#11
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Yes, I get all that, I was just trying to state the commonly accepted definition of headroom in an amplifier. Re your car analogy, they would be 55mph rated tires that had the capability to be punched to 70 for brief durations.
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Tony D'Agostino Momentum S250 MxV & HD pre; Linn Klimax Organik DSM, SonicTransporter, EtherRegen; Acoustic Signature Typhoon Neo, Koetsu RSP, Boulder 1108; Sf Il Cremonese; Shunyata Everest, Altaira, Sigma & Alpha v2 |
#12
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‘If the peak or dynamic power output rating is double the amount of the stated or measured RMS, Continuous, or FTC power rating, this would be an approximation of 3db dynamic headroom.” Of course we all know that’s not twice as loud. To be twice as loud, it would need to increase power by a factor of 10. What I’m confused about is when audiophiles talk about dynamic headroom when both the amplifier and power line supplying it with current are well within the operational zone and not at the limits. The bass control and overall feel of amp to speaker interaction has much more to do with damping factors and current delivery of the amp. That has to do with the testicular fortitude of the amp itself. Capacitive storage, robust transformer and a beefy power supply. |
#13
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My experience, after trying out stacks of poweramps, is that the trafo`s just has to be big. But not neccesarely that big in VA or watts but big in wire-diameter. Current is like water, and lower voltage means we need coarser pipes to compensate. Trafo`s primary windings should be ca the same diameter as what comes from the fusebox, and trafo`s secondary windings should then be big enough to compensate the voltagedrop.
And of course, speakerwires a.s.on must be same size if this shall breathe and bloom. This should be the key to make what will be concidered as a "fast amp" while cheaper trafos with thinner windings might be compensated by using a huge capacitor-bank to help them breathe. But this "breathinghelp" will necessarily come a little afterwards and make the amp a bit slower or not so weightless, light on it`s feet. This post has been made by using google translator |
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