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Old 28th September 2013, 01:37 PM   #7171
Julf is offline Julf  Europe
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Quote:
Originally Posted by troystg View Post
3.5A. If you draw that at the amp either you have VERY inefficient speakers or your hearing is not so good...
WHAT?

Assuming the US 110 V mains voltage, 3.5A only gives you 385 W. Considering the SMPS600 is rated at 600W output, you would definitely exceed the 3.5 A rating even assuming 100% efficiency. Of course the cable rating is for continuous current - I agree we won't be playing our amps at full volume continuously. The question becomes one of resistance - the thinner the wire, the higher the resistance. At what point does the power supply or amp become supply-resistance bound? In any case, while I feel there is no need for thicker-than-standard wires, I wouldn't go too much thinner either.

Quote:
And current capability is based upon distance.
Is it? Resistance is based on distance, but power rating is usually based on thermal limitations, and they are distance-independent beyond very short distances.
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Old 28th September 2013, 02:17 PM   #7172
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Quote:
Originally Posted by troystg View Post
EDIT: I'm pretty sure Bruno knows what the wire size requirements were.. He's pretty thorough..
I agree.
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Old 28th September 2013, 02:35 PM   #7173
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Quote:
Originally Posted by Julf View Post
Your list does not include electrical DC resistance or impedance - the most important parameters.
I agree with you. No electrical or EMI resistance. But I don't know simple wires which has that protection.
This is cheap, reliable, multicore cable.
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Old 28th September 2013, 02:38 PM   #7174
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Of course Hypex/Bruno know what they are doing when spec-ing in these wires.

But I really don't like the thin AC & DC wires.

The connector inlet for the AC portion look possible to put in a bigger wire size.
But the DC connector inlet look very tight.
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Old 28th September 2013, 02:48 PM   #7175
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Originally Posted by bbest View Post
I agree with you. No electrical or EMI resistance. But I don't know simple wires which has that protection.
I think we are struggling with two different meanings of the word "resistance". One is "The act of resisting, or the capacity to resist" (as in your example of resistance against EMI), the other is electrical resistance, defined as "the property of a conductor due to which it opposes the flow of current through it", and measured in Ohm.
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Old 4th October 2013, 04:42 PM   #7176
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Just want to find out what you guys use for the pre-amp & speaker for the Ncore amp.

At the present moment, I do not have a proper stereo pre-amp.
But have a old int amp (MusicalFidelity A5.5) & Kef Q700 speaker.
Thinking of getting a fully balance pre-amp for the Ncore.
Source is OPPO 105 BR player (think is also fully balance).
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Old 4th October 2013, 06:15 PM   #7177
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Originally Posted by tane0019 View Post
Just want to find out what you guys use for the pre-amp & speaker for the Ncore amp.
No pre-amp, I just use a streamer feeding a digital crossover for my nCores.
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Old 5th October 2013, 09:01 AM   #7178
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Arrow ncore and power outage

my power grid is unreliable with several blackouts a day. how does the ncore react with power outage / blackouts ? will it cause damage to the amp or speakers ? (loud pop?) do i need a extra protection circuit then?

i will use a power inspired ag1500 ac regenerator (but without a battery) for better ac quality with 1500VA for 2 ncore monos and a pair of current hungry magnepan mg12 magnetostatic speakers.

would you place the monos direct behind the magnepans to have the speaker cable as short as possible or would you place them further away in one dual mono enclosure because of microphonic or electrostatic interference from the speakers?

i would like to make a hotrodded version of the ncores (no binding posts/iec outlet/power switches). any reason against it (aside reselling chances)?

is there a tutorial for the ncore build for people who wont scroll through 700+ pages? if not would you please post the most important ones for me ?

enclosure (damping, shielding, spiking, aluminium or wood enclosure, links?)
cables (speaker cables, power cables (Lapp olflex 110 or 891), solder)
twisting and best placement for power, speaker, xlr cables? ...
(i will build and buy the parts in EUROPE)

Last edited by sonorsnoopy; 5th October 2013 at 09:25 AM.
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Old 5th October 2013, 03:04 PM   #7179
Julf is offline Julf  Europe
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Originally Posted by sonorsnoopy View Post
my power grid is unreliable with several blackouts a day. how does the ncore react with power outage / blackouts ? will it cause damage to the amp or speakers ? (loud pop?) do i need a extra protection circuit then?
If it is a proper outage, it does a proper soft start cycle, no prob. Haven't really tested what happens with brownouts.

Quote:
i will use a power inspired ag1500 ac regenerator (but without a battery) for better ac quality with 1500VA for 2 ncore monos and a pair of current hungry magnepan mg12 magnetostatic speakers.
Why are you using the regenerator? Is the power "dirty" besides being unreliable?

Quote:
would you place the monos direct behind the magnepans to have the speaker cable as short as possible or would you place them further away in one dual mono enclosure because of microphonic or electrostatic interference from the speakers?
I would try to keep speaker cables as short as possible.


Quote:
i would like to make a hotrodded version of the ncores (no binding posts/iec outlet/power switches). any reason against it (aside reselling chances)?
Any reasons for it?

Quote:
is there a tutorial for the ncore build for people who wont scroll through 700+ pages? if not would you please post the most important ones for me?
The Hypex data sheet has pretty much all the info you need.

Quote:
enclosure (damping, shielding, spiking, aluminium or wood enclosure, links?)
Definitely recommend metal instead of wood.

Quote:
cables (speaker cables, power cables (Lapp olflex 110 or 891), solder)
Thick enough cables is the most important one.

Quote:
twisting and best placement for power, speaker, xlr cables? ...
I recommend diligently following the twisting advice in the Hypex documentation.
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Old 19th October 2013, 08:33 PM   #7180
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My sincere apologies if this has been asked and answered in this thread or any of the others. I did my best to search.

My question is, what is the appropriate connection between a DAC and the Hypex amps when they are in the same chassis? It would be nice to know
1) Single ended vs differential, and
2) If there is any difference in recommendation between ncore and ucd.

All the info I found so far refers to chassis connections, assuming the signal comes from the outside. I will be using transformer-isolated SPDIF inputs, so there won´t be any external ground inputs.

Btw - I will use Class 2 construction.
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