I live in Australia and bought a Boston XB6 sub from USA, expecting it to have a voltage selector on the back panel to switch to our local voltage of 230 volts, which it does not. I looked at the inside of the amplifier module and saw on the power supply board two jumper connectors with positions marked for 120v and 230v. If I change these to the 230v position is that all that is required to operate it on 230 volts?
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Hello Check the speaker of the Sub-Woofer. It is a common fault for sub-woffers that its lead wire will get loose contacted from its cone paper. You can repair this with caution. The lead wire can be bought from most oof the electronic spare part shops at your twon.
If you look at the power lead, you will notice it is the regular "kettle plug" shape, but it only has two pins (live and neutral). There is no earth connector.
You have to ground the sub to your receiver. This is done by running a RCA connector connected to one of the unused connections to the amp.
However, this doesnt ALWAYS solve your problem. As in my case. I have a Pioneer 7.1 receiver, which is ALSO not grounded. so running a spare RCA cable has no effect. What I have done is wired a RCA connecter to a copper cable and connected the other end to the Earth pin on a 3 prong plug. This is plugged in to a wall socket, thus grounding the sub.
It's not a solution the manufacturer will suggest, but it seems to work for me.
You didn't say is your sub active or passive.If its active first check signal cables from theater system,power line of the sub, it has to be the same phase as the system.If its passive take a voltmeter disconnect the sub from the system and measure for DC voltage on the SUB output on the system when its OFF.If DC voltage is present your amp is damaged.It can also be that the preamp circuit for the sub doesn't mute the input when unit is on stand by and you hear frequency of your power supply (50-60Hz) on the sub