I just finished the woodwork for a small sub. It will be driven by a AMP-1B. The sub holds two speakers, each with two 8 ohm voice-coils. So I have a number of options.
Option 1: Parallel the coils and let each (now 4 ohm) speaker be driven by one channel of the AMP1.
Option two: parallel the coils, put the two speakers in series and let the (now 8 ohm) speaker be driven by a bridged AMP1.
Each option has its pro's and cons. The amp will not be inside the box to avoid long signal wires. So in case of option 1 I will need 4 terminals and two sets of speaker wire. But in case of option two I need to bridge the amp and I don't know if that is at all advisable. Also I do not know if there is any difference in performance and efficiency when comparing two separate channels vs one bridged.
But I have to make a decision before closing the box...