Pioneer DEQ-P9 User Manual

The serial number of this device is located on the bottom of this product. For your own
security and convenience, be sure to record this number on the enclosed warranty card.

A vehicle, unlike the home audio, imposes several constraints upon the quality of repro-
duced sound, and have the following effects:
• Reflected sounds have strong effects on direct sounds because of the confined space and

complex shape within a vehicle. This disturbs frequency characteristics and significantly
reduces sound quality.

• The orientation of the sound image becomes unnatural, because speakers may not be

installed symmetrically to left and right of the listener, or because speakers are installed
in both the front and rear.

This system is equipped with a wide variety of functions that use DSP to create the ideal
sound quality and sound image in a vehicle and overcome these constraints on reverbera-
tion.