For radios with four-channel bridge amplifier, which is equipped with almost all modern models, these options enable the AU can be combined in different ways. For example, using both "low-frequency mono and normal (not pavement) connection diagram (Fig. 19), the resulting diagram can be used to connect a subwoofer and tweeters or rear speakers (with limited bandwidth), and the remaining channels will be used for the front speakers. Since this embodiment uses an inverting and non-inverting outputs of USC, pay attention to the polarity of the heads. In short, the options are many - would be a fantasy.
Fig. 19
Author: A. Chechetov; Publication: www.bluesmobile.com/shikhman, www.cxem.net