Master Audio
Xcellence Series.Ver 1.1
Nov 09
12
5.2. Parallel connection with subwoofer
You can connect the X-18W subwoofer in parallel with both X-12C and X-15C
cabinets. Please, follow the same parameters as explained in figures 7 and 8. Never
connect more than 4 units using the AC Stacking.
6. OVERVOLTAGE PROTECTION
The Xcellence series models incorporate protection against mains voltage overload.
In the mains input an electronic circuit compares the actual voltage with a reference
value. When the input tension exceeds 250 Volts, the circuit reacts by blocking the
input tension until it returns to its correct limits (230V +/- 10%).
When the overvoltage LED lights up red, the unit stops running, until the correct
voltage is re-established.
Generally the cause of such an anomaly tends to be a neutral voltage drop or
incorrect connection of the equipment to 400V supply. Whenever the overvoltage
LED lights up, check the tension of the electrical phases: other devices in the sound
system are also at risk of electrical fault.
7. FUNCTIONS of the INTERNAL DSP
All the XCELLENCE series are equipped with an internal DSP unit, which can be
operated by the LCD and keypad located at the rear panel of the cabinet and/or by an
external PC (RJ45 connector)
a) Through keypad
and without PC, the following functions will be accessible:
Gain Control, independent for each way (low and high).
Limiter Adjust, also independent for each way.
Delay Adjust, in meters or milliseconds.
Mute: temporary signal cut-off
Load a configuration: one of the 5 factory pre-loaded presets or one of the 16
available user memories
To gain access to these functions it is necessary to unlock the keypad, which is
automatically locked after some time of inactivity to avoid accidental or undesired
manipulation. To unlock the keypad, press the MEM key followed by OK. The LCD
will light up and show the current settings:
Name of the unit, ID: -- (
Bus identification, only used for PC connection
) and PR
(
loaded preset
) FACTORY.
At this point, all describved functions are accessible. Use the OK key to enter the
main menu and OK again to enter the Audio settings. Then with the left-right cursors
the Gain, Delay, Limiter and Mute are selected:
P01:FACTORY
X12C ID:--
