class g/h amplifiers

[baaudio]

so im familiar with class a/b and class d. but i just saw today that the cerwin-vega stroker 2000.1 is a class g/h? whats the deal with these?

[Ray]

arc se4000

and many others have been using it for years

[Boon]

If I remember right they have lots of secondary taps on the transformers which give you loads of different rail voltages. Then it passes the load between rails as the output voltage rises. I think it's a bit more efficient and you can have a lot more secondary voltage capacitance but otherwise I can't remember why they do it...

[Mr. Darkjustice]

If I remember right they have lots of secondary taps on the transformers which give you loads of different rail voltages. Then it passes the load between rails as the output voltage rises. I think it's a bit more efficient and you can have a lot more secondary voltage capacitance but otherwise I can't remember why they do it...

so what does that mean? sorry i suck with technical talk lol

[Ray]

sound close to a/b, with the perks of current in D class

[wfw5607]

Class G amplifiers (which use "rail switching" to decrease power consumption and increase efficiency) are more efficient than Class AB amplifiers. These amplifiers provide several power rails at different voltages and switch between them as the signal output approaches each level. Thus, the amplifier increases efficiency by reducing the wasted power at the output transistors. Class G amplifiers are more efficient than Class AB but less efficient when compared to Class D, without the negative EMI effects of Class D.

That what info i found about those types of amps. cause im like you i haven't heard of them before

[wfw5607]

Class H amplifiers take the idea of Class G one step further creating an infinitely variable supply rail. This is done by modulating the supply rails so that the rails are only a few volts larger than the output signal at any given time. The output stage operates at its maximum efficiency all the time. Switched-mode power supplies can be used to create the tracking rails. Significant efficiency gains can be achieved but with the drawback of more complicated supply design and reduced THD performance.

idk what the advantage would be of an g/h amp

[bassl0va]

Class H amplifiers take the idea of Class G one step further creating an infinitely variable supply rail. This is done by modulating the supply rails so that the rails are only a few volts larger than the output signal at any given time. The output stage operates at its maximum efficiency all the time. Switched-mode power supplies can be used to create the tracking rails. Significant efficiency gains can be achieved but with the drawback of more complicated supply design and reduced THD performance.

idk what the advantage would be of an g/h amp

*cough* wikipedia *cough*

I'm guessing that most of these are mainly used to sell stuff. I'm sure that the specs are so close that you are better off going for class A/B or class D, depending on what you need.