Kb3 wattage

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Peaveyman2016
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Kb3 wattage

Post by Peaveyman2016 » Wed Jun 22, 2016 7:35 pm

I am new to amps. I saw a kb3 with 200 watts atamped on the metal specs plate on the back of it, but all the kb3 online say 60 watts.

Can someone explain why? Were the two wattage ratings referring to different things or did kb3 used to have 200 with or what?

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Enzo
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Re: Kb3 wattage

Post by Enzo » Fri Jun 24, 2016 1:21 am

I am not sure what you are looking at, none of my KB3 records show those ratings, mine are different.

However, yours is a common question. Over by the power cord entry it says 200w, probably also says something like 60Hz, and 120vAC. What that means is the thing runs on 120v AC power at 60Hz power frequency (US standard), and can use up to 200 watts doing its job. The amplifier puts out only 60 watts of power to the speaker. Since the thing is not 100% efficient, it takes 200 watts to make 60 watts come out the speaker.


This is like a car with a 400 horsepower motor. The motor can make up to 400 horsepower, but it can only get 250 horsepower to the drive wheels.

Some of the 400 HP goes into fighting friction, some into driving the water pump, the oil pump, the air conditioner pump, the power steering and brake pumps, charging the battery system, running the lights. Your tires drag on the road, your mirrors on the sides can suck up a few horsepower. This is analogous to your amp wasting power as heat mainly in the circuits.

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