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High End D-Class. Live or let die?

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DejanM
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Re: High End D-Class. Live or let die?

Post by DejanM » 02 Jun 2012, 08:18

BTW I think Solaja made an amp with Hypex modules and he was very satisified with the results and also with the measurements. He also claimed that these Hypex modules didn't produce HF garbage. That was couple of years ago when I was talking with him about his class D amp. These new versions should be even better ...

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DejanM
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Re: High End D-Class. Live or let die?

Post by DejanM » 02 Jun 2012, 09:05

Can this NC400 module work as a stereo amp ?

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Re: High End D-Class. Live or let die?

Post by DejanM » 04 Jun 2012, 21:53

Gerner,

And what about this:

http://www.aussieamplifiers.com/products.htm

It is not class D but class A/B but it has enough power and quite good characteristics. And it is cheaper ...

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DejanM
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Re: High End D-Class. Live or let die?

Post by DejanM » 05 Jun 2012, 08:01

Here you have some more implementation details:

http://www.audiodesignguide.com/CheapSystem3/index.html

Andrea does not usually talk much about sonic results of the amps that he builds. In fact, he never does it except in some cases and even then he spends no more than a couple of words to describe the sound of the system. Here though I could find the following:

" The amplifier will follows the sound of this true hi-end DAC given a top level result. "

This is the most that you can get from Andrea concerning sonics of the unit. Having that in mind, it seems that these modules are worth giving it a try ...

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DejanM
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Re: High End D-Class. Live or let die?

Post by DejanM » 05 Jun 2012, 11:11

They are also very simple to implement and the price is fair. I do not expect miracles but it could be more than only good ...

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DejanM
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Re: High End D-Class. Live or let die?

Post by DejanM » 05 Jun 2012, 20:38

No, life is not easy ... :D But you have sweet problems. :yh

JR625 seems to me to be a safe bet.


RIVIERA
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Re: High End D-Class. Live or let die?

Post by RIVIERA » 06 Jun 2012, 08:01

good kraft
these modules.
but there is one thing, the performances are directly affected by the
Q
of power transformers
(2 per ch. for grounded output topology as the diagram shows)
it is not issue of the consumption only to match, but for the
internal resistance of power supply that should be as low as it could be
and that is the diameter of the secondary wire to count in...
to acheive damping factor as better as it could be for the moments when the impedance of the speakers goes down below 2 ohms
or such.
for that specs it is preferable to have more space for windings, leeding to have bigger core
or to use special types with bigger window.
.
and bigger heatsinks too.
because the temperature probably tested for normal 22-25C
and should be for 40cca
.
and for the power caps bank, they should be rather from quality ones then for having
too big total values.
and that is have to be cout for needed energy stored for low Fo
rather then to putting over-valued Cs.
.
and that is the way for almost any power amp
for my oppinion in short
.
:nic


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Re: High End D-Class. Live or let die?

Post by RIVIERA » 06 Jun 2012, 08:14

I just foud this
http://www.parts-express.com/pe/showdet ... e=googleps
for have a closer look into the power ranges classes.
. :comp

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DejanM
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Re: High End D-Class. Live or let die?

Post by DejanM » 06 Jun 2012, 10:52

I would try to keep costs as low as possible. That means I wouldn't go for mono's but for the stereo option. That saves money for enlosures, connectors, wire and power modules as well. I would though go for separate PSUs for every channel, plus separated transformers for each channel. You can go with their PSUs - I think they are OK although not exceptional. I also do not think you will need 1200 module. I think 500 will be quite OK.

The problem with the price over 5.000 is that you have some good amps on offer for that kind of money, which you can audit prior to buying them. In that case you nearly do not have any risk, and you get some other things as well: support, guarantee, etc. Second-hand price is also much better in that case.

So, from the economics point of view, such an experiment does make sense only if the price is considerably lower than the price of branded amp, with similar SQ.

The idea to go for cost-no-object solution is quiet risky here, because nobody actually does have any experience with these modules and the question is on which level they really play ...


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Re: High End D-Class. Live or let die?

Post by RIVIERA » 06 Jun 2012, 12:36

exactly G :sign

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kamen
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Re: High End D-Class. Live or let die?

Post by kamen » 06 Jun 2012, 13:16

You can look from different sides,
but still is a lot of money, and work.
without an audition it's a risky investment.
Because if you don't get the sound that You expect
selling the amplifier for a reasonable sum of money will be
extremely difficult.

Pozz

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DejanM
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Re: High End D-Class. Live or let die?

Post by DejanM » 06 Jun 2012, 18:04

As alternative I would look at Krell mono's ... There you will find everything that you are looking for: more than enough power, capability to drive everything, good sound, ...

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DejanM
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Re: High End D-Class. Live or let die?

Post by DejanM » 06 Jun 2012, 20:51

Anyway, write here your experiences. It will be interesting to hear/read them ...


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Re: High End D-Class. Live or let die?

Post by RIVIERA » 07 Jun 2012, 00:16

maybe You need something like this? :mrgreen:
http://www.onahighernote.com/luxman/?c=4&id=28


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Re: High End D-Class. Live or let die?

Post by RIVIERA » 07 Jun 2012, 07:48

indeed...Ha...Ha
:dev
device is very good but maybe little overpriced..?
.
these BO, new series of D class is very good
(and "old" modules are excellent especially from PRO line, but hard to obtain?)
.
there is one thing close to the fact
all mucho power amps are almost - nothing but slaves.
manu of them haven't reliability like known brands of PA slaves like Crown for example...
and probably wry few of them have good Q for use them to drive not only subs.
:nic

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