Hegel Amplifiers


Tried asking this on various forums, but did not get enough information. If anyone visited the recent audio fests and have listened to Hegel amps - especially the H20 - please describe how you found the sound of the Hegel amps. Any comparison? This is one amp I have shortlisted besides the Parasound A21. Also considering Classe 2200. Did not hear any particular one.
Any feedback is appreciated.
128x128milpai

Showing 4 responses by magfan

My panels are fused at 4amps. Even if the low end draws another 4, that is 8 total. And Maggies are considered current hogs. 60 amps? 130 amps? What's the diff? And, FWIW, what is the voltage at the mythical 60 amps? 5v? 10v?

a poorly designed 'balanced' circuit will be worse off than a conventional circuit properly executed.

more less than meaningful specsmanship.
Strictly my Opinion. Peak Ampere ratings are near-real world- meaningless.
NO speaker can take such current.

Output devices, as near as I understand, have what is called a 'safe operating range'. Go out of that envelop, and the devices either fuses or shorts. Either way, you are out of action. A fuse may not be quick enough and therefore speaker protection circuits, if employed should take that into account.
From Wikipdia::
Safe operating area
The safe operating area defines the combined ranges of drain current and drain to source voltage the power MOSFET is able to handle without damage. It is represented graphically as an area in the plane defined by these two parameters. Both drain current and drain to source voltage must stay below their respective maximum values, but their product must also stay below the maximum power dissipation the device is able to handle. Thus the device cannot be operated at both its specified maximum drain current and maximum drain to source voltage. [2]

So, if you redline a device in current, you have to have lower voltage so as not to exceed wattage.

Now, forget all this nonsense and buy whatever pleases your ears. Any particular build philosophy has both good and bad implementations. Class (?) is no guarantee of anything. Specsmanship is for ad writers to compare what's in there pants.
Good link.
Those kind of 'quality' numbers don't impress me as much as the raw data, however. I like to see both impedance against frequency and Phase Angle against frequency combined into a 'Smith Chart'. This says it all, electrically speaking. Phase Angle is the 'missing link' in the good load / bad load debate which rages in the speaker postings. My current hungry panels, though no less than 4 ohms, are really not a bad load. Moderate phase means that more amp power actually makes it to the room as sound.

For some reason, people really LOVE numbers. All those awful sounding Japanese amps from the 80s, with incredibly low distortion numbers and high NFB didn't alway sound good, or sometimes even 'right'.

Is it time to begin discussing power supply regulation? A couple generations of NAD equipment ago, you could get an amp with an astounding 6db of dynamic power. So, what do you want? Pure RMS with little headroom? Or would you like a smaller RMS rating with huge peaks? I have no answer, only asking the question.

Enjoy whatever you end up with, That's all that counts!