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Old 30th May 2012, 06:31 PM   #4241
Julf is offline Julf  Europe
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Quote:
Originally Posted by 3lviz View Post
"Analog, like loss of control, approximate, round in the edges", "digital, like accurate, controlled, honest"
Darn, your fingers were quicker
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Old 30th May 2012, 06:34 PM   #4242
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Quote:
Originally Posted by 3lviz View Post
"Analog, like loss of control, approximate, round in the edges", "digital, like accurate, controlled, honest"
Im afraid that is one of the rather bad translations of a way too often misused word.

Personally I wish that people would use another word than "analog" to describe their impressions as it typically leaves more questions than answers.

According to Wiki:
"Analog signal, a signal that contains information using non-quantized variances in frequency and amplitude"

In hifi its often used to describe audible attributes associated with those of turntables -leaving people to guess whether its those from the bad turntables or those from the good ones...

In either case, when I have been tweaking my turntable I dont want it to sound more "analog". I want IT to sound less, and the Record to sound more.
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Old 30th May 2012, 06:35 PM   #4243
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Quote:
Originally Posted by 3lviz View Post
"Analog, like loss of control, approximate, round in the edges", "digital, like accurate, controlled, honest"
Well here we go. With my sources, analog sounds more real than digital, but the gap slowly narrows. With hi-res digital, I may not bother to keep my LPs around.
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Old 30th May 2012, 06:51 PM   #4244
Julf is offline Julf  Europe
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Quote:
Originally Posted by Juhleren View Post
Personally I wish that people would use another word than "analog" to describe their impressions as it typically leaves more questions than answers
I guess the use of the word stems from the early days of CDs and digital players, when people who didn't know better thought they could hear the "corners" and "graininess" of a digitized signal (just because they had seen the typical unsmoothed staircase waveform illustrations). So "analog" was supposed to be smooth, rounded, without the sharp steps in a digital signal...
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Old 30th May 2012, 07:03 PM   #4245
antbom is offline antbom  Italy
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Originally Posted by emailtim View Post
Antonio,

Did the boxes come pre-drilled ??? The right chassis appears to have better wire placements than the left chassis. The power lines do not cross the signal lines and are further apart.
No I had to drill them myself.
Yes I know, the right one has a cleaner layout. Given the specular costruction I couldn't replicate that layout on the left one. But in this way I get more order and simmetry on the shelf where the audio stuff is placed.
Thank you for your answer.
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Old 30th May 2012, 07:30 PM   #4246
OllBoll is offline OllBoll  Sweden
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Now it's little me again... I have just placed back the gain resistors for current amp test... but I wonder if my connection scheme is OK or if it's wrong:

Click the image to open in full size.

Is this how it is supposed to be, with all the green grounds connected or is something wrong?

If someone knowledgeable ( ideally Bruno ofc ) would give thumps up that it's ok and won't destroy the NCore or the speaker I promise I'll measure output impedance and do distortion sweeps on atleast one speaker to check how well it works in practice =)
Attached Images
File Type: jpg NCore.jpg (84.8 KB, 1047 views)

Last edited by OllBoll; 30th May 2012 at 07:34 PM.
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Old 30th May 2012, 07:37 PM   #4247
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Quote:
Originally Posted by Julf View Post
I guess the use of the word stems from the early days of CDs and digital players, when people who didn't know better thought they could hear the "corners" and "graininess" of a digitized signal (just because they had seen the typical unsmoothed staircase waveform illustrations). So "analog" was supposed to be smooth, rounded, without the sharp steps in a digital signal...
I don't think that's quite it. Early CD players (1982-1992) just sounded horrible in the high end and they lost a lot of ambiance, imaging and detail. Of course the bass was usually impressive, there was no LP surface noise, it was cheaper and more convenient. Enthusiastically embraced by low- to mid-fi consumers. Audiophiles stuck with the LP. I bought my first CD in 1995. Over time, digital has steadily improved to the point that many audiophiles can't be bothered with LPs even if they do think analog sounds slightly better. With 24/96 recordings, I see no reason for analog recordings unless you already own them or they are unavailable in digital.

