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6. Quick Start Guide to initial setup
6.1 Unpacking
6.2 Rack Installation
6.3 Ventilation
6.4 AC/DC Power connection
While unpacking the amplifier, please inspect the amplifier. If you find any damage, notify your
supplier immediately. Be sure to save the carton and all packing materials in case you have to send
the product to the supplier. Please use only the original factory packing. If the shipment carton is
unavailable, contact your local dealer to obtain a replacement unit. A factory packed carton contains:
• Entero
ESA 8125 or ESA 8250 power amplifier
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• IEC-type detachable power cord
• Safety and Installation Guideline
• Connector accessory pack
• Rear rack ear mounting kit
The Entero
ESA 8125 & ESA 8250 power amplifiers are designed to fit standard 19" rack equipment,
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occupying 2 rack-units in height. Use four fasteners with washers (not supplied) to mount the amplifier
front panel rack ears to the 19" rack rails. Rear rack mounting is also featured by using the supplied
mounting kit. To meet EN54-16 requirements, the amplifier(s) must be fixed at the rear!
The Entero
ESA 8125 & ESA 8250 are designed for continuous operation with ambient
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temperatures of up to 40° C. However, to ensure safe operation, the front-panel and rear airflow
ventilation openings should never be blocked. Air flows into the front of the unit and exits at
the rear. The internal fans automatically increase their speed when the internal temperature
increases due to the amplifier producing higher output power. Should the unit exceed safe
operating temperature, the unit will mute 1 or more outputs and these will enter a protection
state, indicated by 1 or more protection LEDs on the front panel. The amplifiers will return back
into operation when the temperature is reduced.
The Entero
ESA 8125 & ESA 8250 feature high efficient Switch Mode Power Supplies and can
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operate from an AC mains voltage of 230 Vac (-15%/+10%, 50/60Hz), or from a DC battery voltage
of 48 Vdc (-15%/+10%), The presence of both power sources is indicated on the front panel by a
'230 Vac' and a ' 4 8 Vdc' LED.
When multiple amplifiers are used in a system: do not turn ON all amplifiers at the same
time, this can result in a too high inrush current for the AC mains supply. Turn ON each amplifier
one by one!
NOTE: All rated output power levels are measured during 230 Vac & 48 Vdc operation, with all
channels connected. When powered from a 48 Vdc battery source, the rated power is delivered
until the battery voltage drops below 44 Vdc.
6. Quick Start Guide to initial setup
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