Adds 70V/100V transformers for operating SB210 on distributed spkr lines. Taps at 125W+125W, 62W+62W, 31W+31W (and 15W+15W for 70V), for stereo or mono. Also adds Passive Crossover Network with High-Passed Output for Satellite Speakers and Internal Low-Pass. Switch Allows for Either 4 O or 8 O Satellite Loads.