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Old 16th February 2013, 07:58 AM   #6341
robbbby is offline robbbby  Canada
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Quote:
Originally Posted by Julf View Post
What would you ground the chassis to?
To the ground conductor I guess? The cable has 3 insulated conductors + shield

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Originally Posted by Julf View Post
Let the shield run to the connector on your amp, but don't connect that pin on the power input connector to anything.
Would the shield not need to be cut at this end if it isn't going under the same terminal as the earth conductor?

Quote:
Originally Posted by Julf View Post
But this assumes normal power - do you have a specific reason to go for the "balanced power" (basically simulated ground plane) of the equi=tec? If so, that might change the situation (and advice).
Honestly, no real reason for the balanced power supply. I was looking for some sort of power filter/conditioner for all my equipment and stumbled upon balanced supplies. After doing a bit of reading I figured a balanced power supply might be better to have over some sort of power conditioner. I got a really good deal on a 2kVA unit so I bought one. Figured if anything, it would at least supply better mains power and I wouldn't have to worry as much about stuff like air conditioner, fridge compressor and lighting interfering with power quality.


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Funny that they have no recommendation for the thermistor - but any normal PTC thermistor should do, as the current will be very low in your application. Just don't go for a NTC one...
Oh, now that you mention that it WAS a NTC. I didn't know there were various types so when you asked about what they recommended I just assumed NTC was an acronym for all thermistors and didn't mention it.
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Old 16th February 2013, 08:30 AM   #6342
Julf is offline Julf  Europe
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Quote:
Originally Posted by robbbby View Post
To the ground conductor I guess? The cable has 3 insulated conductors + shield
And you are connecting the earth lead to the chassis?

Quote:
Would the shield not need to be cut at this end if it isn't going under the same terminal as the earth conductor?
Yes, didn't realize you had a separate earth conductor too. I would not connect either (earth + shield) to the chassis, but with the "balanced' power transformer you probably do want to connect both to the chassis - otherwise you don't get any of the claimed benefits of the "balanced power" (if I sound a bit cynical, it is because I can't really take claims like "Bass resolution is tightened up remarkably and many users have told us that they can actually hear an extra octave of bass that was previously inaudible" when talking about just a mains transformer).

Quote:
Honestly, no real reason for the balanced power supply. I was looking for some sort of power filter/conditioner for all my equipment and stumbled upon balanced supplies. After doing a bit of reading I figured a balanced power supply might be better to have over some sort of power conditioner. I got a really good deal on a 2kVA unit so I bought one. Figured if anything, it would at least supply better mains power and I wouldn't have to worry as much about stuff like air conditioner, fridge compressor and lighting interfering with power quality.

Fair enough, but I am not sure the "power supply" really helps that much - from their description (somewhat vague) it appears it is just a mid-tap transformer.

Quote:
Oh, now that you mention that it WAS a NTC. I didn't know there were various types so when you asked about what they recommended I just assumed NTC was an acronym for all thermistors and didn't mention it.
Ah, OK! A PTC thermistor is used like a fuse, a NTC thermistor is used to limit inrush current when turning on the power. Again, any NTC thermistor intended for that use (as opposed to measuring temperatures) will be OK.
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Old 16th February 2013, 08:43 PM   #6343
cjf is offline cjf  United States
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OK, I have been watching this thread for several weeks now trying to get an idea on how the NC400 may stack up to other Class A, Class A/B amps folks have owned in the past and am left with one simple question.

For those who already own one of these NC400 amps, and hypothetically speaking If you were in the market for any Class A, Class A/B amp right now up-wards of $15K do you feel strongly enough about the SQ of the NCore's that you would still choose it instead of buying another offering from (insert brand x amp here) without reservations?

I would be especially interested in hearing from the folks who have previously owned an esoterically priced amp in the past and are now using an NCore because they feel it really is better then what they owned before.

I look forward to hearing anyone's straight up no BS assessment on these things so I can put all of the glowing reviews into some context.

Are these amps only "great" because (insert current owner here) doesn't have the finances to buy one of the other well known offerings from the big name brands (ie..Pass Labs,Classe,Ayre...etc) OR does current owner have the money to buy anything they want but chooses to use the NCore because it really is better then the other guys?

