Toa DA-250FH CU - Manual (Page 11)

11
1. Power switch [ ON / OFF]
Turning this switch on causes the amplifier to
function, and turning it off causes the amplifier to
cease function.
Note: The unit is not completely disconnected
from the power supply even if this Power
switch is turned off.
2. Power indicator [POWER]
Lights blue when the Power switch (1) is turned
on.
3. Input level controls
[CH 1/BRIDGE 1, CH 2, CH 3/BRIDGE 2, CH 4]
Adjust the input level of each channel.
Turn the control clockwise to increase the input
level and counterclockwise to decrease the level.
4. Ventilation panel (Air Vent)
A filter is located inside the ventilation panel.
To clean the filter, remove the ventilation panel.
(See p. 18; Cleaning the Filter.)
5. Indicators [INPUT, OUTPUT, PEAK, PROTECT]
The indicators are as follows from left to right:
• Input indicator [INPUT]
Lights green regardless of the input level
control setting when an input signal level
exceeds about –20 dB.
• Output indicator [OUTPUT]
Lights yellow when an output level exceeds
about 1 W at an 8 Ω load (DA-250F) or 19.6 Ω
load (DA-250FH).
• Peak indicator [PEAK]
Lights red when an output signal clips
(distortion occurs).
Note
When the Peak indicator lights, turn the input
level control (3) counterclockwise until its light
extinguishes or decrease the input signal level
of the connected external device.
Operating the unit while the Peak indicator
remains lit may cause the protection circuitry to
be activated.
• Protection indicator [PROTECT]
Lights red when the protection circuitry is
activated. (See p. 17; Protection Operation
List.) When the power is switched on, this
indicator lights for about 2 seconds and then
extinguishes.
When a bridge connection is made
• When Channels 1 and 2 are bridge-connected
(BRIDGE 1 ON/OFF switch (9) is set to ON),
the CH 1/BRIDGE 1 level control adjusts the
input levels of Channels 1 and 2. In this event,
the CH 2 level control cannot be used.
• When Channels 3 and 4 are bridge-connected
(BRIDGE 2 ON/OFF switch (9) is set to ON),
the CH 3/BRIDGE 2 level control adjusts the
input levels of Channels 3 and 4. In this event,
the CH 4 level control cannot be used.
1 2 4 3 5
Note: The figure shows the DA-250F.
7. NOMENCLATURE AND FUNCTIONS
[Front]