Front Panel Menu

The front panel interface consists of a vacuum fluorescent display (VFD) and a rotary encoder with a push-button function. Press the encoder to enter a submenu, turn it to navigate between items or adjust a value, and press again to select or confirm. The VFD provides clear visibility in dark rack environments, which is one advantage over LCD alternatives.

Menu Tree

Menu Item	Options	Default
CROSSOVER	40 Hz - 250 Hz (continuous), LFE	LFE
SPEAKER EQ	FLAT, plus model-specific presets	FLAT
PHASE	0, 45, 90, 135, 180, 225, 270, 315 degrees	0
SOUND MODE	BYPASS, MUSIC, MOVIE	BYPASS
NIGHT MODE	ON, OFF	OFF
POWER CONTROL	FRONT PANEL, 12V TRIGGER, AUDIO SENSE	FRONT PANEL
IR DEVICE ID	1, 2, 3, 4	1
LOCK CONTROLS	ON, OFF	OFF
FACTORY RESET	Displays firmware version, then confirms reset	—

Menu Details

CROSSOVER sets the low-pass filter frequency. The LFE setting bypasses the internal crossover entirely, which is the correct choice when the upstream processor (AVR, DSP, or Control4 system) is handling bass management. When set to a frequency between 40 and 250 Hz, the D2-81431’s DSP applies a low-pass filter at that point.

SPEAKER EQ applies model-specific equalization curves. The FLAT setting passes audio without EQ correction. The 2024 Rev B manual expanded this from 4 presets to 16, adding Episode subwoofer models released after the original firmware. These presets are DSP coefficient sets stored in the Atmel EEPROM.

PHASE adjusts the output phase in 45-degree increments across a full 360-degree range. This is implemented in the D2-81431’s DSP rather than as a simple polarity inversion, which allows fine alignment with the main speakers at the crossover frequency.

SOUND MODE applies bass boost curves. MUSIC adds +1.5 dB at 50 Hz. MOVIE adds +3 dB at 30 Hz. BYPASS leaves the response flat.

NIGHT MODE limits output power to 250W and applies a -3 dB reduction, reducing maximum SPL for late-night listening.

POWER CONTROL selects how the amplifier turns on. FRONT PANEL requires manual power-on. 12V TRIGGER activates on a 2.6V or higher signal at the trigger input. AUDIO SENSE automatically powers on when audio signal is detected and powers off after 15 minutes of silence.

LOCK CONTROLS disables the front panel encoder to prevent accidental changes. When locked, hold the encoder for 10 seconds to unlock.

FACTORY RESET first displays the current firmware version (V1.03 in the manual) before asking for confirmation. This is useful for checking firmware version without actually resetting. Do not confirm unless a full reset to factory defaults is intended.