Output Level (Speaker Processor); Mute On/Off (Speaker Processor); Filter Types - Yamaha TX4n Reference Manual

Panel Operations
● Filter types
• PEQ
This is a conventional parametric equalizer.
• L.SHELF (Low Shelving)
Without attenuating the low frequencies, this filter applies a fixed amount of attenuation to the region above the cutoff
frequency. 6 and 12 (dB/Oct) specify the amount of attenuation per octave.
• H.SHELF (High Shelving)
Without attenuating the high frequencies, this filter applies a fixed amount of attenuation to the region below the cutoff
frequency. 6 and 12 (dB/Oct) specify the amount of attenuation per octave.
• HPF (High Pass Filter)
A gently (12 dB/Oct) diminishing curve will be applied to the lower frequencies.
• LPF (Low Pass Filter)
A gently (12 dB/Oct) diminishing curve will be applied to the higher frequencies.
• APF (All Pass Filter)
This filter modifies only the phase, passing the signal at all frequencies. This is used to correct the phase at the crossover
band. APF 1st will invert the phase 0°–180° and APF 2nd will invert the phase 0°–360°. For APF 2nd, you can adjust the
Q setting.
• Horn EQ
CD (Constant Directivity) horn speakers have the characteristic of rolling-off the level of the high-frequency range.
Horn EQ is an equalizer that compensates for this characteristic. For this reason, the Gain is limited to 0 dB or higher,
and the Frequency is limited to 500 Hz or higher.

■ Output Level (Speaker Processor)

This adjusts the output level in a range of -∞ – +10 dB.

■ Mute On/Off (Speaker Processor)

Turns output muting on/off.
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TX6n/5n/4n Reference Manual