TX6n/5n/4n Reference Manual
54
Adjusting the Input/Output Levels
■
Basic level adjustment
If we think of the TXn amplifier in a similar way as a conventional analog amplifier, there are two parameters that determine the
gain/level.
•
Gain / Input sensitivity:
The input level before A/D conversion is adjusted from the front panel MENU screen
➝
[General]
➝
[Sensitivity/Amp
Gain].
If the level is not modified within the internal DSP (SIGNAL PATH), the gain / input sensitivity can be thought of as
being exactly the same as on a conventional analog amplifier. The gain can be adjusted in a range of 19.8 to 43.8 dB in 0.1
dB increments. However, the input sensitivity range differs between models.
•
Attenuator:
The output level at the final stage after D/A conversion can be adjusted by turning encoders A/B in the HOME screen.
The range is 0.0 to -80.0 and -
∞
dB, adjustable in 0.5 dB increments.
Unlike a conventional analog amplifier, the level can also be adjusted using the 4x4 Matrix Mixer or Speaker Processor of the
internal DSP (SIGNAL PATH screen). These can be used as appropriate for different purposes. For example, the Speaker Pro-
cessor can be used to adjust the level for each speaker unit.
■
Level adjustments between TX6n/TX5n/TX4n units
In a system where different TX6n/TX5n/TX4n models coexist, set the same gain on each unit if you want to obtain the same
output level (V, dBu) for a given input level. These settings are convenient when you need to manage the gain in a multi-way
speaker system. In this case, the maximum output will differ depending on the model, meaning that as you raise the input level,
the power amp section of the TX5n and TX4n will clip earlier than the TX6n.
Conversely, if you want to obtain the maximum output power (W) from the amplifiers for a given maximum input level, set the
input sensitivity to match the maximum input level. In this case, the output level for a given input level will differ depending on
the model, but each amplifier’s maximum output will be obtained for the same input level (the power amp section will begin
clipping when the maximum input occurs).
■
Level adjustments between analog and digital
To match the digital signal level to the analog signal level
without changing the analog signal level, adjust the gain of the
slot input.
If you want the level to be consistent between analog and dig-
ital signals from an audio source (such as a digital mixer)
equipped with both analog and digital outputs, refer to
Input Sensitivity conversion table” (page 53)
. Set the gain so
that even when using the TX5n or TX4n, the input sensitivity
of the TX6n and the maximum analog output level of the
audio source are equivalent.For example, the Yamaha PM5D
features a maximum output level of +24 dBu, so in this case
you would set the amplifier’s gain to 19.8 dB.The DM2000 or
the MY8-DA96 card have a maximum output level of +18
dBu, so in this case you would set amplifier’s gain to 25.8
dB.With these settings, the digital full-bit will be equivalent to
the audio sources’ analog maximum output level.
Adjusting the input/output levels
Redundancy
Gain/
Sens.
[Analog
Input A]
[Analog
Input B]
ADC
Matrix
Mixer
Pol.
Pol.
Pol.
Pol.
ADC
Slot
Input
Router
Gain
Summary of Contents for TX4n
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