That's weird.
You could use an accessory or ignition live instead, it would just mean that the amp would always be on whenever the car was, rather than being switched by the headunit. If you aim to always have the system on then it makes little difference, but probably not ideal.
You could use an accessory or ignition live instead, it would just mean that the amp would always be on whenever the car was, rather than being switched by the headunit. If you aim to always have the system on then it makes little difference, but probably not ideal.