You might want to read more about this: http://www.atma-sphere.com/Resources/Paradigms_in_Amplifier_Design.php An amplifier does not have to double power to sound musical and to also have a lot of authority. |
Bifwynne, Our amps don't use any feedback at all, yet they can work quite well with speakers that have some pretty wide impedance variation. It all has to do with the intention of the designer of the speaker. ZOBEL networks are one way you can get a zero feedback amp to work with a speaker that is expecting the amp to have a much lower 'output impedance'. |
I have seen some pnm impedance measures in stereophile that show wide impedance flucuations from 4 to 16 ohms at various frequencies. Far frm the constant high impedance that an amp like that would probably do best with. That depends on the amp. If it is OK with 4 ohms and has a 10db of feedback or more, its probably not an issue. Also, Sometimes you can get by without the feedback if the higher impedances also occur at higher frequencies. A ZOBEL network might just take care of the extra output. |
