Commands And Functions - dB Technologies OPERA LIVE Serie Caractéristiques Techniques

Carts and stands
Use only with a cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the
apparatus. When a cart is used, use caution when moving the cart/apparatus combination to avoid
injury from tip-over.
Non-use Periods:
Unplug this apparatus during lightning storms or when unused for long periods of time.
Object and Liquid Entry
Care should be taken so that objects do not fall and liquids are not spilled into the enclosure through
openings.
Damage Requiring Service
Refer all servicing to qualified service personnel. Servicing is required when:
- the apparatus has been damaged in any way;
- the power-supply cord or the plug has been damaged;
- the liquid had been spilled or objects have fallen into the apparatus;
- the apparatus has been exposed to rain or moisture
- the apparatus does not operate normally or exhibits a marked change in performance;
- the apparatus had been dropped.
Servicing:
The user should not attempt to service the apparatus beyond that is described in the Operating
Instructions. All other servicing should be referred to qualified service personnel.
IMPORTANT NOTES
This manual is to be considered an integral part of the product, and must always accompany the
speaker when it changes ownership as a reference for correct installation and operation as well as for
the safety regulations.
dB Technologies will not assume any responsibility for incorrect installation of the speaker.
OPERATING PRECAUTIONS
- Do not force the amplifier incorporated in the speaker to work in overload for extended periods
of time.
- Never force the control elements (switches, controls, etc.).
CAUTION
- Make sure that the speaker is positioned in a stable and secure way in order to avoid any
dangerous conditions for persons or objects.
CONNECTION
CAUTION
- For connecting the speaker, use only qualified and experienced personnel having sufficient
technical knowledge or specific instructions for making the connections correctly and thus
preventing electrical dangers.
- To prevent the risk of electrical shock, the speaker must only be supplied from the mains after all
connections have been completed.
- Before powering up the speaker, it is advisable to re-check all the connections, making sure in
particular that there are no short circuits.
- The entire sound system must be designed and installed in compliance with the current
standards and regulations regarding electrical systems.
CAUTION
- To prevent inductive phenomena from giving rise to hum or disturbance which would jeopardize
efficient speaker operation, the cables that transmit microphone signals or line level signals
(e.g. 0 dB/V) must be screened and should not be run in the vicinity of:
1) Equipment that produces strong magnetic fields (e.g. large power supply transformers)
2) Electrical energy conductors
3) Lines that supply speakers.
PROTECTION SYSTEM
The speaker is equipped of a exclusive system, which protects the loudspeakers against overheating,
ensuring the maximum reliability in all professional applications. In addition, a sophisticated system
incorporated in the amplifier handles the limiter circuits and the protection against overheating and
short circuits.
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COMMANDS AND FUNCTIONS

AMPLIFIER PANEL (FIG. 1)
1) "VOLUME" CONTROL
The knob regulates the diffuser's volume.
This control does not affect the output "LINK" levels.
2) "INPUT SENSITIVITY" SENSITIVITY SWITCH
Position the switch in LINE to use a line level source (0 dB) or MIC to use a
microphone.
3) "LIMITER-PROTECTION" INDICATOR LIGHT
The "LIMITER-PROTECTION" indicator light comes on red during start (for a few
seconds) and when the internal audio limiter engages. This avoids the amplifier's
distortion and protects the loudspeakers against overloads.
4) "POWER ON - READY" INDICATOR LIGHT
The "POWER ON - READY" indicator light comes on green to indicate that the
amplifier is switched on and it is working properly.
5) EQUALIZATION CONTROL
This control permits the equalization of the speaker.
The "FLAT" central position permits a linear sound reproduction of the speaker. By
turning the control towards "VOICE", the response curve of the speaker highlights
the mid frequencies while if the control is turned towards "MUSIC", the low and high
frequencies are highlighted.
This control does not affect the level of the output signal (link).
6) "BALANCED INPUTS LINK" CONNECTORS
These balanced inputs can be used to connect balanced or unbalanced
microphones or audio sources at line level (0dB) (eg. preamplifier, mixer, recorder,
CD player, musical instrument, ...).
The balanced connector is connected in parallel and can be used to send the audio
signal to other amplified speakers, recorders or supplementary amplifiers.
7) POWER SWITCH "POWER"
This switch can be used to switch the diffuser on and off.
8) POWER CABLE SOCKET "MAINS"
Used for connecting the power cable supplied.
9) FUSE CARRIER "FUSE"
Mains fuse housing.
10) VOLTAGE CHANGE "VOLTAGE SELECTOR"
For changing the power voltage of the speaker (240/120V).
This switch is preset and protected by the manufacturer.
SPEAKER FRONT (FIG.2)
1) INDICATOR LIGHT
The blue indicator light indicates speaker start.
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