wiring ?

Would 5 D2 subs give a .5 ohm load, because 4 d2 will give you 1 ohm and 1 d2 can be wired to 1 ohm.
1 ohm and 1 ohm will give .5 ohm. is this right or am i wrong?

yes except that 5th woofer wired to 1 ohm will get half of all the power.

while the other 4 woofers wired to 1 ohm combined will share the other half.

So, if you wire each woofer in series (4 ohm), then parallel all 5 woofers...
1/4 + 1/4 + 1/4 + 1/4 + 1/4 = 1/Final Impedance
5/4 = 1/Final Impedance
Final Impedance = 0.8

If you wire each woofer in parallel (1 ohm), then parallel all 5 woofers...
1 + 1 + 1 + 1 + 1 = 1/Final Impedance
5 = 1/Final Impedance
Final Impedance = 0.2

These are your 2 options. 10 coils can be factored into 1x10, or 2x5.


Other option: Don't use one coil, and expect slight loading issues. One woofer will be getting 2/3 of the power of the rest... but you can get 3x3, for 2 ohm load or 1/2 ohm total. If you stick with 4 woofers, alot more options open up.

I agree. go with 4 woofers