Electro-Voice SBA750 - Manual (Page 7)

Electro-Voice ® SbA750 User Manual 4
Status Indicators
These indicators provide information about the actual operational state of
the SbA750’s internal power amplifier.
Signal Indicates that an audio signal is present at the input and that it is
output.
Limit When lit this indicator signals that the internal power amplifier actu-
ally operated at the threshold of clipping. Short-term blinking is not critical,
because the amp’s audio limiter keeps distortion under control, so that the
sound is unaffected. Input overdrive, which results in sound degradation, is
a probable cause for a continuously lit indicator. To prevent this from
happening, reduce the input level.
VCP Lights when the power amplifier’s “Voice-Coil-Protection” is activated.
During dynamic peaks the integrated power amplifier is capable of produc-
ing output levels that exceed its stated nominal output capacity. Therefore,
the SbA750 employs a VCP circuit (Voice-Coil-Protection), which simulates
the thermal behavior of the speaker’s voice-coil, automatically reducing the
energy fed to the speaker system on the occurrence of thermal overload.
Protect Lights when one of the multiple comprehensive protections, e.g.
against thermal overload, HF, DC or Back-EMF of the power amplifier is
activated. Preventing the woofer from being damaged, it is shutoff via
relays in the protect mode. Additionally, the input level is being reduced.
During power-on the PROTECT LED lights for approximately 2 seconds,
which is normal. This only indicates that all protection circuitry has been
activated properly.
Power Switch
AC switch for switching the SbA750’s power ON or OFF. The switch lights after turning
the power ON. Make sure that the AC cord is correctly connected if the switch is not lit
upon turning the power on. If the AC cord is correctly connected and the AC switch does
not light upon power-on, please contact your local dealer.
AC Fuse
During normal operation the AC fuse of the SbA750 only blows at the occurrence of a
malfunction. Exchanging the fuse is only permissible using a fuse of the same type
(current, voltage and release characteristic). In case the fuse blows frequently, please
contact your local dealer.
AC Connector
AC connection is established via a PowerCon connector. A 15’ (5m) long AC cord with
PowerCon plug is supplied.
CAUTION: THIS APPLIANCE HAS NO USER-SERVICABLE PARTS INSIDE. LEAVE ANY
SERVICING AND MAINTENANCE QUALIFIED SERVICE TECHNICIANS ONLY.