JBL 615

1000W is not real power.  It says right on the product page that it's 500W continuous.

500W is still more than 430W and that is fine for reasons others explained.  430W is SINEWAVE power while 500W is MUSIC power.

Music is less energy dense than sinewaves so this is completely normal.

Music power can be up to about 8 times higher than sinewave power but this would assume 100% efficient amplifier with uncompressed program and no clipping.

ultimately both the 500W figure and the 430W figures should be of interest to you.  the 1000W figure is just marketing nonsense.

if this was a high-end fully-professional speaker ( as opposed to entry level / prosumer / amateur / PA speaker ) you would not see that 1000W figure at all - only the 500W figure.  the cheaper the speakers the more the power figures are inflated because the customer for the cheaper speaker is less knowledgeable.

that said JBL is a reputable company so they will not lie outright - only BEND the truth a little bit.  this is why you get both the 1000W and 500W figures.

i think EON are good for the price as long as you use a high pass filter and a subwoofer.  can't comment on reliability of the amplifier module but you might be able to find replacements as it's a popular speaker.