Introduction, Package Contents

Introduction

Bogen's M-Class amplifiers deliver on what professional sound installers need most: Flexibility, Power, and Reliability.

Flexibility

The M-Class allows for the installation of up to 2 input modules, accepting inputs from microphones, telephone systems, stereo sources, mono sources, or daisy-chaining of amplifiers. Each M-Class model comes standard with a single, professional-quality, stereo, high-impedance balanced input module (BAL1S).

The M-Class has three operating modes to meet different installation needs - Stereo, Dual Mono, or 70V Mono. Front panel controls allow independent operation of each power amplifier channel in stereo mode. In either 70V Mono or Dual Mono modes, the inputs form a 2:1 mixer with the front panel controls setting the signal levels from each input. Prioritized input modules and 2:1 mixer operation allow the M-Class to supply the front- end signal processing required in paging systems and the power to cover any size installation.

Power

With three different models (M600, M450, and M300), the M-Class provides 2-channel operation at 600W, 450W, and 300W per channel into 4-ohm loads. Single channel, 70V Mono operation capacities are 1200W, 900W, and 600W. Along with being powerful, these amplifiers are also compact - using up only 2 rack spaces (3-1/2") in a standard 19" rack.

Reliability

Driven by a conservatively-rated toroidal power transformer, these amplifiers are built for solid performance with low distortion and a high slew rate. Output module circuitry is located away from input module circuitry, minimizing noise and ground loops.The amplifiers require little maintenance and cleaning as internal electron- ic components are located outside of the forced air-stream flow. Front-mounted fan filters provide easy removal and cleaning.

M-Class amplifers have a variety of electronic protection circuits including overcurrent, DC voltage, and ther- mal circuits. A special Clip/Limiting circuit continuously monitors the amount of distortion in the output signal and reduces input levels as the amplifier approaches clipping. Back-Slope™, Bogen’s unique voltage stabilization circuitry, regulates the AC energy supplied to the power toroid. This improves both system performance and reliability despite varying AC supply conditions.

An energy-conserving sleep mode (defeatable) with instant-on return signal operation reduces wasted heat production in paging systems with intermittent use. In addition, large output heatsinks and dual independently- controlled, high-output, variable speed fans provide superior cooling and quiet operation while reducing dust accumulation.

Bogen's M-Class amplifiers are enclosed in a heavy-gauge steel chassis, which prevents mechanical damage to the unit's internal components even if the unit is subjected to rough handling and excessive portable installa- tions.The control knobs are located in a recessed section of the cast aluminum front panel to reduce the like- lihood of mishandling and damage.The angled design of the amplifier's front panel allows easy finger access to the front knob cover when the amplifiers are stacked tightly in a rack.

Package Contents

* M-Class Amplifier		* 2 Rack Ears
* 2	Filters and Grilles	* Instruction Manual
* Control Knob Cover		* BAL1S Input Module (pre-installed)
* 4	Rubber Feet & Screws

M300 specifications

The Bogen M300 is a versatile and powerful public address system designed for a wide range of applications, including schools, churches, auditoriums, and outdoor events. Its robust design and advanced features make it an ideal choice for anyone looking to enhance their audio experience.

One of the standout features of the Bogen M300 is its high-quality audio performance. The system is equipped with a 300-watt amplifier that delivers clear and powerful sound, ensuring that every announcement or musical performance is heard loud and clear. The built-in EQ settings allow users to fine-tune the audio output for different environments, providing flexibility in various settings.

The M300 is also designed for ease of use. Its intuitive interface includes straightforward controls, allowing users to quickly adjust volume levels, tone quality, and other settings without any hassle. Additionally, the system includes a variety of input options, such as XLR and 1/4-inch inputs, which enable compatibility with a wide range of microphones and audio sources.

Another notable characteristic of the Bogen M300 is its portability. Weighing only a fraction of what traditional PA systems do, the M300 can be easily transported from one location to another. Its rugged construction ensures durability, making it suitable for use in both indoor and outdoor settings.

The M300 is also equipped with advanced technologies, including built-in Bluetooth connectivity, allowing users to stream audio wirelessly from their devices. This feature makes it easy to play background music or audio files without the need for cumbersome cables.

Safety and reliability are also a priority for Bogen, and the M300 comes with integrated protection features that prevent overheating and short-circuiting. This ensures that the system operates smoothly, even during extended use.

Overall, the Bogen M300 stands out as a powerful and flexible public address system. With its high-quality audio performance, user-friendly design, and portable nature, it’s an excellent choice for anyone in need of a reliable audio solution. Whether you're presenting in a classroom, performing in a park, or delivering a sermon in a church, the Bogen M300 is engineered to meet your audio needs effectively.