tell application "iTunes"
	tell EQ preset 1
		set band 1 to -3
		set band 2 to 0
		set band 3 to 3
		set band 4 to 1
		set band 5 to 0
		set band 6 to -1
		set band 7 to 1
		set band 8 to 3
		set band 9 to 6
		set band 10 to 5
		set preamp to 0
	end tell
end tell

A 'perfect' iTunes equalizer setting.

AppleScript