Jarod, You can bridge the GT-50's four high-pass channels into two channels to drive the Pro80s. Add a GT-22 or GT-24 bridged mono to drive the single Pro485. This will optimize both impedance and power. I suspect that the Kicker will give you more than enough power bridged on the Pro485, but the two stereo channels running the 4-ohm Pro80s may be light on power. Check out the 4-ohm stereo rating on the Kicker before you buy. David Earmark Marine
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