplifiers and I can tell you the enormous difference between one and the other. Not a little difference: a different league, another planet.
You reply saying that you did not hear one of them but you are sure the other is better.
Do I have to add anything?
Bye
p.s. I am still waiting to hear what mods can modify UCD's sound in order to close a gap that is more than enormous: it is just different worlds.
More: I compare the two amps without moddings, because this is the only way to compare 2 amps as they are.
🙁 He guys why do all these Class D threads have to end in a fight??
I vote for renaming them in Class W (of war).
Lets all behave as grown ups!! This is a hobby isn't it??
I wish us all an inspiring, critical and peacefull thread
Yours
Peter
I vote for renaming them in Class W (of war).
Lets all behave as grown ups!! This is a hobby isn't it??
I wish us all an inspiring, critical and peacefull thread
Yours
Peter
peterhenk said:
I am very relaxed and peaceful
🙂
What really makes me smile is someone saying he did not compare amp1 and amp2 but he knows amp1 is better.
Does it make any sense..?
hello Kooka
nice to heard about that you like the amp.
at mcd-255 there are not a DC coupling , it is a AC coupling with a 40uf caps.(2x 20u smd cap, 1206 size)
some one like dc , some one like AC, this is a personal choise.
you use two transformer to drive two modules , that's great.
we also found two transformer to two mudules is quite better than one transformer to two modules.
this also happened at class-AB or others.
rg
fumac
nice to heard about that you like the amp.
at mcd-255 there are not a DC coupling , it is a AC coupling with a 40uf caps.(2x 20u smd cap, 1206 size)
some one like dc , some one like AC, this is a personal choise.
you use two transformer to drive two modules , that's great.
we also found two transformer to two mudules is quite better than one transformer to two modules.
this also happened at class-AB or others.
rg
fumac
Many thread get into fights when people are trying to take sides without similar experience. Something we have to live with.peterhenk said:
Hi,
There is no fighting going on here, just some kind of language barrier.
These strawman arguments are borish. You've completely ignored the points and suggestions I've given you while attempting to put words into my mouth such as a supposed preference I have for one over the other, when I've supposedly not heard them. Go back and read the posts and you'll see you have fabricated all of that out of thin air.
Now here you are saying "Oh I wish I knew of.... still looking for that mod that will make the UCD sound so good". When I already told you exactly where to start looking, but you continue to ignore it.
Further you started off stating your extensive experience for having owned all of these UCD modules, which were modified to what level of perfection by yourself? Suddenly there's proportionality between correlation and causation? Certainly we all like to think that all we touch turns to gold, in reality though..
Now it becomes apparent you haven't taking much time at all to figure out what you were doing, you only stuck some "gold" on it and expected it to sparkle. Suddenly now, you revert to saying that you compared the amps in stock form, because that's the only way!? Sir, they are not stock, you did change the caps on all of UCD's, including an op amp on one of them, you just overlooked entirely the simple modifications that are most critical, and so they are not well implemented, thusly really having little chance of sounding very good at all, but this doesn't suddenly change their status back to stock just because you feel like it, does it.
So once again before you start putting more words in my mouth again, which seemingly doesn't work so well, I have no doubt you heard what you heard, and I have no doubt that's your fault. I find it incredible you as a hobbyist, would not be more willing to jump all over fixing that simple oversight after finding out how little it takes. This makes me question if you are here serving as a hobbyist or perhaps, something else. I guess I will sum up by saying that your review is absolutely useless to me and leave it at that.
Hi Fumac, I appreciate that you're apparently some kind of enginear, and that you also struggle with the language, very well if you ask me, but to say that AC coupling Vs DC coupling is a matter of personal preference? I guess you could say getting hit in the head with a hammer-----> is also a matter of personal preference, but purely on a technical level, is it really the best cure for a headache?
I leave you all to it.
There is no fighting going on here, just some kind of language barrier.
These strawman arguments are borish. You've completely ignored the points and suggestions I've given you while attempting to put words into my mouth such as a supposed preference I have for one over the other, when I've supposedly not heard them. Go back and read the posts and you'll see you have fabricated all of that out of thin air.
Now here you are saying "Oh I wish I knew of.... still looking for that mod that will make the UCD sound so good". When I already told you exactly where to start looking, but you continue to ignore it.
Further you started off stating your extensive experience for having owned all of these UCD modules, which were modified to what level of perfection by yourself? Suddenly there's proportionality between correlation and causation? Certainly we all like to think that all we touch turns to gold, in reality though..
Now it becomes apparent you haven't taking much time at all to figure out what you were doing, you only stuck some "gold" on it and expected it to sparkle. Suddenly now, you revert to saying that you compared the amps in stock form, because that's the only way!? Sir, they are not stock, you did change the caps on all of UCD's, including an op amp on one of them, you just overlooked entirely the simple modifications that are most critical, and so they are not well implemented, thusly really having little chance of sounding very good at all, but this doesn't suddenly change their status back to stock just because you feel like it, does it.