In electronics, I am a minimalist and I want my music processed as little as possible. I will ultimately listen in analog, so the less DA/AD conversion that goes on the better. If my source is analog, that means zero conversion.

Getting back to the topic of this forum, consider that a popular audiophile upgrade was to toss the SMPS and replace it with a linear PSU, despite the efficiency advantages SMPS. Part of the improvement of course was better components used in the linear PSU, but eliminating the digital nastiness in the PSU was also a significant factor.

As little as two years ago I never would have considered a class D amp (except for a sub-woofer) because of the "digital nastiness" that many complained about. Thanks to Hypex, LC Audio, ColdAMP, nuForce, and a few others, class D amps are earning a reputation of actually sounding BETTER than anything, particularly the ncore. My favorite amp of all time was a class A Threshold 400a that cooked my breakfast for me too. My second favorite amp(s) were a pair Sonic Frontiers tube monster mono-blocks that almost precipitated a divorce. My next amp will absolutely be a class D DIY (as soon as I have the money) and I expect it will be the best amp I have ever owned, not to mention the lightest and most efficient.

A year ago, I was leaning towards class D amps, but only with a linear supply. Now, it appears that SMPS design has advanced to the point where it is just as good as linear. So why not take advantage of the efficiency and weight reduction? Of course there are not many opinions of linear vs SMPS here. We know Bruno hears no advantage with SMPS and there was an unsuccessful attempt to mate a linear with supply with an ncore on this forum. I believe the vast majority of class D amp designers have selected SMPS: what does that tell you?

Still, I would be interested in the (extended) listening impressions of other members here with the ncores and hypex SMPS vs a suitable linear supply.
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Old 31st May 2012, 02:58 AM   #4248
hifial is offline hifial  United States
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Default Bruno

Bruno. My questions is for a group of us over at AC forum.
All are based on mono blocks.

In bridged mode the NC400 puts out 600w/8ohms-1200w/4ohms and what in 2ohms?

In bridged mode how many power supplies (smps) do you use or can use per bridged modules mono blocks?

If bridged, can the NC400 drive a 2ohm load?

Also my thoughts are to run 4 Bridged mono blocks on my B&W 802D speakers. One amp for each high and low on each speaker. Would this cause any problems? The B&W are 8ohms but dip down to around 3.4ohms.

Thank you in advance for answering my questions and thank you for creating this great amp.

Al.
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Old 31st May 2012, 04:45 AM   #4249
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Quote:
Originally Posted by hifial View Post
In bridged mode how many power supplies (smps) do you use or can use per bridged modules mono blocks?

If bridged, can the NC400 drive a 2ohm load?

Also my thoughts are to run 4 Bridged mono blocks on my B&W 802D speakers. .
Hi Hifial, did you try if two NC400, one for the high and one for the low, aren't enough? I really don't understand why you would like to bridge two NC400 for the high section. Especially on speakers which have a reasonable efficiency. The drawback is that the output impedance will be doubled hence DF will decrease.
You can always buy a Mola-Mola amplifier then you have the NC1200..
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Old 31st May 2012, 05:34 AM   #4250
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Quote:
Originally Posted by hifial View Post
Also my thoughts are to run 4 Bridged mono blocks on my B&W 802D speakers. One amp for each high and low on each speaker. Would this cause any problems? The B&W are 8ohms but dip down to around 3.4ohms.
Al.
I have listened to the ncore on the 802's, don't bother with bridging. We had plenty of sound with no approach of strain or clipping. If you wanted to use dsp or some sort of external crossover you might want to try two amps per speaker (hi lo) but I don' t see (hear) the need.

I think people don't appreciate the total change in character the ncore brings to amplification. Until it breaks up (clips) its absolutely clean. You haven't heard this before, the UCD started to approach this, but this is even more so. Look at the distortion charts, compare to other amps and you'll see what I'm getting at.

Or get the Mola Mola if you insist on more power and give Bruno and Jan their due.

Alan Garren
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