MCP35A Control Panel

Rear View

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1.MIC 1 — Connections for an external mic (MIC 1). When the PROGRAM DISTRIBUTION button MIC 1 is pressed, the microphone connected here becomes active. As shipped from the factory, a link is installed between the HI and CONS MIC terminals. This makes the CONSOLE MIC act as MIC 1. When the link is removed, an external microphone can be connected to act as MIC 1 and the CONSOLE MIC will no longer be active when the MIC 1 button is pressed.

Note: The CONSOLE MIC is always used when the EMERGENCY PAGE button is pressed and when using the green INTERCOM PUSH-TO-TALK button (the user cannot change this). The external mic must be a low-impedance balanced mic (phantom power is also available for condenser mics).

2.MIC 2 — Connections for an external mic (MIC 2). When the PROGRAM DISTRIBUTION button MIC 2 is pressed, the microphone connected here becomes active. The external mic must be a low-impedance bal- anced mic (phantom power is also available for condenser mics).

3.VOICE CALL-IN— Allows retro fitting to older voice call-in systems with call-in switches connected in paral- lel. When a call-in switch is activated, an intercom channel is opened to the MCP35A control panel speaker so that the caller can announce verbally which room is calling. Systems that use this style of call-in will not see an annunciator light on the SBA225 room selector panel.

4.AUX — A high-impedance unbalanced input for auxiliary music sources. This input only becomes active when the PROGRAM DISTRIBUTION button AUX button is pressed.

5.TELCO PAGE — Shorting the TELCO PAGE terminal to GND activates a page from either MIC 2 or the TELCO INPUT (selected by an internal jumper).

6.TIME CLOCK — Shorting the TIME CLOCK terminal to GND produces a tone signal in all speakers.

7.LINE OUT — Provides an input signal that can be connected to the input of an external booster amp. Works in conjunction with the 25V BAL INPUT to allow replacement of the MCP-35A control panel’s built-in amplifier with a higher power amplifier.

8.SWITCHBANK CONNECTOR — SBA225 switchbank is connected to the MCP35A panel through this con- nector.

9.AUX POWER — An AC power outlet for auxiliary equipment.

10.12V Power Terminals — Chassis, ground, +12V DC supply, 750mA for powering up to 3 SCR25A modules.

11.25V BAL INPUT — The output of an external booster amp is connected at this 1/4” stereo phone jack. Works in conjunction with the LINE OUT connector see #7 above.

12.INPUT GAIN — Input level adjustments for all input sources.

13.TELCO PAGE — Alternate input for MIC 2 allows connection of Bogen model WMT1A for providing a 600- ohm balanced telephone input.

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Bogen PI35A, SI35A manual Rear View
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PI35A, SI35A specifications

The Bogen PI35A is a versatile and high-performance amplifier that is designed for commercial sound reinforcement applications. With its robust construction and advanced features, the PI35A is perfect for schools, conference rooms, and various public address environments.

One of the main features of the Bogen PI35A is its powerful 35-watt output capability. This ensures that audio can be delivered at a sufficient volume to cover medium-sized areas, making it an ideal choice for both speech and music playback. The amplifier is designed to provide clear and intelligible sound, which is essential for effective communication in any setting.

The PI35A also boasts a range of input options, including microphone, line-level, and auxiliary inputs. This flexibility allows users to connect various audio sources, such as microphones for live speaking engagements, mixing consoles, or even portable media players. The built-in tone controls, including bass and treble adjustments, enable users to tailor the audio output to suit their specific needs and preferences.

Technologically speaking, the Bogen PI35A incorporates advanced circuit designs to ensure reliability and longevity. The amplifier includes built-in protection circuitry that safeguards against overloads, short circuits, and overheating, allowing it to operate efficiently in demanding environments. Additionally, the amplifier operates quietly, ensuring that background noise does not interfere with important announcements or presentations.

One of the standout characteristics of the PI35A is its compact and lightweight design. Weighing in at just a few pounds, this amplifier can be easily mounted in various configurations, whether it be on a rack or wall-mounted, optimizing space while maintaining accessibility. The durable enclosure is engineered to withstand the rigors of installation in busy public areas.

In conclusion, the Bogen PI35A is a reliable and feature-rich amplifier that offers flexibility and excellent sound quality for various applications. Its combination of powerful output, multiple input options, advanced protection circuitry, and compact design makes it a solid choice for users seeking a high-performance sound reinforcement solution. Whether used for educational purposes, corporate events, or public announcements, the PI35A delivers a professional audio experience tailored to meet diverse needs.
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