Class A Amplifiers and impedance dips


Do all pure class A amplifiers double in power with each halving of impedance?

mitch
128x128mitch4t

I love this website!!! ....What a reservoir of knowledge and help.

Thanks guys for your help.

mitch

Is there an agency that dictates what class A or other designation actually consists of? How does one know if a manufacturer claims class A for their amp that it really is and does any agency ever check? I am not doubting any information here just would much prefer to read an authoritive white paper if someone can point us.

Thanks,
F#$k specs! It's all about what an Amp CAN do and what an Amp CAN'T and it's completely upto YOU to judge.
chryslers_rule - You don't want the government in your stereo, do you? Class A amps run the output transistors ALL the time. This allows purity of signal. The disadvantage is the transistor that is left on all the time runs very hot. This means you have to have BIG heat sinks and can't run as much current through the transistor. Class AB amps use a pair of output transistors running in tandem. A turns on, B turns off. B turns on, A turns off. The advantage is you can cool off B while A is running, so you can run B at higher levels while it is on. You don't need the huge metal cooling fins (heat sinks). This means more watts at a cheaper price. The disadvantage is the switching distortion incurred flipping back and forth. As computer technology became cheap and plentiful this has become much less of a problem, because the switching is more precise. Ask morbius for a second opinion. And tell him to WATCH OUT FOR THE ID!