What do you get from the D1 PRO?

1、Volume Control:

     There are two ways to adjust the volume: a potentiometer and an electronic volume  control via the remote control.

  The electronic volume chip uses TI's PGA2311U.

2、Tone Control

    Tone bypassed, or TREBLE/MID/BASS enabled, adjustable within a ±12dB range,                   adjustable via remote control.

3、HPF Control

     HPF bypassed or enabled, with selectable -3dB cutoff frequencies of 60Hz, 80Hz,        100Hz,  or 120Hz.

4、LPF for Subwoofer

SW port for connecting to an active subwoofer, LPF output with selectable -3dB cutoff frequencies of 40Hz, 60Hz, 80Hz, or 100Hz.

In a nutshell: The D1 PRO uses the TI TAP3255 amplifier chip, designed for streamlined 2.1-channel sound, and offers a color-variable digital display. Volume, filter, tone, color, and brightness are easily and conveniently switched via the remote control.

.Circuit architecture diagram

.High-pass filter effect diagram