Totally forgot...
Thank you for the minireview.
It is nice that the ucd180 and nx200 are comparable in sound, that could make them an alternative if youre not interested in the other cool features inherent to class D design.
Have you heard any tripath amps flight1, if so could you compare?
Also, at max power how low ohms are you able to drive?
Thank you for the minireview.
It is nice that the ucd180 and nx200 are comparable in sound, that could make them an alternative if youre not interested in the other cool features inherent to class D design.
Have you heard any tripath amps flight1, if so could you compare?
Also, at max power how low ohms are you able to drive?
replay
Hi
I have 45volts out put from power supply as the the transformers are calculated at 230v but most of us still have 240volt in our houses so it makes a little difference. The spec for these moduals is +_ 20volts to +_75v so 45v puts it right in the middle which is ideal in my reasoning.
If you want to use a larger VA t/f with soft start it's up to you but there is no real need for the normal listening volumes in most houses. It is also a false assumption that you need more power for 5-1 as your surrounds don't do much as in comparison to your fronts in just stereo mode so the total power used is a bit more but all spread out over the amps.
The Hypex modules were udc180 HG but with such close results between the two one's set up and personnel ear it could lead to different opinions. If you were to use eather I think you would be happy,
Hi
I have 45volts out put from power supply as the the transformers are calculated at 230v but most of us still have 240volt in our houses so it makes a little difference. The spec for these moduals is +_ 20volts to +_75v so 45v puts it right in the middle which is ideal in my reasoning.
If you want to use a larger VA t/f with soft start it's up to you but there is no real need for the normal listening volumes in most houses. It is also a false assumption that you need more power for 5-1 as your surrounds don't do much as in comparison to your fronts in just stereo mode so the total power used is a bit more but all spread out over the amps.
The Hypex modules were udc180 HG but with such close results between the two one's set up and personnel ear it could lead to different opinions. If you were to use eather I think you would be happy,
Thanks for the info. The reason I asked is because the Hypex are supposed to be operated near their rating for optimum result (that's what the spec says). Elsewhere it has been reported that on a similarly designed module replacing the caps with Elna types improves the sound.
Member
Joined 2003
Re: nx200 5-1 power amp
Another UK member joins to tell us how awesome the UK made cheap amp is compared to Hypex UcD. Must just be a coincidence. 🙂
The fact that you have to set the bias current yourself leads me to believe that the modules are not tested at all at the factory.
Bias current affects both distortion performance and efficiency of the amp. Ideally this pot should be a sealed multi-turn type. Are you sure you've set bias current correctly? Should it not be set by output DC voltage divided by emitter resistance?
Sharpi31, how is your amp project progressing?
Another UK member joins to tell us how awesome the UK made cheap amp is compared to Hypex UcD. Must just be a coincidence. 🙂
Sorry I did not catch what your source and speaker are.flight1 said:
The fact that you have to set the bias current yourself leads me to believe that the modules are not tested at all at the factory.
Bias current affects both distortion performance and efficiency of the amp. Ideally this pot should be a sealed multi-turn type. Are you sure you've set bias current correctly? Should it not be set by output DC voltage divided by emitter resistance?
Sharpi31, how is your amp project progressing?
Re: Re: nx200 5-1 power amp
Of course geographically close customers are going to be the first to try the amp & your attempt to caste the review in some sort of sock puppet light is pitiful. Why not open up your mind to the possibility that there could be another amp on par with the Hypex?DcibeL said:
Member
Joined 2003
Mind is wide open, however the information presented is taken as-is. I have no doubt that there are many class AB amps that can compete with Hypex UcD. However due to the controversy revolving around this "Class-D" company I must approach new information with a bit of scepticism.
A new user has joined and his/her first post is a mini-review entailing a direct comparison of Hypex UcD to this NX200 module, with many details missing as to the comparison made. One can only take this information with a very small grain of salt, as there is no point of reference. The method in which this information has been presented to me is similar to a stranger on the street telling me it's going to rain tomorrow. Well okay, "you've convinced me", I'll tell him.
