DL451 - Understanding airflow and adequate ventilation.

The fan speed is set and cannot be altered or turned off.

The air arrives through the front panel grill and in to the front bulk head fan which sucks air IN.

front
       in                                          in
This allows the hot air generated from both the PSU and the processor PCB that is static inside the unit, to then be pushed OUT via the rear vent.

rear
The rear vent is situated on the left and can be seen here in this close-up. 
vent
                 out
There is also the same type of fan fitted on top of the internal PSU and the hot air is also dispersed via the same process.

Adequate airflow is essential to aid trouble-free use of the DL451. Even if the unit is rack-mounted or moved around for convenience, it is strongly advised that neither the front or rear of the unit is obstructed or modified in anyway to prevent the airflow to pass through.

Failure to do this can cause the unit to enable thermal cut-out and shutdown, all audio will be lost during this period until the temperature of the unit has cooled.

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