Yamaha TX4n, TX5n Adjusting the input/output levels

TX6n/5n/4n Reference Manual

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 “Gain /

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.

ADC

Slot

Input Router

Gain