The Planet Audio EC20B three-way electronic crossover is a high-fidelity signal processor that allows you to customize the low level output of your input source (a car radio), so that the signal can be applied to an amplifier or amplifiers as a part of a two-way or three-way mobile audio system. It is intended for use in a car audio system which includes amplifiers in the signal path after the crossover, and provides front, rear, and subwoofer low level outputs via RCA connectors.
The EC20B is optimized for head units which provide outputs for Front (UR), Rear (UR), and Subwoofer (UR) channels. But what if your head unit only provides a single pair of stereo (UR) outputs? By setting the Parallel Input selector control to Out, the signal applied to the Front (UR) EC20B inputs will also be routed to the Rear channel. This eliminates the need for external Y-adaptors, which can sometimes add noise to the system. Now you can provide custom processing to the Rear channel independent of the settings you apply to the front.
By providing a way for you to select a frequency from either a Mids/Highs range or a Tweeter range for the Front channel crossover, we give you the choice to use this crossover in different applications. For example, you can use the Front channel as a stereo Tweeter channel by setting the Crossover Frequency Multiplier to the higher 800Hz-8kHz range, and Rear channel can serve as the Mids/Highs channel, for a three-way stereo system. Or you could create a four-channel system, with Front and Rear channels reproducing the Mids/Highs.
Many head units also lack a subwoofer channel output. In this situation, by setting the Sub Input control to Mix, the EC20B sub channel controls will be delivered a mix of L Front/Rear to the Subwoofer Left Channel and a mix of the R Front Rear to the Subwoofer Right channel. This eliminates the need for external Y adaptors and mixer devices.