.....Mtry, good answer in this application for sure....you been takin' smart pills?....I think WmAx said the Behringer A500 strapped has a pool 440 feet deep at a 4 ohm draw....did I say feet?....ahem, 440 4-ohm bullets....makes an unpowered sub show respect quick....but....in his application, he probably needs to have a 2 ohm stable amp and parallel his dual voice-coils for the bottom....as long as it stays clean....the name of the game is the best voice possible for the application, everything from top to bottom CLEAN, and no holes....I'm probably going to get a Placette linestage pre-amp.....
.....edit....that was a MONO 2 ohm stable amp with the dual voice-coils paralleled....the 4 ohm voice-coils paralleled gives the ohmage load in the bushes seen as 2....a strapped amp then would see 1....correct, space heater time....