Pioneer SC-1525-K User Manual

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• Surr – Select LARGE if your surround speakers 

reproduce bass frequencies effectively. Select 
SMALL to send bass frequencies to the other 
speakers or subwoofer. If you didn’t connect 
surround speakers choose NO (the sound of the 
surround channels is sent to the front speakers or a 
subwoofer).

• SB – Select the number of surround back speakers 

you have (one, two or none).

1

 Select LARGEx2 or 

LARGEx1 if your surround back speakers reproduce 
bass frequencies effectively. Select SMALLx2 or 
SMALLx1 to send bass frequencies to the other 
speakers or subwoofer. If you didn’t connect 
surround back speakers choose NO.

• SW – LFE signals and bass frequencies of channels 

set to SMALL are output from the subwoofer when 
YES is selected. Choose the PLUS setting if you want 
the subwoofer to output bass sound continuously or 
you want deeper bass (the bass frequencies that 
would normally come out the front and center 
speakers are also routed to the subwoofer).

2

 If you did 

not connect a subwoofer choose NO (the bass 
frequencies are output from other speakers).

Frequencies below this point will be sent to the 
subwoofer (or LARGE speakers).

You will return to the Manual SP Setup menu.

Using the channel level settings, you can adjust the 
overall balance of your speaker system, an important 
factor when setting up a home theater system.

menu. 
The test tones will start.

/.

Use 

/ to switch speakers.

Adjust the level of each speaker as the test tone is 
emitted.

4

You will return to the Manual SP Setup menu.

• You can change the channel levels by press 

RECEIVER, then press CH LEVEL, and then using 

/

 on the remote control.

For good sound depth and separation from your system, 
you need to specify the distance of your speakers from 
the listening position. The receiver can then add the 
proper delay needed for effective surround sound.

/.

You can adjust the distance of each speaker in 

1

/

2

 inch 

Increments.

You will return to the Manual SP Setup menu.

• For best surround sound, make sure the surround 

back speakers are the same distance from the 
listening position.

1 • If you selected ZONE 2 or Front Bi-Amp (in Speaker system setting on page 85) you can’t adjust the surround back settings.

• If the surround speakers are set to NO, the surround back speakers will automatically be set to NO.

2 If you have a subwoofer and like lots of bass, it may seem logical to select LARGE for your front speakers and PLUS for the subwoofer. This 

may not, however, yield the best bass results. Depending on the speaker placement of your room you may actually experience a decrease in 
the amount of bass due low frequency cancellations. In this case, try changing the position or direction of speakers. If you can’t get good 
results, listen to the bass response with it set to 

PLUS and YES or the front speakers set to LARGE and SMALL alternatively and let your ears 

judge which sounds best. If you’re having problems, the easiest option is to route all the bass sounds to the subwoofer by selecting SMALL 
for the front speakers.

3 • This setting decides the cutoff between bass sounds playing back from the speakers selected as LARGE, or the subwoofer, and bass sounds 

playing back from those selected as 

SMALL. It also decides where the cutoff will be for bass sounds in the LFE channel.

• With Full Auto MCACC Setup or Auto MCACC Setup (ALL or Speaker Setting), the setting here will not apply and the crossover frequency 
will be automatically set. Crossover frequency is a frequency aimed at achieving the optimal sound field taking into account the bass capacity 
of all connected speakers and human aural characteristics.
• If you’re using THX speakers, confirm that the crossover frequency is set to 80Hz.

4 If  you  are using a Sound Pressure Level (SPL) meter, take the readings from your main listening position and adjust the level of each speaker 

to 75 dB SPL (C-weighting/slow reading).

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