AMP Car Audio & Video - Page 9 - Recent Questions, Troubleshooting & Support

More than likely yes..

It usually means your speaker has popped and you may have to get a new one.

if they 4 ohm speakers and they are rated for 1800 a piece( thats hard to believe ) then parallel them and you need to ell us if thats the speakers peak power( which it has to be.. ) Now tell us their average power dissipation capability and impedance.. You'll geta safe answer

Check the thickness of the power cable to avoid power loss.

Yes it will work .

When in doubt go low. I'd recommend buying auto fuses that range from 8 to 40 amps. Start with a lower rated fuse and if it blows just go up one level until blown fuses are no longer a problem.

RMS Power Range : 240-440 Watts http://www.onlinecarstereo.com/CarAudio/p_11192_Precision_Power_PPI-5440.aspx

You may find one on here that is similar enough to get you started....just a thought. http://www.schematicsunlimited.com/h/harman-kardon