Pioneer VSX-21TXH User Guide

En

PQLS (Precision Quartz Lock System) is a digital audio 
signal transfer control technology using the KURO LINK 
function. It offers higher-quality audio playback by 
controlling audio signals from the receiver to a PQLS 
compatible player, etc. This enables removing jitter that 
has a negative effect on the quality of the sound and is 
generated upon transmission.

• VSX-23TXH only: On players compatible with PQLS 

Multi Surround, PQLS works for all sources. Set the 
player’s audio output to Linear PCM.

• On players compatible with PQLS 2 ch Audio, PQLS 

only works when playing CDs.

To use the PQLS function, set PQLS in the player’s Setup 
Navigator to AUTO.

Please refer to the operating instructions supplied with 
your player for more information.

This function is activated when KURO LINK is set to ON.

setting.
The setting is displayed on the front panel display.

• PQLS AUTO – PQLS is enabled. A precision quartz 

controller in this receiver eliminates distortion 
caused by timing errors (jitter), giving you the best 
possible digital-to-analog conversion when you use 
the HDMI interface. This is valid as an HDMI function 
for PQLS-compatible players.

• PQLS OFF – PQLS is disabled.

Once you have finished all connections and settings, you 
must:

The synchronized amp mode can be set from the KURO 
LINK-compatible TV’s remote control. See the 
explanation below for operations in the synchronized 
amp mode.

These functions are set from the TV’s menu screen. For 
more information, refer to the operating instructions of 
the KURO LINK-compatible TV.

When using the synchronized amp mode, the KURO 
LINK-compatible component connected to the receiver 
operates in sync as described below.

• The receiver’s volume can be set and the sound can 

be muted using the TV’s remote control.

• When  the  TV’s  power is set to standby, the receiver’s 

power is also set to standby. (Only when the input for 
a component connected to the receiver by HDMI 
connection is selected or when watching the TV.)

• The receiver’s input switches automatically when the 

KURO LINK-compatible component is played.

• The receiver’s input switches automatically when the 

TV’s channel is switched.

• The  synchronized amp mode remains in effect even if 

the receiver’s input is switched to a component other 
than one connected by HDMI.

The operations below can also be used on Pioneer KURO 
LINK-compatible flat panel TVs.

• When  the  receiver’s volume is adjusted or the sound 

is muted, the volume status is displayed on the flat 
panel TV’s screen.

• When the OSD language is switched on the flat panel 

TV, the receiver’s language setting also switches 
accordingly.

• When the synchronized amp mode is canceled, the 

receiver’s power turns off if you were viewing an 
HDMI input or a TV program on the TV.

• When in the synchronized amp mode, the 

synchronized amp mode is canceled when the 
receiver’s power is turned off. To turn the 
synchronized amp mode back on, select the 
synchronized amp mode using the TV’s remote 
control.

• When in the synchronized amp mode, the 

synchronized amp mode is canceled if an operation 
that produces sound from the TV is performed from 
the TV’s menu screen, if the receiver’s HDMI output 
setting is changed, etc.

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