The Kicker C154 Specs
Single Voice Coil
4 ohms
250 watts RMS
500 watts peak power

Its hard to find info on the amp but this is what ive found... not 100% sure its even right
SQ-540 Amplifier Specifications:
2 channel 2 ohm stable
Amplifier 250w x 2
Power Output (DC 14.4V):
RMS @ 2 Ohm, Stereo: 120W x 2 Ch.
RMS @ 4 Ohm, Stereo: 75W x 2 Ch.
RMS @ 2 Ohm, Mono: 250W x 1 Ch.
RMS @ 4 Ohm, Mono: 200W x 1 Ch.

Is that amp strong enough to power two kicker subwoofers or is that not a good match? If not what are some other good choices for this amp? Any info would be helpful thanks