If you have 2 subs 1400 watts peak and 700w RMS ea what amp do I need?

To power two subs rated at 700 watts RMS each, you'll need an amplifier that can deliver at least 1400 watts RMS total (700 watts RMS per sub). It's generally recommended to have an amp that provides a little more power than the combined RMS rating for headroom, so an amp rated around 1600 to 1800 watts RMS at the appropriate impedance (likely 2 ohms or 4 ohms, depending on how the subs are wired) would be ideal. Ensure the amp's output matches the impedance of your subs for optimal performance.