klipshorn speakers

my son likes mcintosh! but will the sound be better with a mc602 is what i'm asking! 

No, it will not sound any better. The power advantage is meaningless as the MC7300 will easily drive the Khorns into utter distortion and burst both your son's ear drums. I think a Class A solid state amp would be the way to go. Anything more than 100 watts/ch  is a waste of money.

If your son is set on McIntosh I suggest he look for a properly refurbished MC225 (vintage tube power amp with approx. 25 watts/channel).

I've listened to it in 2 Khorn systems and it was a great match, though both systems used tube preamps as well.

DeKay

@larryi  Has it 100% right. Mac makes great looking gear but other brands make great sounding music. 

Sir, I’m sad to say, you and his schools have done a lousy job of teaching your son how to think.

He ought to be able to figure out his existing 300wpc is far more power than those highly efficient speakers need, even in a very large space. And, he’s not smart enough YET to figure out he will spend MANY YEARS wishing he did NOT listen too LOUD!

He is probably damaging his hearing, as many of us regrettably did! ..........................

I agree, go TUBES. Want McIntosh, get a vintage McIntosh Tube Preamp and Tube Amp, I would chose the mx110z preamp tuner/preamp (like mine), and the slightly larger MC2275, 75wpc, more than needed, but in case he changes to less efficient speakers in the future.

Got a fetish for big blue meters, get over it.

best of luck,