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Need help understanding tube wpc

My equipment has always been solid state so bear with me (i'm sure this has been asked before but having trouble finding the threads) . I don't follow the wpc differences between SS and tubes and how to match tube power with speaker efficiency to ensure that they'd be driven okay.

Thanks
facten

Showing 3 responses by rlwainwright

rlwainwright
1,904 posts
 
A watt is a watt. Watts = Volts x Amps.

The equation has no idea whether you used a tube or a transistor. SS amplifiers usually have more current (amps) and tube amplifiers usually have more voltage, and their interaction with the speakers impedance at various frequencies account for the differences you hear.
rlwainwright
1,904 posts
 
D_Edwards offered:
>>Yamamoto tube amplifier look at the harmonic by products which are ADDED to a simple 50hz signal, now these byproducts do not effect the voltage or WATTS, so in this case the tube 100 watts offer a great deal more sound than the SS watts. <<

Ummm, D, you may want to take ANOTHER look at those graphs, the Yamamoto is being measured at 100 mW, that's 1/10 of a watt versus the Halcro being measured at 100 W. The Halcro is pumping out 1000x the wattage. And, why in the world would you want your amp ADDING distortion to the signal?

Frankly, the Yamamoto looks like a WAY under-powered POS to me.

-RW-
rlwainwright
1,904 posts
 
As usual, Sean nails it!
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