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Old 5th September 2012, 07:04 PM   #31
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Quote:
Originally Posted by Stefanoo View Post
.......
for the number of MOSFETS I have just checked pictures of the inside on the web, counted the number of output device and concluded they are the same number.
........
few different revisions of output stage , at least to my knowledge

later iterations are having more outputs

just count them in XA30.5 ..........
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Old 5th September 2012, 07:29 PM   #32
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oh maybe there was a misunderstanding.
I thought you meant that the X250 and X250.5 have different number of mosfets.
Maybe you are referring to the XA200.5 I am not sure

I am alsmost tempted to buy another X250 and use both for parts to re-do board and build two monoblocks which double Idle Current and different front end and single ended output bias.
I think it could be a nice experiment
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Old 5th September 2012, 07:57 PM   #33
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I was careful , writing exact types and relevant info

btw . for that experiment - you need plenty of Lira's ...... same as gray cells , mileage ..... and firm idea what are your goals



my approach is always - use lesser power and better speakers
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Old 5th September 2012, 08:15 PM   #34
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I will check pictures on the web and compared them to my unit, but again, it looks like they have same number of output devices, why don't you check for yourself?
Not trying to question your facts, just showing you some pics and wonderring whay is that.

yeah I 100% agree with you.
I am not going to do it now as I am working on something else and don't have much time.
I am just collecting some ideas and thoughts and I will engage on this once I have worked the circuit out in my mind, simulated it and got 100% confidence with it as I do with anything else I build for myself and for others

I will need pleanty of Liras ahahah in my case Dollars, true; however if you think things right, you will see you won't need as much money as building everything from scratch.
Just think how much it would cost you or me to buy a custom Plitron Transformer (selected for noise), 2 sets of 12 matched output devices, a wonderful finished chassis all the filter caps and why not rectifying diodes and last but not least important heatsinks for your output devices that are not only going to do their job but also going to match your enclousure and extremely nice looking as well.
I mean this much more than what you could pay for a X250.

Regarding speakers, I don't only need power but quality also....and you can go if you want to find me a better pair of speakers than my B&W800Signature and I will gladly take them (obviously without spending more than that).

BTW you forgot that along with good speakers you need to have a good preamplifier and good source and good cable gears before even thinking of improving or having a higher power Power AMP.
I haven't mentioned that but I got everything and that is why I think it would be nice to perhaps trying to build something myself with the basic idea above and then later on get a serious gear such as X600.5 or XA200.5 granted that they could possibily be better than what I am eventually going to make
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Old 5th September 2012, 08:33 PM   #35
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no dispute at all .....

except fact that we are having diametrically different taste for spks , so - in case of you - any recommendation from me is nonsense

anyway look at this , X250 : Click the image to open in full size.


X250.5 (which I didn't commented ) : (attached)


XA200.5 : Click the image to open in full size.


conclusion - none combination of these (X250 , X250,5 and XA200.5) is having same number of outputs ........ and , just to repeat , none of them is having any resemblance of Aleph OS

disclaimer - my (secret spy) little bird at PL is sometimes tricky , maybe because I'm asking silly things all the time
Attached Images
File Type: jpg x250.5.jpg (74.5 KB, 215 views)
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Last edited by Zen Mod; 5th September 2012 at 08:39 PM.
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Old 5th September 2012, 08:45 PM   #36
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just for fun
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File Type: jpg just for fun.jpg (240.2 KB, 214 views)
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Old 5th September 2012, 08:51 PM   #37
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Different taste of speakers....
Interesting!
Keep only in mind that the most prestigious studio recordings have these speakers for their high quality mixing.
Casuality? Commercial reasons? I don't think so.
The 800Signature and the lateat 800 Diamond are simply the most neutral and transparent speaker you can buy that can actually be employed to create the original master recording that you will go listen through your system and probably alter and colour with other type of speakers
Now I am not saying the 800 are perfect and that there are not other good speakers out there, just that they are among the very best!!!
If you have another pair of 20-25K speaker then we can discuss about personal taste, otherwise it would be like comparing apple with oranges only because they both have round shapes.

Said that, to complete your thoughts on the X250, your picture referes to the first prodcution.
On mine, the latest one, I don't have TO3.
Mine looks EXACTLY like the last picture you posted which is the X250.5

I will attach some pic tonight if you want me to, that will help clear out this little debate
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Last edited by Stefanoo; 5th September 2012 at 08:53 PM.
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Old 5th September 2012, 08:52 PM   #38
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Quote:
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just for fun
This is a cool picture BTW
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Old 5th September 2012, 09:02 PM   #39
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Quote:
Originally Posted by Stefanoo View Post
This is a cool picture BTW
previous post (to quoted one) was maybe little confusing; anyway - look at my last post - one pic

amps are - from left to right - X250 , X250.5 , XA200.5

regarding your and mine spks - there is no use in trying persuading ZM in liking modern speakers ....... I'm completely on romantic side of speakers

I'm pullin' your leg , and really not saying that your speakers aren't great ( even if I really don't care for them ) , so - it's completely irrelevant what's my reference .

so - you're having transitional model , between X250 and X250.5

probably even Pa can't remember all variations during all these years .

what's important - you're having great amp , it doesn't matter which generation it is ......
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Old 5th September 2012, 09:07 PM   #40
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you are not alone though!
I know many other people who don't like modern speakers and they have their good reasons that I might not have fully grasped yet.

I don't know, all I know is that I have a X250 and it looks exactly like the 250.5, but I am sure like you said there are significant variations and you really helped me pointing out good points regarding output bias, thanks for that!
I will attach some pics tonight just for your fun
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