Operation

After all connections are made, turn power switch ON, illuminating the Power Indicator LED. The amplifier comes into operation approximately 5 seconds after the power is turned on.

Volume Adjustment

Obtain desired output level by adjusting the individual input and master volume controls. For normal music playing or announcement, adjust volume using their controls until the normal LED intermittently lights. Sound quality is deteriorated when the peak LED remains lit.

Tone Control Adjustment

Set the tone switch to the OFF position. This activates the bass and treble controls. The frequency response characteristics of each control are flat at center, boost in CW and attenuation in CCW positions. When tone

controls are unnecessary, set the tone switch to ON mode.

Installation

Never block ventilation holes.

 

The amplifier should never be placed in areas

 

exposed to direct sunlight.

susceptible to vibration.

with high humidity or dust levels.

with poor ventilation.

with high ambient temperatures.

adjacent to heat-generating equipment.

CAUTION : Do not remove the case or you may encounter an electric shock.

Note : When the temperature of heat sink exceeds 105 °C the protection circuit is activated and the output is disconnected from the circuit. Output is automatically restored when the temperature return to normal

operating parameter.

Servicing

Unpacking

Upon receipt of the amplifier shipment, please inspect for any damage incurred in transit. If damage is

found, please notify your local TOA representative and the transportation company immediately.

State date, nature of damage, whether any damage was noticed on the shipping container, prior to

unpacking.

Please give waybill number of shipping order.

Failure

Should amplifier fail, contact your nearest TOA authorized contractor or service center.

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TOA Electronics A-903MK2, A-906MK2, A-912MK2 Operation, Volume Adjustment, Tone Control Adjustment, Installation, Servicing

A-903MK2, A-906MK2, A-912MK2 specifications

TOA Electronics is renowned for its commitment to high-quality audio solutions, and the A-912MK2, A-906MK2, and A-903MK2 mixers exemplify this dedication through their innovative features and technologies. These mixers are ideal for various applications, including commercial spaces, educational institutions, and houses of worship.

The A-912MK2 is a powerful 120W amplifier that stands out due to its advanced signal processing capabilities. It features an 8-channel input, allowing for versatile connection options to accommodate various audio sources. The amplifier includes a built-in priority paging function that automatically lowers the music volume when a paging input is activated. This ensures that important announcements are heard clearly without compromise on background music levels. Additionally, the A-912MK2 incorporates a high-quality digital signal processor (DSP) that enhances audio quality and provides feedback suppression, ensuring clarity in vocal applications.

The A-906MK2, on the other hand, is a compact yet robust 60W mixer amplifier. One of its key features is the dual-zone output capability, making it perfect for complex audio environments where sound needs to be directed to multiple areas. This model offers multiple input options, including both microphone and line-level inputs, and features tone control for individualized sound shaping. The A-906MK2 is particularly appreciated for its ease of use, with intuitive controls that allow for quick adjustments on the fly.

Finally, the A-903MK2 rounds out the trio as a reliable 30W amplifier designed for smaller settings or intimate gatherings. It excels with its straightforward design, featuring a built-in MP3 player providing additional playback options directly from a USB stick or SD card. Like its counterparts, the A-903MK2 supports multiple input formats and includes essential features such as volume control, bass and treble adjustments, and phantom power for condenser microphones.

All three models embrace TOA’s philosophy of creating user-friendly products without sacrificing performance. They are crafted with durable materials for longevity and reliability in professional settings. Furthermore, these mixers are equipped with various safety features, including thermal protection and overload warning indicators, ensuring safe operation under varying conditions.

In summary, the A-912MK2, A-906MK2, and A-903MK2 by TOA Electronics are exceptional tools for delivering high-quality audio experiences across diverse environments. Their innovative features, reliability, and sound engineering make them excellent choices for professionals seeking performance without compromising on usability.