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Old 23rd November 2012, 07:14 PM   #5621
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Quote:
Originally Posted by Mark Verhoeven View Post
Loads of people can't tell the difference between a Syrah from Australia and one from France (or even a Syrah from France and a Cabernet Sauvignon from Australia...)

But I don't want a discussion started about WHY cables and/or resistors do sound different. I don't care.

I just wanted to tell that you CAN practice the listening skills as you can practice the tasting skills, just my opinion that is.
Well, I'm just in your target. I'm French. I love good vine. i was sound engineer and audio designer, and i want to know why resistances can sound different, because if you don't know why, you don't know how to chose them.
And about vines and cepages, they taste different, BECAUSE they measure different in chemical analyses. We are in a DIYer forum, and, like vine producers, in concern with the good and faster way to elaborate our products.
EOT on this subject for me.
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Old 23rd November 2012, 10:28 PM   #5622
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For me, no change of mind. I trust what I taste and I trust what I hear. Enough experience with both.

To go back to this topic: this evening I enjoyed listening to music amplified by my NCores and drinking some glasses of nice wine.
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Old 23rd November 2012, 10:40 PM   #5623
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Default Well....

Quote:
Originally Posted by Esperado View Post
Well, I'm just in your target. I'm French. I love good vine. i was sound engineer and audio designer, and i want to know why resistances can sound different, because if you don't know why, you don't know how to chose them.
And about vines and cepages, they taste different, BECAUSE they measure different in chemical analyses. We are in a DIYer forum, and, like vine producers, in concern with the good and faster way to elaborate our products.
EOT on this subject for me.
By this analogy, Fuses could sound different because of the different metallurgy of the end caps and element then
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Old 23rd November 2012, 11:41 PM   #5624
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Originally Posted by barrows View Post
By this analogy, Fuses could sound different because of the different metallurgy of the end caps and element then
And, they can, not because of the caps but because the thermal behavior of the alloy changing their resistance value.
Now we have to look at the overall system to see their influence and order of magnitude of the added distortion, as previously mentioned.
If the amp have a x% negative feedback factor, their influence will be divided by x. If the change of their value is 1/10 of the non linearity of the output devices, better to concentrate on those.
No need to use a great and very expensive wine in a 'Coq au vin' (Rooster cooked with wine).
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Old 24th November 2012, 01:08 AM   #5625
fas42 is offline fas42  Australia
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Quote:
Originally Posted by Mark Verhoeven View Post
I just wanted to tell that you CAN practice the listening skills as you can practice the tasting skills, just my opinion that is.
An easy way to practise is to use so-called poor recordings, they make differences extremely obvious; the intermodulation between the recording distortion and the system playback distortion creates very different spectrums of incorrect frequencies, making it easy to spot what's going on ...

Frank
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Old 24th November 2012, 06:02 AM   #5626
bavmike is offline bavmike  Canada
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Originally Posted by Esperado View Post
As far as the contacts are not degraded, i think the contrary: As the impedance of the tinfoil is lower than the fuse's one, it is more linear with temperature.
But i wonder: klipschorns are pretty efficient, don't they ? I wonder the volume to blow a fuse.
Yes you may be right. I'm not sure of how many DB's they were putting out but yes they were playing very loud when the fuses blew. I'm pretty sure they are 104db/1 w efficiency.
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Old 26th November 2012, 02:33 AM   #5627
robbbby is offline robbbby  Canada
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Hey guys, trying to do some troubleshooting and had a question for those of you that own ncores. When powering cycling the amps without anything connected to the amp other then the speakers are you guys experiencing any light popping at power up and power down?
When the amp is powered up, speakers connected but no input, are you guys getting static/white noise when you put your ear near the tweeter?

I'm just trying to figure a few things out and some are saying they get dead silence at the tweeter with the amp on and no source and some are saying the static/white noise is normal. Just wanted to see what others with ncores are experiencing.

Thanks
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Old 26th November 2012, 03:29 AM   #5628
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The amount of static/ white noise would be extremely variable depending on the efficiency of the speakers and the state of the mains power and also the earthing strategy? As a rule with these amps - they are designed to exhibit a very low noise floor - you should be able to hear a slight hiss at very close proximity to the speakers - however they should be dead quiet at the normal listening position unless the speakers are >say 95db efficient.
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Old 26th November 2012, 07:35 AM   #5629
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My Ncores are dead quiet. Always. When I put my ear onto the cone of my 98 dB efficient woofers, I can't hear any noise at all. Any HF noise would get lost, as the response of the woofers drops off above 2kHz, but anyway .....
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Old 26th November 2012, 09:14 AM   #5630
Julf is offline Julf  Europe
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Quote:
Originally Posted by robbbby View Post
Hey guys, trying to do some troubleshooting and had a question for those of you that own ncores. When powering cycling the amps without anything connected to the amp other then the speakers are you guys experiencing any light popping at power up and power down?
When the amp is powered up, speakers connected but no input, are you guys getting static/white noise when you put your ear near the tweeter?
Mine are absolutely quiet, but I have lowered the gain as I am driving mine with "pro" voltage levels.

Do you still get the noise/hiss if you short the inputs together?

I would suggest trying to shift the cable runs, and maybe the position and orientation of the amp modules in relation to the power supplies at least temporarily to see if it makes any difference to the hiss/noise.

I know it is a hassle, but I would actually take the modules back out of your enclosure, and just assemble the circuit on a table with everything as far from each other as possible, to hear if you still get the hiss (and see if changing their orientation with respect to each other makes any difference).
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