Question about Car Audio & Video
Let me address the wiring kit first. No the higher wattage kit is not a problem however you will need to change the inline fuse to an amperage that is more suitable for 250 Watts. The amps main fuse will be able to protect the power supply but no need to have a larger fuse than needed.
Now lets talk about the fuse. First off what kind of amp is it? Just for my knowledge. What is the rated impedance that amp can drive bridged mono or stereo (however you have connected it) If the total impedance presented by the woofers is lower than what the amp can drive the amplifiers power supply will demand more current than is designed for. I guess what I need to know is the model of speaker, model of amplifier and size of the inline fuse (right next to battery). Initial diagnosis would say the load on the amp is too large.
Rule of thumb for calculating impedance. The easy way if you have two or more characteristic impedance that are equal then you can add them and divide by the number of impedance to get your total Load however the formula is as follows,
1/((1/Z1)+(1/Z2)+(1/Z3)+(1/Z4)) or (Z1^-1 +Z2^-1+Z3^-1+Z4^-1)^-1
(They are the same thing, just written differently)
In electrical terms Z is your impedance, the negative exponent just means reciprocal.
So in your case if you have 2 dual voice coil subwoofers with a 4 ohm per coil impedance. If you parallel the two coils you would have a 2 ohm impedance. Then if you parallel the two woofers you would have a 1 ohm impedance. This is to low of a load for your amp to drive.
Let me know
Posted on Jan 31, 2010
Testimonial: "its a power acoustic amp i think the fuse is a 70 watt fuse was size do i need to put in idk about the subs just that there 12in kicker comps"
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Posted on Jan 02, 2017
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