Connecting two identical speakers in parallel will halve the amp's perceived impedance, whereas connecting them in series will double it.

If both speakers are 8 ohms, you'll be okay as the 1050 is stable into a 4 ohm load (you may want to flip the switch). If they're 6 or 4 ohms you probably don't want to connect two of them.

Connecting in series would involve connecting the positive terminal of the 1050 to one speaker's positive, the negative of that speaker to the other speaker's positive, and the 2nd speaker's negative to the 1050's negative. I've not heard of speakers being connected in this way, though. Parallel is the usual way to do it.

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Matthew J. Hill
matt@idsi.net