There's conflicting info, then. From Buttkicker's product release
statement:
Product highlights include:
· 4 ohm impedance
· 5 – 200 Hz frequency response with
more power in the 5 – 25 Hz range
· ButtKicker Power Amplifier can power up to four (4) LFE units
· Ideal for home theater and permanent installations such as theaters, attractions and
nightclubs
· Previously named “ButtKicker 2”
ButtKicker Concert
Designed specifically for musician monitoring, stage and studio use, the ButtKicker®
Concert has more power in the
40 – 80 Hz range than the ButtKicker® LFE.
Product highlights include:
· 2 ohm impedance
· 5 – 200 Hz frequency response with more power in the 40 – 80 Hz range
· Two channel amplifiers can power two (2) ButtKicker Concert units independently
· Ideal for musician monitoring, stage and studio use