Electrical Question - dumb one - but a good one

no, your 3-prong plug is fine, you just need to change out the bit at the component.

you can also get adapters that will convert a 15 amp to a 20 amp if you want to try out the cord before you mod it, i've found that using good adapters on power cords doesn't do much negative...

good luck!

The power consumption of any electronic device is in VA.
This is corrected for power factor.
You get BILLED for watts, or KWH (kilowatt hours) but consume VA, which except for a resistive load is always higher. Power companies will bill large, typically industrial users slightly more (surcharge) for such low PF loads.

What does the plate say on the equipment? In general, I'd be reluctant to convert a device with a 20amp connector to a 15 amp service. If this is a large power amp with 'ample' capacitance, you may get a pretty good turnon surge, even if you never crank it up or have higher sensitivity speakers.

The wall receptacle is fine as is. Putting a 20 amp receptacle in the wall will change nothing current wise,but will give better grip on the prongs . Get a new chord that is 20 amp iec at the unit end. Only reto fit if your sure the cable is rated for it like Al said. Cheers

Whether a receptacle (of identical brand and grade) is 15A or 20A makes no difference in grip on the prongs. Both receptacle types are of same current carrying capacity and design internally, only the face is different, having the "T" shaped neutral slot.

Even dead-front GFCI's are just a regular GFCI receptacle with prongs on the inside, even though they (obviously) aren't being used.

Manufacturers don't waste money on tooling to produce one quality receptacle for 15A and another for 20A within the same grade. You get difference in grip only among grades and brands, not rating.

Gbart , in the home I had built the outlets in kitchens are all 20 amp by code . They do have a stiffer grip on the prongs in my experience. 20 amp outlets at least in my area and experience are a better grade than the standard 15 amp version. The ones I installed myself when finishing my basement were made by the same manufacturer as the 15 amp version in the rest of the home and they did provide a better grip. I am sust speaking from my experiences. I worked for 17 years winding transformers for Hammonds who at one time owned smith and stone who manufactured receptacles of all types and labelled with different company names so I have had first hand experience. Cheers