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D-75 factory mod for bridged operation

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Purchased a used D-75 a few years ago and have been using this amp in 2 channel (stereo) mode ever since. Would like to use it in bridged/mono mode now and then but noticed the manual says to have it modified by a factory service center for bridged operation. I have a (dual/mono) switch on the back of the amp.....does this mean it has already been modified for bridged operation ?

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Purchased a used D-75 a few years ago and have been using this amp in 2 channel (stereo) mode ever since. Would like to use it in bridged/mono mode now and then but noticed the manual says to have it modified by a factory service center for bridged operation. I have a (dual/mono) switch on the back of the amp.....does this mean it has already been modified for bridged operation ?

Good afternoon.

To switch this to bridge-mono, remove the bottom cover. There is a 3-pin header on the main board with a slide on jumper across two pins. Move the jumper to the other side of the header, the amp will be in bridge-mono. The board is screen printed mono on one side and dual on the other.

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