Front Panel; Rear Panel; Balance Barrier Strip Input - Phonic ICON300 User Manual

Front Panel DescriPtion
1. Power switch
The power ON/OFF switch with an LED indicator.
2. Protect leD indicator
The Icon 300/700 features several types of protection to prevent
damage to the circuitry during turn-on or fault conditions. If the
LEDs light up, this indicates that one of the various protections
is safeguarding the different sections of the amplifier and in
these cases, the power output is normally switched off until
normal operating conditions are restored.
 Loudspeaker protection: the power-on protection relay
prevents damaging thumps to the speakers as the power
comes on. When the amp is switched on, the protect LED
will light for a few seconds, and then go out, indicating that
the relay has closed.
 Thermal protection on the heat sink: If the amp overheats,
thermal shutdown protects the circuitry until the temperature
is reduced to a safe level.
 Short circuit protection: The Protect LED Indicator will also
light up if the speaker terminals are short-circuited, or the
impedance of the load is too low. In these circumstances,
the Protect LED will stay on until the fault conditions are
rectified.
Some protection situations require the amplifier to be
switched off and then back on for normal operating
conditions to be restored.
3. clip leD indicator (icon 300)
The LEDs light up at clipping status, whenever any conditions
occur that could cause problems for the amp, such as an out-
of-spec load and waveform distortion. Because of the Icon's
ability to enter and exit clipping with as few audible artifacts as
possible, you may not hear any distortion even if the indicator
flashes. In general, a few flashes every now and then will not be
a problem. However, if the LEDs flash often or remain on for any
extended period of time, then turn down the volume controls
to reduce the signal level going to the Icon amp. If this doesn't
solve the problem, check your output cables and speakers.
4.Signal "Status" LED Indicator
Each channel of the Icon 300/700 features a signal LED to show
that there is an audio signal at the input to the channel. The
threshold for the indicator is -26dB, which should be enough to
avoid noise triggering the LED.
5. limit leD indicator (icon 700)
The Icon 700 has a built-in limiter on each channel to prevent
clipping. Should the signal reach a level high enough to cause
clipping (ie. output power is over 400W per channel), the limiter
momentarily reduces the input signal level, just enough to
prevent it. The limit LED lights whenever this occurs.
ICON 300/700
+ - 0 70 100
rear Panel DescriPtion
6. Gain controls
These two knobs and the level controls for channels one and
two respectively. Turning clockwise will increase its gain and
counter clockwise will decrease its gain. Please always power-
up with the volume all the way down, and increase the volume
slowly to make sure that no conditions exist which could annoy
your audience or harm your speakers.
7. cH1/cH2 inputs (Xlr connectors)
These inputs are provided for making balanced connection to
mixers, preamps, etc. The XLR inputs are wired as per the
following convention:
8. Balanced Barrier strip inputs
These connection points provide the best option for permanent
or long-term installation. Connections should be screwed down
tight to exclude oxygen, and care should be taken to avoid loose
strands of wire that may cause short circuits.
9. CH1/CH2 Parallel Pass Through XLR Connectors
These XLR output connectors are provided for parallel
connection to another Icon or other amplifier.
10. Stereo/Parallel/Bridge Switch
In stereo operation, two separate signals are treated separately
by channels 1 and 2 of the amplifiers.
In Parallel operation, one signal is treated by bother channel
1 and 2 of the amplifier. In other words, a signal connected to
Input CH1 (6) or CH2 (7) is sent to both Output CH1 (10) and
CH2 (11).
In Bridge operation, both channels are configured to drive a
single load with a single signal to CH1 (only CH1 is operative,
and CH2 input must be vacant) at twice the power.
This switch should only be used when the Amplifier is off;
otherwise the speakers' components could be damaged.
11. Direct output connectors, cH1/cH2
These are barrier strips to connect low impedance speakers.
Spade lugs and bare wires should both be screwed down tight
to exclude oxygen, and care should be taken to avoid loose
strands of wire that may cause short circuits.
12. audio transformer outputs, cH1/cH2
These are barrier strips to connect distributed line (2V, 70V,
100V, 140V and 200V). Spade lugs and bare wires should both
be screwed down tight to exclude oxygen, and care should
be taken to avoid loose strands of wire that may cause short
circuits.