Bi-amplification, or bi-amping, is when you use one amplifier for the low frequencies, and a second amplifier for the middle and high frequencies. This technique can allow listeners to take full advantage of the power of each amplifier and how it communicates with the speakers. The speaker must be equipped with two sets of binding posts; one for the mid-range/tweeter driver and one for the woofer. Bi-amping is not to be confused with bi-wiring, which uses a single amplifier and connects separately to the different speaker drivers. There is also tri-amping which can be used with three-way speaker designs to power each speaker driver (tweeter, mid-range, and woofer) individually.
If you need help bi-amping NAD amplifiers, please contact the NAD Support Team.