Why does my KAC-9105D go straight to protect mode?

SOURCE: how do i get my kenwood kac-8402 out of protection

first thing first open it up ull need to check ur heat sinks and capacitorsand see if any of them are blownd if there are blowend replace the bownd once. and try it

Matthew Spark

• 1066 Answers
• Posted on Nov 07, 2010

SOURCE: My Kenwood KAC-9105D amp quit working in the

protection mode engages when there is either a crossed/shorted speaker wire, an incompatible speaker or a blown speaker with fried voice coils.

check your wires for shorts and/or loose strands of wire, your speaker ohmage (should be single coil, 4 ohm) and your speaker's operation. if you push the speaker in about an inch or 2 and there is some resistance, like its sort of scratchy when it moves, then the speakers voice coils are fried. speakers should push in and out freely, with no scratchiness or resistance, until they bottom out at 1 to 2 1/2 inches.

if it is not the speaker or the wiring, then the amp is damaged.

SOURCE: How to bridge a kenwood kac-9105d

Are you referring to something like this, using two different amps? It is a mono amp, meaning there's one amp in the box.
"KAC-9105D also has a Dual Mono Drive connection that allows you to strap two KAC-9105D amps together to power a single subwoofer."Quoted fromhttp://www.kenwoodusa.com/Car_Entertainment/Amplifiers/KAC-9105D

Here's a link to a page out of the Yamaha Sound Reinforcement book. the top shows a stereo amp (1 box, two different amps inside) hooked up to drive two different speakers, which is known as 'stereo' mode.It then shows the two amps hooked to the opposite sides of the same speaker, which is known as 'bridge' mode.http://books57.net/ampOuts.gif

Any help?