Ok I've almost got it..... This is the list of things that make up the N1500 crossover according to Mark,
Some values are a bit hard to read so I've also listed them here:
R1 15 Ohm 10W
R2 25 Ohm
C1 14uf
C2 3uf
L1 1.5 mH

so...R1 is Resistor 1 and it's a 15 Ohm 10 watt?
R2 in the Schematic has a wire connected in the middle? is that indicating that it's the "L" Pad attenuator thingy?
C1 is a 14 uf Capacitor right?
C2 is a 3uf Capacitor?
and what about the L1 thing? since it's in mH does that mean it's a coil of wire? what does the "L" stand for? and it says something about 17 to 23 or 17623 Under it in the schematic? does anybody know what that means?
Sorry if I'm seeming rather retarded but this is my first foray into electronics. But I'm trying.