Any advice would be greatly appreciated. Which is more power or better? 2 35W channels driving 2 voice coils of a sub vs. 2 35W channels bridged to a single channel driving a single voice coil?
I have a situation where I am obligated to use 1 or 2 channels of a 12 channel x 35W amp to power an 8" ceiling sub that has dual voice coils. It's for background music, not movies.
Here are 3 options:
1. I can send 2 35W (8ohm) channels to each 8 ohm voice coil of the sub.
2. I can bridge the 2 35W channels to go to one of the voice coils.
3. I can set the amp to a 4 ohm load and send one of the channels: 35W (@ 55W at 4ohm) to the 2 paralleled voice coils.
Per channel, the amp allows switching between 4 or 8 ohm loads (8 ohms only bridged). Per channel, the amp allows switching input signal R or L or R+L (summed)
I have not tried any other config yet besides option 1. I did test a car sub's output by removing the second set of voice coil leads and I could not hear a drop. But I would assume that 2 voice coils would double the drive of a speaker, compared to a bridged config that would increase energy by only a third.