A new user has joined and his/her first post is a mini-review entailing a direct comparison of Hypex UcD to this NX200 module, with many details missing as to the comparison made. One can only take this information with a very small grain of salt, as there is no point of reference. The method in which this information has been presented to me is similar to a stranger on the street telling me it's going to rain tomorrow. Well okay, "you've convinced me", I'll tell him.
Member
Joined 2003
Member
Joined 2003
Browsing back again (slow day at work), this caught my eye.
Now look at the signature of this post here.
Now look at the signature of this post here.
Dcibel, wasn't referring to you in particular, but in general about the complaints on this thread.
Re: Re: nx200 5-1 power amp
Watch out Sharpi31, he is sharpening his pencil up in preparation to cr+p on you too.
DcibeL said:
Watch out Sharpi31, he is sharpening his pencil up in preparation to cr+p on you too.
DcibeL said:
I see why you are sceptical- you could well be correct - I just don't know anymore!
Member
Joined 2003
glt, I know, I was just trying to be funny...
I agree with you jkeny, I just don't know anymore either. I have however come to the conclusion that Cirrus18 is a hand puppet, however that is only my opinion, I'll leave everyone else to come to their own conclusions.
I agree with you jkeny, I just don't know anymore either. I have however come to the conclusion that Cirrus18 is a hand puppet, however that is only my opinion, I'll leave everyone else to come to their own conclusions.
jkeny said:
jkeny. Please explain what makes you sceptical and I will try to answer you.
I can well understand Dcibel because he has a completely closed mind to anything other than Hypex and will discredit whatever anybody says about Class-D Ltd modules.
Contrast his NX200 comments here and to that of his comments on my Hypex build project. Read what he said, http://www.diyaudio.com/forums/showthread.php?postid=1666244#post1666244. He thanked me.
No talk about me being in the pay of Hypex or this "The method in which this information has been presented to me is similar to a stranger on the street telling me it's going to rain tomorrow."
My review of the NX200 is exactly the same as that of the Hypex, if you accept one in good faith then you must also accept the other one. You can't pick and choose depending on the flavour of the month and your own personal preferences.
jkeny said:
jkeny. Please explain what makes you sceptical and I will try to answer you.
I can well understand Dcibel because he has a completely closed mind to anything other than Hypex and will discredit whatever anybody says about Class-D Ltd modules.
Contrast his NX200 comments here and to that of his comments on my Hypex build project. Read what he said, http://www.diyaudio.com/forums/showthread.php?postid=1666244#post1666244.
(Post 10.) He thanked me.
No talk about me being in the pay of Hypex, or this "The method in which this information has been presented to me is similar to a stranger on the street telling me it's going to rain tomorrow."
My review of the NX200 is exactly the same as that of the Hypex, if you accept one in good faith then you must also accept the other one. You can't pick and choose depending on the flavour of the month and your own personal preferences.
Cirrus18,
As I said, I don't know anymore - I'm just kinda tired with all the intrigue.
Anyway, one thing I know is that there are those who won't give this company or it's products a chance!!
As I said, I don't know anymore - I'm just kinda tired with all the intrigue.
Anyway, one thing I know is that there are those who won't give this company or it's products a chance!!
all this intrigue
Well there seems to be a lot of indecision out there? with people who haven't bit the bullet and built themselves an amp and tried for themselves these modules.
I thought the whole point of this forum was for people to build there own stuff and give there honest opinion of the results and to help others with their experience. It seems that some just want to 'dish' others real thoughts after they've actually taken the plunge and built something.
I would like to hear on this thread actual personnel experience of self build amps using these amps as pre mentioned with out all this conspiracy infection
what facts are missing has been suggested?
I truly believe that anyone who go's down the path that I have would not be disappointed with their hi fidelity results.
