Which sub for this amp?


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I am looking at a rockford fosgate power 120001bd

750 watts RMS x 1 at 4 ohms (CEA-2006 Compliant)
» 1,500 watts RMS x 1 at 2 ohms
» 2,000 watts RMS x 1 at 1 ohm
» 1-ohm stable
» frequency response 20-300 Hz
» Class bd technology
» requires 1/0-gauge power and ground leads -- wiring and hardware not included with amplifier
» variable low-pass filter (32-250 Hz, 24 dB/octave)
» Para-Punch bass EQ (0-18 dB with variable center frequency between 35-70 Hz) with wired remote control
» variable phase control (0°-180°)
» MOSFET power supplies and outputs
» MEHSA mounting technology increases the heat transfer from the MOSFET output devices to the heat sink, for higher power output, lower operating temperatures, and greater reliability.
» TOPAZ noise-killing differential inputs eliminate 80% of ground loop noise between the head unit and the amp.
» TRANS-ana circuitry keeps preamp signal clean
» NOMAD advanced protection circuitry monitors temperature, voltage, current and impedence, and provides "intelligent" shut-down protection without limiting system performance.
» fan cooled
» preamp outputs for easy connection to a second amplifier
» fuse rating: 250 amps
» dimensions: 23"W x 2-11/16"H x 12-3/4"D
» warranty: 2 years

should i get a 2 ohm sub or a 4 ohm sub?
2 ohms would give me more power.
so is that a good idea?
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