Pioneer VSX-21TXH User Guide

En

Select Normal (Surround back), Speaker B, Front Bi-
Amp or ZONE 2 for the Surr Back System setting 
according to connections to the surround back speaker 
terminals.

Make sure the microphone is connected, and if you’re 
using a subwoofer, make sure it is switched on and set to 
a comfortable volume level.

speaker configuration in the GUI screen.
A progress report is displayed on-screen while the 
receiver outputs test tones to determine the speakers 
present in your setup. Try to be as quiet as possible while 
it’s doing this.

4

If no operations are performed for 10 seconds while the 
speaker configuration check screen is being displayed, 
the Auto MCACC Setup will resume automatically. In this 
case, you don’t need to select ‘OK’ and press ENTER in 
step 6.

• With  error messages (such as Too much ambient 

noise! or Check microphone.) select RETRY after 
checking for ambient noise (see Problems when 
using the Auto MCACC Setup below) and verifying the 
mic connection. If there doesn’t seem to be a 
problem, you can simply select GO NEXT and 
continue.

 

The configuration shown on-screen should reflect the 
actual speakers you have.

• If you see an ERR message (or the speaker 

configuration displayed isn’t correct), there may be a 
problem with the speaker connection.
If selecting RETRY doesn’t work, turn off the power 
and check the speaker connections. If there doesn’t 
seem to be a problem, you can simply use 

/ to 

select the speaker and 

/ to change the setting 

and continue.

• If Reverse Phase is displayed, the speaker’s wiring 

(+ and –) may be inverted. Check the speaker 
connections.

5

– 

If the connections were wrong, turn off the power, 

disconnect the power cord, then reconnect properly. 
After this, perform the Full Auto MCACC procedure 
again.
– If the connections were right, select GO NEXT and 

continue.

A progress report is displayed on-screen while the 
receiver outputs more test tones to determine the 
optimum receiver settings for Channel Level, Speaker 
Distance, Standing Wave and Acoustic Cal EQ.

Again, try to be as quiet as possible while this is 
happening. It may take 3 to 10 minutes.

Be sure to disconnect the microphone from this receiver 
upon completion of the Auto MCACC Setup.

The settings made in the Auto MCACC Setup should give 
you excellent surround sound from your system, but it is 
also possible to adjust these settings manually using The 
Advanced MCACC menu on page 77 or The system and 
the other setup on page 90.

7

1 •  If  you  are planning on bi-amping your front speakers, or setting up a separate speaker system in another room, read through Surround back 

speaker setting on page 91 and make sure to connect your speakers as necessary before continuing to step 4.
• If you have THX-certified speakers, select Return, then select Auto MCACC for the THX speaker setting. See Automatic MCACC (Expert) on 
page 78 for more on this.

2 The six MCACC presets are used for storing surround sound settings for different listening positions. Simply choose an unused preset for now 

(you can rename it later in Data Management on page 88).

3 Note  that  correction curves are saved only when set to SYMMETRY. Select Return, then select Auto MCACC to save other correction curves 

(such as ALL CH ADJ and FRONT ALIGN). See Automatic MCACC (Expert) on page 78 for more on this.

4 Do not adjust the volume during the test tones. This may result in incorrect speaker settings.

5 If  the  speaker is not pointed to the microphone (listening position) or when using speakers that affect the phase (dipole speakers, reflective 

speakers, etc.), Reverse Phase may be displayed even if the speakers are properly connected.

6 You can also choose to view the settings from the MCACC Data Check screen. See Checking MCACC Data on page 86 for more on this.
7 •  Depending on the characteristics of your room, sometimes identical speakers with cone sizes of around 12 cm will end up with different size 

settings. You can correct the setting manually using the Manual speaker setup on page 90.
• The subwoofer distance setting may be farther than the actual distance from the listening position. This setting should be accurate (taking 
delay and room characteristics into account) and generally does not need to be changed.
• If Auto MCACC Setup measurement results are incorrect due to the interaction of the speakers and viewing environment, we recommend 
adjusting the settings manually.

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