It's a 1 amp fuse. This is the first time that I've see the protection device (whether they used a resistor or a fuse) in that location. It's generally near the RCA jacks so that there is no loss of ground to the rest of the circuit when the fuse opens.
Is the bias set too high on the side with the drivers?
Is the bias set too high on the side with the drivers?
The following image shows the location of the fuse in the ZR1000.
If this amp is like the ZR1000, the screw between the transformer and the inductor has it's pad connected to the secondary center-tap. If you use a metallic screw, it shorts the secondary CT to the heatsink. If you mount the amp to the chassis of the vehicle, you'll get engine noise. This problem can be eliminated if you use a nylon screw and make sure that the cylindrical standoff is in place around the boss in the heatsink. This also applies to the ZR600.
If this amp is like the ZR1000, the screw between the transformer and the inductor has it's pad connected to the secondary center-tap. If you use a metallic screw, it shorts the secondary CT to the heatsink. If you mount the amp to the chassis of the vehicle, you'll get engine noise. This problem can be eliminated if you use a nylon screw and make sure that the cylindrical standoff is in place around the boss in the heatsink. This also applies to the ZR600.
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