Some comments on testing these amps. Even though the results I got from bench testing these amplifiers do not read like the published specs in the Behringer manual, they will do their rated specifications if tested the way Behringer tests them. I found heat and the circuit breaker located in the amplifier to be the 2 items that caused the amplifiers to fail the tests and not meet the published specs. I almost opened up the 2500 and bypassed the circuit breaker just to see if it would go on or go up in smoke. If I had a room that was temperature controlled to about 70 degrees with heavy duty air handling capabilities (and a duct pointed right at the intake of the amp), the amp would not have gotten so hot, so quick. Even with all that these amplifiers will not run with a sine wave at full power at 1 KHz for more than 5 minutes under any load, 2, 4, 8, or bridged! They are just not made to run like that. On the other hand, if you were to derate the power of the units, they could run all day at rated specs. SO you have to ask yourself....... Did the marketing dept. decide that this amp could do 2500 watts at 4 ohms bridged mono and the engineers said "Not really", but marketing did anyway? I don't know. Considering the money to be spent on them, for home use, they are fantastic.
I will be doing more tests next weekend with some amplifiers from Yuriv so stay tuned for more.
As far as testing a buttkicker... I do not have one or know anyone that does. Augerpro asked about maybe testing his so we shall see. If anyone in Florida would like theirs tested, PM me.