A mono amplifier makes a great choice for powering subwoofers. They're specifically designed for low-frequency reproduction, with built-in bass boost and low-pass filters. Class D mono amps are often a good choice — they draw less current, produce less heat, and are more efficient than conventional amp designs. You can use a 2-channel amp for powering two subs, or bridge the amp to single channel operation for a single woofer. Likewise, a 4-channel amp can be bridged to 2-channel mode to power a pair of subs. How much power you need depends on the subwoofer(s) you'll be using, but figure on at least 150-200 watts per sub for 10" or 12" subwoofers.
Power Venom S Series
V800.4S Rp 2.420.000 Rp 2.330.000
V1000.4S Rp 3.750.000 Rp 3.500.000
V500.2S Rp 2.100.000 Rp 1.990.000
V2600S Rp 5.200.000 Rp 5.120.000
V2000S Rp 3.750.000 Rp 3.690.000
VD6000 Rp 8.880.000 Rp 8.760.000