high efficiency sq amp

[jagblazer01 10+ year member]

what about precision power??

 

[genxx 10+ year member]

^^would have to disagree...A class is all sound no efficiency,A/B is preamp a class amp B class..so sound+a good dose of efficiancy..he specified that he needs it for components not sub, not sure just how much sound u can get at 5-10% thd no matter how much power u get out of it..

Here is some info on top of what squeak9798 told you to help you understand the classes better.

The new ARC KAR amps are class G/H except for the 6 channel which is class A/B.

Class G

Class G improves efficiency in another way: an ordinary class AB amplifier is driven by a multi-rail power supply. A 500 watt amplifier might have three positive rails and three negative rails. The rail voltages might be 70 volts, 50 volts, and 25 volts. As the output of the amplifier moves close to 25 volts, the supply is switched the 50 volt rail. As the output moves close to the 50 volt rail, the supply is switched to the 70 volt rail. These designs are sometimes called "Rail Switchers". This design improves efficiency by reducing the "wasted" voltage on the output transistors. This voltage is the difference between the positive (red) supply and the audio output (blue). Class G can be as efficient as class D or T. While a class G design is more complex, it is based on a class AB amplifier and can have the same clean characteristics as well.

Class H

Class H is similar to class G, except the rail voltage is modulated by the input signal. The power supply rail is always just a bit higher than the output signal, keeping the voltage across the transistors small and the output transistors cool. The modulating power supply rail voltage is created by similar circuitry that you would find in a class D amplifier. In terms of complexity, this type of amplifier could be thought of as a class D amplifier driving a class AB amplifier and is therefore fairly complex.

http://www.caraudiomag.com/specialfe...wer_amplifier/

I was going to cut and past but you can just click the link and read.

http://en.wikipedia.org/wiki/Electronic_amplifier#Amplifier_classes

99% of class D's currently on the market are great for subs or comps.IMO

Alpine PDX and Pioneer's PRS which is based on the Bang and Olufsen's ICEPower which is being used by several manufactures now.//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

You also have class T or Tripath.

Most class D amps are 80% to 95% effecient and Class A/B 50% to 65% from what I have seen and understand.//content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

The new class D techonolgy has come a long way and has the THD numbers to back it up if you are worried about that issue.//content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif

5-10% thd no matter how much power u get out of it//content.invisioncic.com/y282845/emoticons/crazy.gif.c13912c32de98515d3142759a824dae7.gif

If this statement you made is aimed at class D you need to get with the program and put down whatever you are smoking.

 

[mile098 10+ year member]

lol, got burned...in anycase i dont like how class d works...heard it on subs and A/B as much as its 'inefficient' does have a certain roundness in sound that i need...im currently running rf bd 1000.1, great amp, but...dont know, theres a certain stiffness to it that i dont like

 

[boardroomjimmy 10+ year member]

I would have to say my jl300-4 sounds better than my alpine pdx 2-150. I was a little disappointed in it. I may use it for a set of 8"mid-bass and find something else (class a/b) for up top.