\rHi Mike,
Rather than bridging it into mono, the better option is to run our OMSUB200 outdoor omni subwoofer in stereo with these speakers using our AMP200 amp. The AP670 patio speakers have a larger woofer and higher wattage so you would have more volume; however, the AP525s use higher quality polypropylene woofers. Both speaker pairs are comparable to the AP650s, which would be the best choice for a larger patio.
CL/MA 1804\r