planet audio ec20b 3way electronic crossover with remote subwoofer control

View larger How A Crossover Is Used 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. Parallel Input Selection 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.
Specifications Crossover center frequency ranges: Front (high pass) - 40-400Hz or 800Hz-8kHz; Rear (high pass) - 40-400Hz; Subwoofer (low pass) - 32-250Hz Crossover slope, front
and rear: selectable 6d8/octave or 18d8/octave Crossover slope, sub
channel: 18dB/octave
Bass Boost center frequency range: 25-250Hz
Bass Boost level adjustment: 0-+12dB
Signal-to-Noise Ratio: 110dB
THD: 0.
01% Channel separation: 80dB
Input impedance: 20kOhms
Output impedance: 100 Ohms
Output gain: 1:2 (+6dB)
Power supply: PWM type
Output voltage: 8V maximum1
Dimensions (W x D x H): 5-1/8" x 8-1/4" x 1-3/4" Front Channel Crossover Multiplier 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. Subwoofer Input Mix Option 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. Input, Output, Remote, and Power ConnectionsView larger Input, Output, Remote, And Power Connections Power LED Front And Rear L/R Inputs: Connect the outputs of your head units to these connections and be sure to place the Parallel Input selector in the In position.
Parallel Input Selector: If your audio source only has one pair of RCA inputs, placing this switch in the Out position allows the signal source connected to the front inputs to also be routed to the rear channel of the EC20B.
Sub Input Source Selector: If your audio source lacks a subwoofer chann