Initial Testing - MB QUART MBQX-SUB-2 Installation Manual

INITIAL TESTING

Confirm that everything is working as intended before final tuning, fitting and reassembly. Since you've
already had a Stage 2, 3 or 5 system previously installed, this initial testing is simply addressing the amplifer
and subwoofer added in this installation manual procedure.
STEP 1 – RECONNECT THE BATTERY
First, ensure the battery is fully charged. Using a 10mm socket, then
reconnect the negative terminal of the negative battery cable as indicated.
STEP 2 – CONNECT SOURCE UNIT
Connect the electrical plug and two RCA audio cables to the source unit.
The "FRONT" RCA outputs connect to the high frequency (400.2) amplifier.
The green "SUB" RCA outputs connect to the low frequency (400.1)
amplifier. Temporarily set housing in place, but do not yet attach mounting
screws. This will allow for any corrections of wiring if needed.
STEP 3 – TURN ON IGNITION / PLAY SOURCE
Turn the ignition key to the ACC position. Play some kind of music from the
source unit to begin with an audio signal (via USB, BT, AM/FM, etc.).
STEP 4 – SUB FREQUENCY and LEVEL SETTING - In the settings menu,
set the source unit's SUB OUT (Low Pass) crossover at 100Hz. Next, set
the source unit's SUB OUT level at 35dB for the initial testing. A level setting
of 35dB will allow the recommended gain control settings on the subwoofer
amplifier to perform distortion-free, while also allowing you to fine tune any
bass-heavy music by easily reducing the sub level setting from the source
unit.
STEP 5 - VERIFY AMPLIFIER CONNECTED TO SUB - If the new subwoofer is playing, the new subwoofer
amplifier is connected. Confirm settings are correct if something doesn't sound exactly right. Refer to page
7, 8 and 11 for initial amplifier settings during the amplifier plate installation. If everything is working and
producing sound, proceed to the next section - Fine Tuning.
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