This product is Ex-Display, there may be a few light marks but nothing that effects the full working order.
The BT913 employs a special Parallel and Series switching circuit to protect the amplifier. Regardless of which loudspeakers are switched on, the amplifier load will not fall to less than half that of the loudspeakers in use. i.e. if using 8 ohm louspeakers, the minimum load will be 4 ohms. Nearly all amplifiers will accept a load of 4 ohms.
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