I heard Sasha3 at AXPONA last month, one of the best sounds in the show with XA30.5. That amp easily doubles into 4 ohms. Sasha isn't that tough a load (3ohms.) I have also heard it with AR Ref 110, very emotionally communicative, and ballsy. Magnificent on orchestral music.
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I would definetively take the stereophile measurements seriously ,i consider it a magazine with a more scientific aproach Andromedaaudio, take a look at this link: http://www.atma-sphere.com/papers/paradigm_paper2.html Stereophile does not recognize the Power Paradigm, even though we see it all around us in high end audio today. IMO, their failure to take this into account invalidates some of Atkinson's comments, although I often (but not always) find his measurements useful. IOW, Power Paradigm technologies will not always look good using Voltage Paradigm measurements! The Wilson speakers are an example of Power Paradigm technology. This is why the Sasha is easy to drive with tube amplifiers that otherwise might have grave difficulties with that low impedance in the bass. |
Loudspeakers designed under this paradigm are said to be 'voltage driven', as they expect the amplifier driving them will produce constant voltage despite the speaker's variable load impedance Why should a certain speaker (expect to) be designed according to this paradigm , is that a design feature which they had in mind ,as its not a must for a crossover to function as far as i know ? i personally try to design a speaker with the highest impedance in the crossover as possible just to avoid problems , but not by using artificial networks . If the sasha is a very tube amp friendly load ,i dont know personally. i do know of certain speakers that have certain networks to accomplish a artificial smooth/higher imp. I see it more in the way that ,if a certain voltage level doesnt drop with a heavier load(lower speaker imp ) than it is automatically shown that that amp is capable of instant greater current delivery meaning better loudspeaker unit control (important for dynamic swings for example) . What also plays a rol is i think the musical taste of somebody , big/loud dynamic music sucks up more current than a quiet jazz combo for example ( i think that i have not measured that) Does it hurt to have a big powersupply /constant voltage/ power doubling amplifier to lets say 2 ohms, i think absolutely not . greeetz hj |
I want add one more thing , a lot off loudspeakerunits that are used by manufacturers today (I know some improve/make there own) have increased efficiency due to their design and neodymium magnets drive for example , this will usually lift the overal efficiency of the speaker and with that also the need for high power /high current (transistor)amps . And become more tube friendly |
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