Roger, another point to keep in mind when connecting speakers in series is to be sure to connect the + (usually red) and - (usually black) terminals of the amp and speakers correctly. The proper way for a series connection of two speakers is as follows:
Amplifier (+) to Speaker 1 (+)
Speaker 1 (-) to Speaker 2 (+)
Speaker 2 (-) to Amplifier (-)
It doesn't matter which speaker is connected as speaker 1 and as speaker 2.
If you don't do that correctly it won't damage anything. But the sound will definitely suffer, assuming the two pairs of speakers are in the same room, or at least if both speakers can be heard at the same time.
Good luck. Regards,
-- Al
Amplifier (+) to Speaker 1 (+)
Speaker 1 (-) to Speaker 2 (+)
Speaker 2 (-) to Amplifier (-)
It doesn't matter which speaker is connected as speaker 1 and as speaker 2.
If you don't do that correctly it won't damage anything. But the sound will definitely suffer, assuming the two pairs of speakers are in the same room, or at least if both speakers can be heard at the same time.
Good luck. Regards,
-- Al