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Old 18th October 2007, 10:04 PM   #1
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Post ColdAmp, ACD700, and NCD - Listeners only

I have spent a lot of time reading threads on these amps and am trying to decide between them. Specs wise they are all good. I will be powering thiel 2 2's so I need power.... This thread is meant to be about how they sound compared to each other. If I need to open another thread about config or opinions on what I should do that don't pertain to how they sound/compare let me know.

If you have listened to any TWO or more of the above please list your opinions. I don't want the reviews to get buried...

Thanks!
-Dwight
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Old 19th October 2007, 04:26 PM   #2
soongsc is offline soongsc  Taiwan
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I might be able to get a chance to compare UCD400 with NCD since I friend is trying out quite a few different things he can get his hands on.
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Old 30th October 2007, 12:00 PM   #3
Bgt is offline Bgt  Netherlands
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I have them all 3 and find the UCD 400's with LM4562 very nice. The NCD's (+LM4562's)are equally nice but have a bit more EMI. The Coldamp is louder in a sense that it is less modest than the other 2. Also a bit more EMI than the UCD's. I have a modified coldamp with LM4562's but did not have a proper chance yet to compare.
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Old 30th October 2007, 01:47 PM   #4
soongsc is offline soongsc  Taiwan
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The last time I was playing with the power for the NCD, there was significant difference with different transformers and between linear and switching supply. I have not gotton the chance to listen to the UcD yet, but talking with my friend, there were just different things he liked and disliked between the two.
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Old 30th October 2007, 04:15 PM   #5
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What I don't get, is that if the power supply can make such a difference why are Hypex and NCD Not making power supplies? I want SMPS. Cold amp seems to be the only company doing it. Maybe they're the only ones capable of making a decent power supply for class-d.
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Old 31st October 2007, 12:11 AM   #6
soongsc is offline soongsc  Taiwan
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Quote:
Originally posted by raintalk
What I don't get, is that if the power supply can make such a difference why are Hypex and NCD Not making power supplies? I want SMPS. Cold amp seems to be the only company doing it. Maybe they're the only ones capable of making a decent power supply for class-d.
I'm sure somebody must be working it, just not released because it's not better yet? For my experience with the NCD, I posted a long report in one of the NCD threads. Later we also tried a SMPS that would trigger the NCD protection mechnism before reaching power limits when plying loud music. We suspect that his is due to some PS impedance matching problems, but I am not fully involved with this aspect.
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Old 2nd November 2007, 08:00 AM   #7
IVX is offline IVX  Russian Federation
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Quote:
Originally posted by raintalk
Cold amp seems to be the only company doing it. Maybe they're the only ones capable of making a decent power supply for class-d.

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Old 2nd November 2007, 11:57 AM   #8
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Quote:
Originally posted by raintalk
What I don't get, is that if the power supply can make such a difference why are Hypex and NCD Not making power supplies? I want SMPS. Cold amp seems to be the only company doing it. Maybe they're the only ones capable of making a decent power supply for class-d.

Quote:
Originally posted by IVX




Wait and see....

It toke a very long time, indeed..., but we want to have something very good. Our target is to rate the SMPS what can stand full power of the amp at 20Hz and not at 1kHz.

Jan-Peter
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Old 8th November 2007, 02:39 AM   #9
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Please take time to let us know on the modified coldamp!

Thanks all,
-Dwight

Quote:
Originally posted by Bgt
I have them all 3 and find the UCD 400's with LM4562 very nice. The NCD's (+LM4562's)are equally nice but have a bit more EMI. The Coldamp is louder in a sense that it is less modest than the other 2. Also a bit more EMI than the UCD's. I have a modified coldamp with LM4562's but did not have a proper chance yet to compare.
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