clip and is therefore the highest power level one can obtain without completely obliterating the program.

Last, the "normal operating power", as defined by the safety standard IEC 65/ANSI/UL 6500 and used by a majority of safety agencies. The normal operating power is measured using pink noise, with an average output power equal to 1/8 of full power. The one eighth of the total power is as loud as you can play music while making some attempt to avoid obvious clipping. It also corresponds to headroom of 9dB, which is very low for normal audio program.

TA 1400

MAX OUTPUT POWER

MAINS INPUT POWER

 

 

 

Power

1/3 Power

1/8 Power

Idle

 

 

[W]

note 1

note 2

 

8 ohms

2x

425

690

430

 

90

4 ohms

2x

700

1150

760

 

90

2 ohms

2x

1050

1925

1225

 

90

note 1 Average power with music as program source. The amplifier driven to clip level. note 2 Normal music power with 9dB headroom, IEC standard power rating.

Table 1.

6.7.1 Calculation

The current draw can be calculated by dividing the mains input power by the mains voltage. We recommend you to design the power distribution for at least the current at 1/8 power, and 1/3 power for heavy-duty demands like discos etc.

The heat power can be calculated as in the following example:

We consider headroom of at least 9dB and a 4 ohms load on an amplifier producing 700 watts per channel. The 1/8 power per channel is accordingly; 700 / 8 = 87 watts, and total output; 2 x 87 = 175 watts.

The power consumption according to the chart above is then 1200 watts.

The heat power produced is the difference between the power consumption and output power; 1200 - 175 = 1025 watts per amplifier.

7 CONNECTIONS

7.1 Input connections

7.1.1 Balanced inputs

XLR Input connectors are active balanced and wired according to the IEC 268, that is pin 2 hot, and wired in the following way:

PIN 1

GROUND/SHIELD

PIN 2

HOT (+)

PIN 3

COLD (-)

Figure 4. XLR input connector

Figure 5. XLR balanced

 

 

 

 

Tannoy Limited

10

TA 1400 User Manual

11-06-02

 

Page 10 Page 12
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TOA Electronics TA 1400 user manual Connections, Calculation, Input connections, Balanced inputs
Page 10 Page 12

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.
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