| The CP 52 is a versatile commercial preamplifier designed for use in restaurants, bars, health clubs and offices. The CP 52 serves one stereo Zone. One gated Paging Input and four stereo Program Inputs are provided. A Port is provided for expansion of Page, Program or Zone signals. Three levels of priority are supported: Page, Program Priority, and Non-Priority Program.
The Paging Input is summed after Zone Level, Zone EQ and Zone Limiter circuits. If the Link Page Level to Zone Level switch is on, the Page level tracks the Zone Level.
One of four stereo Program Inputs may be selected. Each line level Program Input features an independent Level control. A gated Program Priority Input is provided. When the Program Priority enable switch is on and signal is detected at the Priority Input (P), it overrides any non-priority Program selection. The detector features adjustable Threshold and Release-Time controls.
Several levels of security are available. The SC 1.7 is an optional security cover for the entire unit. The SCP 1 is an optional EQ-slider-only security cover. Any front panel control knobs may be removed and replaced with provided hole plugs.
The optional ZR 1 wired Remote Control allows Zone Level and Zone Program selection of the CP 52 from within the Zone area. Remote control is initiated by engaging the Remote switch (located on the CP 52 front panel). The ZR 1 may be installed in a standard electrical box and fiinished with a Decora plate.
The ZR 1 connects to the CP 52 through a 5-pin Euroblock connector. The remote uses 5 wires with 2 bits for Zone Program selection, a common shield/gnd and two wires for ratiometric DC control of Zone Level. Selector logic is active low Gray Code with pull-up provided in the CP 52. Control may be a simple switch closure to ground or 5 volt TTL.
See the CP 64 if you need 2 page inputs and 2 zones. | 
