Dear Bold,
Vertical biamping means that you have one stereo amp for each channel.
More importantly, NO, you do not need eq now any more than if you were not biamping. Since your amps are of the same brand, and in your case the same amp, they have the same gain for each amp. This is the ideal situation. You don't need eq any more than you need tone controls on your preamp. Unless you spend a huge amount of money (such as $10K on a used Cello Palatte eq) you will degrade your sound with the addition of more in your signal path.
Adding an active x-over would require bypassing the internal x-over within your speakers. The active x-over should be customized for you speakers with the correct slope and frequency. Done correctly, this is not cheap. I personally use the Krell KBX (lists for about $4K and can be found for approximately half on the used market). Krell will customize it for a mere $200. I think this is not practical in your situation.
To answer your final question: If you are worried about wasting power, you are probably in the wrong hobby (just kidding). The answer is yes, the amp does amplify the entire signal sent to it, but don't be concerned.
Vertical biamping means that you have one stereo amp for each channel.
More importantly, NO, you do not need eq now any more than if you were not biamping. Since your amps are of the same brand, and in your case the same amp, they have the same gain for each amp. This is the ideal situation. You don't need eq any more than you need tone controls on your preamp. Unless you spend a huge amount of money (such as $10K on a used Cello Palatte eq) you will degrade your sound with the addition of more in your signal path.
Adding an active x-over would require bypassing the internal x-over within your speakers. The active x-over should be customized for you speakers with the correct slope and frequency. Done correctly, this is not cheap. I personally use the Krell KBX (lists for about $4K and can be found for approximately half on the used market). Krell will customize it for a mere $200. I think this is not practical in your situation.
To answer your final question: If you are worried about wasting power, you are probably in the wrong hobby (just kidding). The answer is yes, the amp does amplify the entire signal sent to it, but don't be concerned.