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audio systems to acoustically match the head unit to the capabilities of the speakers. Originally limited to luxury vehicles with expensive, optional audio packages, the use of pre-set EQ is now found in most cars and trucks sold during the last decade and even base model, budget tier vehicles with basic audio systems.

A pre-set EQ curve is designed to maximize the perceived quality of sound while also minimizing the power handling and frequency response limitations of the original system by modifying the levels of bass, midrange and treble that is output through the OE speakers. Although the pre-set EQ compromises the accuracy of the original signal, for the consumer that is satisfied with their OE audio system, this compromise is a beneficial feature that makes the system more reliable and better sounding when compared to a factory installed system without it.

Traditionally, if you weren’t satisfied and wanted better sound, the first step was to upgrade and replace the factory installed head unit and original speakers. However, many newer vehicles integrate the climate controls and rear visibility systems into the original head unit, making its removal difficult or impossible. For these vehicles, upgrading the original speakers or adding a high performance amplifier or subwoofer system is still possible, but unless the pre-set EQ is corrected by reversing its affects, the overall performance of the system will be compromised or limited.

The DEQ-S1000A is an innovative approach to overcome the effects of an OE audio system’s pre-set EQ. Featuring both high level and low level inputs plus DSP-based OE pre-set EQ cancellation, the DEQ-S1000A is unique in how it leverages Pioneer’s software expertise and smartphone integration experience to harness the processing power and touchscreen user interface of a connected iPhone or Android2 smartphone. This advanced design improves performance and ease of use while minimizing the need for ultra high-cost components. Pioneer engineers have also implemented advanced post-correction sound controls like a 31-band touch EQ, digital time alignment, 3-way digital network with subwoofer control, hi-volt preamp outputs, an internal MOSFET 50W x4 amplifier and more to provide expanded system flexibility and control.

Using the Sound Tune App to customize your setup

The Pioneer DEQ-S1000A connects to your smartphone and Pioneer’s Sound Tune app to perform the advanced calculations needed to digitally analyze and correct the factory pre-set equalization and provide a touchscreen interface for simple, intuitive controls. Download the Pioneer Sound Tune app free of charge.

(Pioneer Sound Tune app required for product operation.)