HYPEX UcD2K and SMPS3k

[henry218]

Or A or B  

 

It appears that LG are actually using a class B amplifier.

thats what i read also, but not sure. im not familiar with them except the long thread clone from sanway at avs

[davewantsmoore]

ok ill take your word for it

 

Unwise       EDIT:   I mean you should find out yourself... that wasn't a stab at Roger   (Hi Roger!  )

 

Luckily for professional grade products mysteries are unusual.   The truth is out there  

Edited March 28, 2014 by davewantsmoore

[henry218]

Unwise  

 

Luckily for professional grade products mysteries are unusual.   The truth is out there  

but the thing is, why AB should sound better in such a limited freq, i mean if we compare current capability of the 2 topology that would be fair.

 

what i mean is, domestic hifi amps doesnt have the power output as what those pro amps have, in this case the ucd2k is comparable, but i think not many have used them.

 

and im not sure that Roger have done direct comparison from those pro amps to ML and ncore

Edited March 28, 2014 by henry218

[henry218]

Unwise       EDIT:   I mean you should find out yourself... that wasn't a stab at Roger   (Hi Roger!   )

 

Luckily for professional grade products mysteries are unusual.   The truth is out there  

well at least he read the topology and seems very familiar to pro amps, so i can take his word. i dont know much about amps .

[lemnoc]

but the thing is, why AB should sound better in such a limited freq, i mean if we compare current capability of the 2 topology that would be fair.

 

what i mean is, domestic hifi amps doesnt have the power output as what those pro amps have, in this case the ucd2k is comparable, but i think not many have used them.

 

and im not sure that Roger have done direct comparison from those pro amps to ML and ncore

 

I believe Genesis loudspeakers use Hypex class-D amps in their amps but not 100% sure it is Hypex. In any event they can't be as bad as some people are alluding to.

 

http://www.genesisloudspeakers.com/grefamps.html

 

Also be wary of the power ratings of some of the pro amps. You'll find they are way overinflated and have no bearing to the real continuous average power which is usually buried in the fine print somewhere. I believe that the Hypex UcD 2k will deliver a genuine 2000 watts into a 4 ohm load as long as you heat-sink them properly.

 

Also be careful when using those Hypex modules as there are some lethal; voltages present on the boards !!

 

cheers

[henry218]

yeah, i need to put some heatsink on the module, seen some pic on the net, small size should be enough, and can join the 2 modules together.

hypex rate the ucd2k output at 1%, but in any case i doubt if i ever use 3kw.

[lemnoc]

yeah, i need to put some heatsink on the module, seen some pic on the net, small size should be enough, and can join the 2 modules together.

hypex rate the ucd2k output at 1%, but in any case i doubt if i ever use 3kw.

 

They are rated at 3200 watts transient power. However you will need two power supplies if you are going to run two modules otherwise you will exceed the ratings of the power supply and it will probably shutdown. The multiple amp connections on the SMPS3k are for running multiple UcD700 modules for frequencies above 100Hz.

 

regards

[henry218]

thanks lemnoc,

 

i've emailed hypex about this, let see what they will say. in general their smps can power multiple modules but im aware of your concern as they wrote in their manual.

 

cheers

Henry

[davewantsmoore]

but the thing is, why AB should sound better 

 

Oh, I was making no claims about sound quality.

 

... only that your claim they were of "Class D" type was not correct   (and that Class TD or H are not like Class D)

[henry218]

Oh, I was making no claims about sound quality.

... only that your claim they were of "Class D" type was not correct (and that Class TD or H are not like Class D)

i was referring to Roger's comment

[lemnoc]

but the thing is, why AB should sound better in such a limited freq, i mean if we compare current capability of the 2 topology that would be fair.

 

what i mean is, domestic hifi amps doesnt have the power output as what those pro amps have, in this case the ucd2k is comparable, but i think not many have used them.

 

and im not sure that Roger have done direct comparison from those pro amps to ML and ncore

 

Some of those amps that use tracking down converters purposely delay the audio signal so the tracking power supplies have time to track the audio signal otherwise the output devices could saturate. This means there maybe upwards of 1-2 ms delay in the audio path which could be a problem for active speaker systems. I've heard this is a problem with the BASH system but not sure about the others.

 

regards

[henry218]

lemnoc,

actually your description of BASH align with my experience. i thought it was the bass horn problem, i didnt have the chance to use diff amp so i cant know for sure.

what i know for sure my little TH doesnt have that delayed "sound"

[davewantsmoore]

This means there maybe upwards of 1-2 ms delay in the audio path which could be a problem for active speaker systems.

 

If the delay were constant then this isn't an issue if the delay can be compensated in the system (physical alignment, or signal delay to other channels which require it).

 

If they delay is not constant, then this is completely unworkable as an amplifier.

[henry218]

well just got the reply, its good to go for 2 ucd2k and 1 smps3k

[davewantsmoore]

[henry218]

i know, the question is wether i need all that power, but i do experience a significant bass quality improvements with higher power amp, but not sure if from 400w to 1500w will have big differences.

 

and again for $900 we can get a pretty much 2ch high end sub amp with known reliability