Logitech Z906 Service Manual Hot

: The Z906 subwoofer lacks a robust external heatsink. Ensure the back of the sub is clear of walls or cabinets. Some users add a small PC case fan to the backplate to maintain airflow during heavy use.

The manual confirms that the Z906 uses floating ground topology. Never connect the negative speaker terminals together or to a chassis ground. You will blow the amplifier ICs instantly.