General Description

The CP 52S is a versatile commercial preamplifier designed for use in restaurants, bars, health clubs and offices. The CP 52S 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:

  1. Page
  2. Program Priority
  3. A 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 SCP1S is an optional EQ-slider-only security cover.
  • Any front panel control knobs may be removed and replaced with provided hole plugs.

See the CP 64S if you need 2 page inputs and 2 zones.

See the DA 26S if you need up to 6 zones.

Gated Paging Circuit Features
  • Mic/Line Selection with Gain Trim
  • Phantom Power Switch
  • High and Low Cut Filter Switch
  • Adjustable Detector Threshold with Active LED
  • Paging Level Control
  • Switchable Page Level Tracks Zone Level
  • Page Input Servo-Locked Limiter with adjustable Threshold

Zone Output Features
  • Level Control
  • 1 of 4 Program Select
  • Ducker On/Off with Depth Control
  • Output Servo-Locked Limiter with adjustable Threshold
  • 7-Band Equalizer (±12 dB)
  • Wired Zone Remote Port for Level and Program Select

Special Features
  • Page Initiated Program Ducking
  • Gated Stereo Program Priority Input
  • Page/Program/Zone Expansion with Level Control
  • SCP1S Optional EQ Security Cover
  • Universal Internal Power Supply (100-230 VAC)

Rear Panel

Click on the images for a close-up. Right-click to zoom and pan.

Application Examples

system block diagram

ZR 1 Remote Control AccessoryZR 1

The optional ZR 1 wired Remote Control allows Zone Level and Zone Program selection of the CP 52S from within the Zone area. Remote control is initiated by engaging the Remote switch (located on the CP 52S front panel). The ZR 1 may be installed in a standard electrical box and finished with a Decora plate.

The ZR 1 connects to the CP 52S through a 5-pin Euroblock connector. The remote uses 5 wires with 2 bits for Zone Program selection, a common shield/ground and two wires for ratiometric DC control of Zone Level. Selector logic is active low Gray Code with pull-up provided in the CP 52S. Control may be a simple switch closure to ground or 5 volt TTL.

SCP1S Equalizer-Only Security Cover AccessorySCP 1 Security Cover

Just the equalizer section may be protected from the fingers of young audiophiles. Includes hole plugs to individually secure any of the rotary controls on the CP 52S also.

Commercial Processors Comparison

  CP 52S CP 64S DA 26S

Levels of Priority

3

4

1

Mic / Line Inputs

1

2

1

Number of Zones

1 Stereo

1 Stereo + 1 Mono

6

Page Limiter

Yes

No

AGC

Page High / Low Filter

Yes

No

Yes

Expand Outputs

1

2

6

Expand Levels

Yes

No

Yes

Another alternative is the RPM series of Drag Net products. Their paging functions include a Priority Auto Mixer/Ducker, Ambient Noise Compensator, Automatic Gain Control, Equalization, Feedback Suppression and additional signal processing in up to 8 in / 8 out configurations (depending on the RPM unit).

Further Information

Product Literature