MPN: KRYPTON F2. Item model number: KRYPTON F2. Style: 4 Channel 600w RMS. Manufacturer: ROCKVILLE. 2 Ohm: 150 Watts x 4 Channels <1% THD+N. 4 Ohm: 100 Watts x 4 Channels <1% THD+N. Fully Adjustable 12dB / Octave Crossover with Differential Circuitry.
eBay