I'm trying to get amplification to drive a single passive 12" PA system, rated at 200 RMS, and an additional passive 12" subwoofer, rated at ~300 RMS. The amps will run off a buck converter connected to a 12v deep cycle battery. I'm looking for cheap, powerful, and energy efficient.
Right now I'm looking at buying two TPA3255-based amps:
AIYIMA TPA3255 Subwoofer Power Speaker Amplifier 300W Mono Hifi Home Audio Amplifier NE5532 OP AMP Bass Treble Adjust|Amplifier| - AliExpress ($45 each)
and run one in PBTL mode and one in SUB mode. It seems that the input power is limited to 35v, so I think this will give me ~120w RMS at 8ohm, for ~90$.
I'm wondering if there might be a cheaper, more powerful, or more energetically efficient solution. One idea I've been playing with is using a single TPA3255 with two output channels (2x300w), feeding in a mono main PA signal on the left input and the pre-filtered mono subwoofer signal as the right input. This would let me get away with using a single amp, for ~$50, also I'm imagining ~120-150 RMS at 8ohm, and possibly half the energy use. However, I'm not sure if this is feasible, in particular if feeding in main PA/subwoofer signals as left/right differential inputs is a good idea.
Any advice or thoughts would be appreciated.
Right now I'm looking at buying two TPA3255-based amps:
AIYIMA TPA3255 Subwoofer Power Speaker Amplifier 300W Mono Hifi Home Audio Amplifier NE5532 OP AMP Bass Treble Adjust|Amplifier| - AliExpress ($45 each)
and run one in PBTL mode and one in SUB mode. It seems that the input power is limited to 35v, so I think this will give me ~120w RMS at 8ohm, for ~90$.
I'm wondering if there might be a cheaper, more powerful, or more energetically efficient solution. One idea I've been playing with is using a single TPA3255 with two output channels (2x300w), feeding in a mono main PA signal on the left input and the pre-filtered mono subwoofer signal as the right input. This would let me get away with using a single amp, for ~$50, also I'm imagining ~120-150 RMS at 8ohm, and possibly half the energy use. However, I'm not sure if this is feasible, in particular if feeding in main PA/subwoofer signals as left/right differential inputs is a good idea.
Any advice or thoughts would be appreciated.