So once again before you start putting more words in my mouth again, which seemingly doesn't work so well, I have no doubt you heard what you heard, and I have no doubt that's your fault. I find it incredible you as a hobbyist, would not be more willing to jump all over fixing that simple oversight after finding out how little it takes. This makes me question if you are here serving as a hobbyist or perhaps, something else. I guess I will sum up by saying that your review is absolutely useless to me and leave it at that.
Hi Fumac, I appreciate that you're apparently some kind of enginear, and that you also struggle with the language, very well if you ask me, but to say that AC coupling Vs DC coupling is a matter of personal preference? I guess you could say getting hit in the head with a hammer----->
is also a matter of personal preference, but purely on a technical level, is it really the best cure for a headache?I leave you all to it.
I think comparisons should be done with all stock units, same power level with the same power supply. Different transformers make so much difference that it is really hard to have a clear evaluation. Stock units show the original designer preference for a particular price range.
Regarding AC or DC coupling, if an AC coupled device is performing better than a DC coupled device, then I think the DC coupled device really has a problem.
If the MCD can take a 42V transformer, I certainly would like to give it a try.
Regarding AC or DC coupling, if an AC coupled device is performing better than a DC coupled device, then I think the DC coupled device really has a problem.
If the MCD can take a 42V transformer, I certainly would like to give it a try.
soongsc said:
That's the point: the only way to compare any kind of products is comparing the stock ones.
They are classD, same price range and same power range, and they should be compared as they are, not "about a potential" with moddings here an there, and there again.
I suppose 42V are too much (I used 32-0-32V transformers), but ask Fumac...
I still suggest you get a proper transformer and give it a try.
classdphile said:Hi,
There is no fighting going on here, just some kind of language barrier.
These strawman arguments are borish. You've completely ignored the points and suggestions I've given you while attempting to put words into my mouth such as a supposed preference I have for one over the other, when I've supposedly not heard them. Go back and read the posts and you'll see you have fabricated all of that out of thin air.
Now here you are saying "Oh I wish I knew of.... still looking for that mod that will make the UCD sound so good". When I already told you exactly where to start looking, but you continue to ignore it.
Further you started off stating your extensive experience for having owned all of these UCD modules, which were modified to what level of perfection by yourself? Suddenly there's proportionality between correlation and causation? Certainly we all like to think that all we touch turns to gold, in reality though..
Now it becomes apparent you haven't taking much time at all to figure out what you were doing, you only stuck some "gold" on it and expected it to sparkle. Suddenly now, you revert to saying that you compared the amps in stock form, because that's the only way!? Sir, they are not stock, you did change the caps on all of UCD's, including an op amp on one of them, you just overlooked entirely the simple modifications that are most critical, and so they are not well implemented, thusly really having little chance of sounding very good at all, but this doesn't suddenly change their status back to stock just because you feel like it, does it.
So once again before you start putting more words in my mouth again, which seemingly doesn't work so well, I have no doubt you heard what you heard, and I have no doubt that's your fault. I find it incredible you as a hobbyist, would not be more willing to jump all over fixing that simple oversight after finding out how little it takes. This makes me question if you are here serving as a hobbyist or perhaps, something else. I guess I will sum up by saying that your review is absolutely useless to me and leave it at that.
Hi Fumac, I appreciate that you're apparently some kind of enginear, and that you also struggle with the language, very well if you ask me, but to say that AC coupling Vs DC coupling is a matter of personal preference? I guess you could say getting hit in the head with a hammer----->
I leave you all to it.
You probably have a lot of time to waste: stock MCD sounds a world better.
All modding and tuning and upgrading of a Toyota Corolla can probably push a Toyota Corolla to 200mph. But I doubt a car magazine would use "that" Corolla for a comparative test with another car, a stock one, dont you think so?
So please try to undestand we are not talking a bout "potential" of something or something else: we are talking about this and that, both stock units, both classD, bot in the same price and power range, both in their stock version. These are the things compared. Not the possible, virtual "potential" of anything.
Now, if you want, go ahead by yourself.
p.s. of course I never meant to say Ucd's sond bad. Just to make it clear.
That's the transformer I used in the NCD, so I just hope to keep the same power supply and feed the MCD if it can take it.Kooka said:
soongsc said:
hi soogsc, you can use our mhzpower-4 modul,
it can running at +/-45v~+/-72v,
is about 2x 32vAC~52vAC,
rg
fumac
Kooka said:
Of course I listend to Ucd's stock ones, and modded ones.
Just for replying to that new forumer who jumps here telling that someone is here for some other reasons than talking as a hobbyst.
Very poor words indeed, which I would not comment further.
soongsc said:
yes, including mother board just need a transformer that it can run 🙂
same like MCD,
rg
fumac
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