5

5. HANDLING PRECAUTIONS

Keep the input cable away from the output cable. If installed close to each other, oscillation could occur.
To avoid unit failures, never connect outputs of 2 or more units in parallel.
Only connect speakers with an impedance equal to or greater than those specified. Connecting speakers
with a smaller than specified impedance could cause damage to the unit.
• Periodically clean the filter located inside the ventilation panel on the unit's front panel. If the filter becomes
clogged, heat will become trapped inside the enclosure.
• Install the unit in locations where the temperature is between –10°C and +40°C (14°F and 104°F) and the
moisture is less than 90%RH (no dew condensation must be formed).
To clean, be sure to first switch off the unit's power, then wipe with a dry cloth. When the unit gets very dirty,
use a cloth damped in a neutral cleanser. Never use benzene, thinner, alcohol, or chemically-treated
cleaning cloth because such volatile liquids could deform or discolor the unit.

6. INSTALLATION PRECAUTIONS

When mounting the unit in an equipment rack, the inside of the rack must be sufficiently ventilated.
To achieve sufficient ventilation, remove all panels on the rear of the rack.
When mounting the unit in the rack, also mount a Perforated Panel larger than 1U in size*:
(1) at the top and the bottom of the rack, and
(2) above and below every 5 units.
* 1U size = 44.5 mm or 1.75" (reference size)
Perforated panel
Power amplifiers
DA-550F/500F-HL
Power amplifiers
DA-550F/500F-HL
Rack mounting screws are not supplied with the unit.
Be sure to use the screws with a diameter of over 5 mm (0.2") and
length of over 12 mm (0.47") to mount the unit.
Failure to do so may cause personal injury.

CAUTION