Megalith-12 User Manual

Overview

The Megalith-12 has a digital media control unit with Bluetooth, USB, SD card, and Bluetooth TWS (True Wireless Stereo) input, a built-in microphone mixer, a 5-band graphic equalizer, and a set of sound presets. All settings are controlled from the front-panel display using the rotary encoder knob and the five transport buttons.

This manual covers:

• Front panel layout
• Powering on and the Home screen
• Selecting an input source
• Playback controls
• Navigating the main menu
• The MUSIC, MIC, MODE, EQ, and SETUP menus

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1. Control Section Layout

Control	Function
Type-C port	Auxiliary Type-C connection
USB / DSP SET port	USB drive playback and DSP configuration
Display screen	Shows the current input, playback status, and menu screens
Rotary encoder (large knob, right side)	Rotate to navigate menus and adjust values; press to select/confirm
MODE button	Cycles the input source: Bluetooth → USB drive → SD card → Bluetooth TWS
Play/Pause button	Pauses or resumes playback
Repeat button	Toggles loop/repeat playback
Previous / Next buttons	Skip to the previous or next track

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1. Top and Rear Panel Layout

1	Control Section (as above)
2	Input channel level control
3	Input channell signal indicator
4	Input channel Mic/Line level selector
5	XLR/Jack channel inputs
6	Auxiliary input 3.5mm/RCA
7	XLR line output
8	Power on/off
9	IEC power inlet & fuse holder

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2. Powering On

When the unit is switched on, the boot screen briefly displays the Citronic logo.

The unit then loads the Home screen, which is the default display. Bluetooth is switched off by default every time the unit is powered on.

The Home screen shows:

• MODE – the active input/preset name (e.g. MUSIC)
• INPUT – a live input level meter

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3. Status Icons

Across the top of the player screen, a row of icons shows the current input and playback state. Each icon changes color to show it is active:

• Bluetooth icon – lights up when Bluetooth input is selected
• USB drive icon – lights up when a USB drive is connected and selected
• SD card icon – lights up when an SD card is connected and selected
• TWS icon – lights up when Bluetooth TWS (stereo pairing) is active
• Pause icon – changes color when playback is paused
• Sequential-play icon – changes color when tracks are playing in order
• Repeat icon – changes color when single-track repeat is engaged

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4. Selecting an Input Source

Press the MODE button on the front panel to switch between input sources, in this order:

1. Bluetooth
2. USB drive
3. SD card
4. Bluetooth TWS

If a USB drive or SD card is inserted, or the MODE button is pressed, the unit automatically jumps to the MP3 playback screen for that source.

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5. Playback Controls

While a track is playing, use the front-panel buttons below the screen:

• Play/Pause – pause or resume the current track
• Repeat – loop the current track
• Previous / Next – skip tracks
• Rotary knob (rotate left/right) – adjust the playback volume
• Rotary knob (press once) – open the main menu

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6. The Main Menu

Press the rotary knob once from the Home screen to open the main menu. Rotate the knob left or right to move between the six menu items, and press the knob to open the highlighted item.

Icon	Menu	Description
MUSIC	Returns to the music player screen
MIC	Microphone volume, EQ, priority, echo, and effect settings
MODE	Sound presets (MUSIC / CLUB / SPEECH / FLAT)
EQ	5-band graphic equalizer
SETUP	Display and system settings
EXIT	Closes the menu and returns to the Home screen

Throughout every menu, the same two-step pattern is used:

1. Select – rotate the knob to highlight an item
2. Confirm – press the knob to open it or apply the change

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7. MUSIC Menu

Selecting MUSIC from the main menu returns to the player screen, showing the elapsed/total time and a progress bar for the currently playing track.

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8. MIC Menu

Selecting MIC opens the microphone mixer settings:

Setting	Description
MIC VOLUME	Microphone input level
MIC EQ – HIGH / MID / LOW	3-band equalizer for the microphone, each adjustable from −6 dB upward
MIC PRIORITY	When ON, the microphone automatically ducks the music level while you speak
ECHO	Echo/reverb depth applied to the microphone
EFFECT	Reverb style applied to the microphone: options include Flat, Club, Speech, Warm Hall, Bright Hall, Bright Room, Warm Room, Plate, and Delay
EXIT	Returns to the main menu

To adjust a setting: rotate the knob to highlight it, press to select it, rotate to change the value, then press again to confirm.

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9. MODE Menu

Selecting MODE opens the sound preset screen, which displays a bass/treble response curve for the selected preset.

Available presets:

• MUSIC – balanced response for general listening
• CLUB – boosted bass for dance/club environments
• SPEECH – tuned for spoken word/vocal clarity
• FLAT – no shaping applied

Rotate the knob to highlight a preset and press to apply it. Whichever preset is selected is shown on the Home screen's MODE field, highlighted in yellow.

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10. EQ Menu

Selecting EQ opens the 5-band graphic equalizer.

Band	Frequency
Band 1	63 Hz
Band 2	400 Hz
Band 3	1 kHz
Band 4	2.5 kHz
Band 5	6.3 kHz

Each band can be adjusted from −12 dB to +12 dB. Rotate the knob to highlight a band, press to select it, rotate to raise or lower the level, then press again to confirm. Select EXIT to leave the EQ menu.

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11. SETUP Menu

Selecting SETUP opens the system settings screen.

Setting	Options	Description
LOGO LED	ON / OFF	Turns the illuminated logo on the unit on or off
DIM	ON / OFF	Dims the display backlight
BRIGHT	1–5	Sets the display brightness level
RESET	NO / YES	Restores the unit to factory default settings
EXIT	–	Returns to the main menu

As with the other menus, rotate the knob to highlight a setting, press to select it, rotate to change the value, and press again to confirm.

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Quick Reference

To do this...	Do this
Switch input source	Press MODE
Pause/resume playback	Press Play/Pause
Repeat a track	Press the Repeat button
Skip tracks	Press Previous / Next
Adjust volume	Rotate the knob (Home screen)
Open the main menu	Press the knob (Home screen)
Navigate any menu	Rotate to select, press to confirm
Return to Home	Select EXIT from the main menu