The only reason I have posted is because I would like other people to experience the same satisfaction I have got with my efforts
Well there seems to be a lot of indecision out there? with people who haven't bit the bullet and built themselves an amp and tried for themselves these modules.
I thought the whole point of this forum was for people to build there own stuff and give there honest opinion of the results and to help others with their experience. It seems that some just want to 'dish' others real thoughts after they've actually taken the plunge and built something.
I would like to hear on this thread actual personnel experience of self build amps using these amps as pre mentioned with out all this conspiracy infection
what facts are missing has been suggested?
I truly believe that anyone who go's down the path that I have would not be disappointed with their hi fidelity results.
The only reason I have posted is because I would like other people to experience the same satisfaction I have got with my efforts
Re: all this intrigue
I'm not sure why I keep bothering to respond to the constant play on words that this amp and its company represents. Maybe a too-strong sense of order.
But the whole point of THIS forum is to discuss class-D TYPE amps, not amps made by a company named "Class-D", who is really making class-AB amps. No, I'm not planning on giving this amp a chance, because I'm not in need of a class-AB amp. I'm currently interested in class-D TYPE amps, which is why I came here.
I've built, listened to and heard (and liked) many class-AB amplifiers (and some class-A) amplifiers using lateral or vertical mostfets. And they're great amps, though inefficient and bulky compared to the class-d amps. And they also have a place in an entirely different forum on DIY Audio, and it's called "Solid State". Not the "Class-D" forum which has zero to do with this (probably very fine, like many others) class-AB FET amp.
Sure the thread compares the AB to the sound of a real class-D amp. So.... if I decided that I liked gardening better than listening to my class-D amp, I can start a thread about petunias here and call people closed-minded because they aren't into it?
This is why there tend to be so many negative responses to the multiple threads about the "Class-D" class-AB amps. Not that people "here" are closed-minded or wanting to trash something they haven't heard, nor are they (necessarily) paranoid. It's because they didn't come here looking to hear about yet another class-AB amp of which there are thousands, and which we've mostly already done (and if still interested, know exactly where to go to discuss it).
Of course, we can just skip this thread and its brethren rather than be compelled to comment about it. But now I'm thinking about starting a few hundred petunia threads here......
flight1 said:
I'm not sure why I keep bothering to respond to the constant play on words that this amp and its company represents. Maybe a too-strong sense of order.
But the whole point of THIS forum is to discuss class-D TYPE amps, not amps made by a company named "Class-D", who is really making class-AB amps. No, I'm not planning on giving this amp a chance, because I'm not in need of a class-AB amp. I'm currently interested in class-D TYPE amps, which is why I came here.
I've built, listened to and heard (and liked) many class-AB amplifiers (and some class-A) amplifiers using lateral or vertical mostfets. And they're great amps, though inefficient and bulky compared to the class-d amps. And they also have a place in an entirely different forum on DIY Audio, and it's called "Solid State". Not the "Class-D" forum which has zero to do with this (probably very fine, like many others) class-AB FET amp.
Sure the thread compares the AB to the sound of a real class-D amp. So.... if I decided that I liked gardening better than listening to my class-D amp, I can start a thread about petunias here and call people closed-minded because they aren't into it?
This is why there tend to be so many negative responses to the multiple threads about the "Class-D" class-AB amps. Not that people "here" are closed-minded or wanting to trash something they haven't heard, nor are they (necessarily) paranoid. It's because they didn't come here looking to hear about yet another class-AB amp of which there are thousands, and which we've mostly already done (and if still interested, know exactly where to go to discuss it).
Of course, we can just skip this thread and its brethren rather than be compelled to comment about it. But now I'm thinking about starting a few hundred petunia threads here......
john65b said:
Ah but these petunia were grown from seeds that came from the Classd seed company. And they cost less and look as good as (or better!) than your over-hyped tulips, bub!
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