Wiring Question

[SuperSaeYoung]

Lets say I have a 800 watt amp with 4 channel, 2 D2 4ohms 400 RMS sub. The amp is rated for 400 watts @ 4 ohms bridged. Is it okay to wire them 2ohms per sub bridge while setting the gains low?

What I understand from OHM law is that E=IR, E=sqrt(wr), I=E/R, and W=EI.

2 Ohms

28.28v=sqrt(400watts*2ohm)

14.14a=28.28v/2ohm

399.93w=28.28*14.14a

4 Ohms

40v=sqrt(400watts*4ohm)

10a=40v/4ohm

400w=40v*10a

Does this logic work out?

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[SuperSaeYoung]

Bump

 

[Falcons 5,000+ posts]

if you have two subs each d2, you could either wire to .5 ohms, 2 ohms, or 8 ohms, so no those subs are not good for that amp.

 

[SuperSaeYoung]

if you have two subs each d2, you could either wire to .5 ohms, 2 ohms, or 8 ohms, so no those subs are not good for that amp.

So even if the wattage is matched to the sub, it still wouldn't be a good idea to wire them under the rated ohms?

 

[Falcons 5,000+ posts]

So even if the wattage is matched to the sub, it still wouldn't be a good idea to wire them under the rated ohms?

correct. this causes the amp to work harder and therefore gets hotter and hotter.