its a two channel, realistically expect it to run at around 230x2@4OHMS, its a rockford and they always underrate their amplifiers by minimum 15-20%...
comparison to $350 jaycar amplifier:
2x150@4OHMS
1x484@2OHMS
this is a rockford, the potential is there as stated by the birth sheet, nearly 900RMS@4ohms! thats 4ohms! and its not a dedicated monoblock sub amplifier. its rockford, its a quality amplifier. check out the RRP of the amp then draw your own conclusions.
IMO the price reflects the quality, so deal with it.