What happens if I plugged a 20amp unit..15amp outl

If you mean one that takes a 20 amp power cord into a 15 amp cord I do that with my NuVista M3 amp, which produces 300 watts a channel. I used a Voodoo adapter so I could use my PS Audio Statement power cord and the results are much better than the original 20 amp cord.

Rapogee,

You used the word "requires". Did you choose that word or was that from the manufacturer's owner manual. For a required 20 amp receptacle/20 amp branch circuit the FLA (full load amps) would have to be greater than 12 amps. That would be a pretty powerful amplifier.

Sometimes a manufacture may "recommend" that a 20 amp branch circuit be used to get the best performance from his amp but it is not "required".

A couple of ways to check for sure....
If the unit does require that it must be connected to a 20 amp branch circuit the factory cord that came with the unit will have a 20 amp plug on the end of the power cord.

Check the data info on the back of the unit. Usually near the power inlet it will give the AC voltage and power consumption. FLA, VA (volt amps), or watts.
The max connected load that can be plugged into a 15 amp receptacle is FLA 12 amps, 1440 VA or 1440 watts.

Yes Jea, this Krell Power amplifier requires specifically a 20 amp outlet like most bigger Krell Power amps.I was told that it will keep tripping the circuit so..just wanted to make sure, is this true?