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and "strength" because these amps are strong and powerful. "Gouriki" amps feature dual power supplies that deliver more consistent voltage so your amp doesn't break a sweat when you're driving your system hard. Unique circuitry analyzes the signal going to and coming back from your speakers to increase the amp's control over cone movement, for tighter, punchier sound. The X600F 4-channel amplifier delivers 100 watts RMS per channel to your front and rear speakers, perfect for high-quality component speakers. Or bridge the amp to 2-channel mode, and send up to 300 watts each to a pair of subs. The variable high- and low-pass filters tune your system for maximum efficiency and sound quality, while the bass boost adds extra low-end punch when you want it.