Kenwood KAC-8401 light goes from blue to red when turned on

Follow the link and use the first diagram which illustrates wiring the subs to 2.66 ohms http://www.the12volt.com/caraudio/woofer_configurations.asp~Q~3~I~42

Remember that that amp is one ohm stable so you will not be getting the most out of that amp with that subs set up. The subs will only see 650 to 850 watts total...so each sub will only see about 215 - 275 watts a piece. Find out what the RMS wattage of your subs are each an determine if the wattage I mentioned above meets those requirements.

when i was running my sub off bridge mode this kept happening to me. I ended up just running two subs and for some reason the fuse stopped blowing. i think there is something wrong with these amps.

your amp has a output section problem,contact eric @ Capital Audio & Electronics Repair in Tallahassee,FL 850-339-1130 wee repair all brands and models

My best guess is that it would be your ground wire or even the power into your amp. I would check all the connections going to and from your amp

you can run 2 subs given that you dont go over 2 ohms of resistance and that the subs are rated at 1000 watt max each around 4 or 500 watt rms. if your not sure about ohms dont bridge it and get single voice coil subs. this amp is capable of about 700watts constant power 1200 max spike if the voltage stays at 12 or higher.

your amp is blown up

i have the same amp with the same problem.....your best bet is to do what i did get a better amp(audio pipe,spx,kicker,punch,etc) do not get pioneer amp or sony anything

It should be better to use the Pioneer GM-7200M Amp with your subs.

For 8 ohm setup hook up this way:
Amp out+ to Sub1 +
Sub1 - to Sub 2 +
Amp out - to Sub2 -

For 2 ohm setup hook up this way:
Amp + to Sub1 +
Sub1 + to Sub2 +
Amp - to Sub1 -
Sub1 - to Sub2 -

HI RLF,

You might want to turn your Gain setting down a little. Also Look to be sure you have enough air flow around the amp. If it cannot breath, the heat from the amp will build until it wigs out. Use your Ingenuity to get more air to the AMp.

check transistor of the unit 1 or 2 tans. bad use a tester. the unit is overload protected. replace the deffecteve parts