..Thanks for your time
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Old 16th February 2013, 09:20 PM   #6344
hifial is offline hifial  United States
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cjf,

Well, I have had a NC400 in my system as well as a NC1200. As good as the NC400 is the NC1200 was better. So I bought the NC1200. At $9,000 I think that means I could buy others you mentioned. As a matter of fact I have owned Theta Digital, Halcro and some others. Before I bought the NC1200 I considered Pass Labs (class A only), Mcintosh, ARC, Classe new top Monos (liked them a lot). I would still keep the NC1200 over the others.

The other amps are great amps, it is just that the Ncore amps give you more.
Also, I would be happy to have NC400.
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Old 16th February 2013, 11:57 PM   #6345
Regnad is offline Regnad  United States
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I also went the NC400 to NC1200 route. When I heard the NC400 I was smitten. The NC1200 improved on that and one big change is the bass control. With the NC1200 no subs are needed, I have never heard low end control like that.

I have not heard exotic amps except at dealers and shows but the NC1200 are driving 81dB MBLs like nothing I've heard. Other amps have been CJ 275M, Parasound JC-1 and MBL 8011M.

Too bad the NC1200 is not available to DIY, I wonder what is charged to OEMs for the modules?
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Old 17th February 2013, 02:51 AM   #6346
cjf is offline cjf  United States
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I am certainly intrigued by the NC1200. The only thing turning me off to them is the steady increase in price I am seeing by the few dealers right now offering them with no indication that anything new was added to offering from the time the prices were lower not that long ago. Merrill audio seems to have jumped up another $1k for their pair of Veritas since a few weeks ago with nothing different about the product that I can tell.

Now sitting at $10k a pair it's certainly far more attractive to simply go the bi-amp route using two sets of NC400's for less than half the price.
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Old 17th February 2013, 04:33 AM   #6347
hifial is offline hifial  United States
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cjf,

I believe there was an increase from some of the suppliers and the change in price was a long time coming. But if you go on Audiogon the asking price is still $9,000.

Also even two sets of NC400 will fall short to the NC1200.
Plus who gives you all the upgrades (Stillpoints, Synergistic Fuses, TWL Cables, all the Cardas) and that chases (and yes they make a difference,if you have the system to hear it). So if you used all of the same parts for a NC400 it would be less but not as much and it would still not sound as good. Then again maybe it will be OK for you.
You know, you can try them for 30 days in your system. Well, possibly best not, because if you do you will end up keeping them. Remember, the NC400 have been called giant killers by some, so what does that say about the NC1200.

Just MHO.
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Old 17th February 2013, 06:10 AM   #6348
Julf is offline Julf  Europe
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I would love to see the results from a properly controlled, level-matched, double-blind ABX (or ABC/HR or MUSHRA) listening test between the NC400 and NC1200.

I keep seeing all these comments about the audible differences between them, but knowing how good and neutral the nc400 is I find it really hard to believe that it could be improved on really significantly, and the measurements and specs don't point to any major differences either.
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Old 17th February 2013, 06:16 AM   #6349
Julf is offline Julf  Europe
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Quote:
Originally Posted by cjf View Post
For those who already own one of these NC400 amps, and hypothetically speaking If you were in the market for any Class A, Class A/B amp right now up-wards of $15K do you feel strongly enough about the SQ of the NCore's that you would still choose it instead of buying another offering from (insert brand x amp here) without reservations?
Absolutely. I have 8 nc400 modules in my system (4-way active stereo system), a not insignificant investment. I am more than happy with the excellent sound quality, and pretty sure there is no way I could improve the SQ of the system with another amp - right now, the other components are the limiting factor, not the amps.

On the other hand, there is no way I could have what I now have with a class A/B (not to mention class A) setup. 1600W per channel using traditional technology would warm up my living room nicely...
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Old 17th February 2013, 07:39 AM   #6350
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and pretty sure there is no way I could improve the SQ of the system with another amp
May-be the treble channels with a very good current feedback analog amp.
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