dégouté !!! je viens de recevoir l'ampli Behringer epq 2000

 

In a Class of Their Own

The secret to the EPX series’ incredible power-to-weight ratio is their use of a switching-mode power supply combined with Class-H topology. Switching-mode power supplies work on demand. Instead of constantly working at full power and dissipating excess power as heat, they only ramp up the power output when needed—thousands of times per second. Considerably more efficient than traditional power supplies, switching-mode power supplies are small and light, yet deliver ample power.

Think of a Class H amp as a car with two engines (in amps, you call them “rails”). One engine runs all the time. The other runs only when musical peaks demand extra power output. An EPX Class H amp only generates a fraction more power than is immediately needed while the output stage operates at its maximum efficiency all the time.

And just like in today’s hybrid cars, the efficiency of this dual system is far greater than having one engine or rail that must operate all the time. EPX amps don’t waste power. Class H amps don’t waste power, require much smaller heat sinks and much lighter power transformers.

http://www.behringer.com/EN/Products/EPX2000.aspx

Par contre, ça me fait rire la façon dont c'est amené, à croire que la classe H est une nouvelle techno... alors que c'est juste le switch d'alim qui est plus simple par rapport aux amplis à alim trad où on fait ça vi un jeu de diodes.