I would like to use the AKSA as the bass amplifier in a tri-amped, active crossover. What are my options?
There are a number of important points to make about active crossovers. This is not a straightforward area, unfortunately, and you must consider your options carefully since the extra cost and complexity is appreciable. To create a low pass filter at line level (at the front end of an amplifier) you need additional circuitry which cuts the input level to the amplifier sharply as the frequencies pass the specified crossover point. Let s choose a corner frequency of 100Hz; a simple, 1st order crossover made up of a single resistor and capacitor would, however, only give you flat response at 100Hz (no attenuation), 6dB down at 200Hz (very little attenuation, you could hear it as about three quarters of the original loudness), and 12dB down at 400Hz. It would be 18dB down at 800Hz, and 24dB down at 1600Hz (and still just about audible). Depending on your drivers, this is generally not adequate for a domestic hifi since higher frequencies are not reproduced well by conventional woofers. Too
