Installation, Mounting, Cooling | TOA Electronics TA 1400 guide

5.3.5 Bridge mono mode features

Bridged mono mode combines the power of both channels into one speaker. This results in twice the voltage swing, four times the peak power and just less than three times the full power of a single channel.

One way to understand the load and power from the amplifier’s perspective in bridged mode is that it is zero voltage at the center of the voice-coil winding. This is because the coil is driven with positive voltage at one pole and an equivalent negative voltage at the other pole. So, if an 8 ohms load is connected in bridged mode, one channel shares one 4 ohms part of the load, and the other channel shares the other 4 ohms part. The power into 4 ohms from an TA 1200 is 700W. So, the total bridged power into the 8 ohms load will be 2 x 700 = 1400W

6 INSTALLATION

6.1 Mounting

The amplifier is two rack units high (2U) and will mount in a standard EIA 19” rack. Amplifiers may be stacked directly on top of each other. There is no need for spacing between units. If it is the intention to fill a rack with amplifiers, we recommend racking is started from the bottom of the rack. It is also recommended that rear supports are used for amplifiers mounted in the middle of the rack, especially if used as part of a portable system.

6.2 Cooling

Your amplifier uses a forced air cooling system to maintain a low and even operating temperature. All fan cooled Tannoy amplifiers have front to rear airflow. There are several reasons for this, one being that there is usually cooler air outside the rack than inside, and therefore the amplifiers can run at higher continuous power levels without thermal problems. Never try to reverse the airflow, as the Intercooler® needs a pressure chamber between the fans and heat sink, and this only works in one direction of the airflow.

Should a heat sink get too hot, its sensing circuit will mute the hot channel. If the power supply overheats, another sensing circuit will mute all output channels, until it cools down to a safe operating temperature.

Make sure that there is an adequate air supply in front of the amplifier, and that the rear of the amplifier has sufficient space to allow the exhaust to escape. If the amplifier is rack-mounted, do not use covers or doors on the front or rear of the rack.

For installations with a central cooling system, usually found in fixed installations with a dedicated rack room, it may be necessary to calculate the maximum heat emission. Refer to Power consumption on page 9.


Tannoy Limited	8
TA 1400 User Manual	11-06-02

TA 1400 specifications

The TOA Electronics TA-1400 is a professional-grade amplifier designed for various applications, including public address systems, commercial installations, and professional sound reinforcement. Renowned for its reliability and superior performance, the TA-1400 has become a popular choice among audio engineers and providers of sound solutions.

One of the main features of the TA-1400 is its robust power output, delivering 140 watts into 4 ohms. This high power rating ensures that the amplifier can drive a wide range of speakers, making it suitable for both small venues and larger environments. Its versatility allows users to adjust the output to meet specific needs, whether in a classroom, auditorium, or outdoor event.

The TA-1400 integrates advanced technologies, making it easy to use and efficient. It features a built-in mixer with multiple microphone and line-level inputs. This ensures seamless integration of different audio sources, whether it be microphones for events or music playback from various devices. Additionally, the advanced circuitry employed in the TA-1400 minimizes distortion and enhances audio clarity, allowing for crisp and clear sound reproduction.

Moreover, TOA has incorporated several protective mechanisms in the TA-1400 to ensure longevity and reliability. The amplifier includes overload protection, short-circuit protection, and automatic thermal shutdown. These features safeguard the amplifier against damage from excessive heat or electrical faults, ensuring consistent performance over time.

The design of the TA-1400 emphasizes user-friendliness, with intuitive controls and indicators that provide real-time feedback on the status of the amplifier. Users can easily adjust levels, monitor input signals, and gauge overall performance without any hassle.

Another noteworthy characteristic of the TA-1400 is its lightweight and compact form factor. This makes it easy to transport and install in various settings, providing flexibility for different configurations. Additionally, the unit can be mounted in a standard 19-inch rack, accommodating professional setups.

In summary, the TOA Electronics TA-1400 amplifier stands out for its powerful output, versatile input options, built-in protection features, intuitive interface, and portability. These attributes make it a vital component in achieving high-quality sound in any audio installation, whether for live events, educational environments, or commercial spaces. Its reliability and performance make it a trusted choice for audio professionals looking to elevate their sound solutions.