Alto APX1500, Быстрый старт

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FRONT PANEL DIAGRAM
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1. POWER SWITCH – Turns the amplifier on/off.
2. POWER LED – Illuminates when the amplifier is on.
3. LED METERS – Indicates the audio signal level. This LED will light up when the signal at the output is at least -
20 dB.
4. CLIP – The red "Clip" light indicates the signal is distorting or "clipping," which occurs when the volume
exceeds the amplifier's maximum output. This LED will flash when distortion reaches a level of 0.5%.
Consistent clipping can damage your amplifier and speakers. If the signal is regularly clipping, reduce the
volume of the amplifier. If it is lit about half the time, the amplifier channel's thermal protection will cause
the channel to shut down within a few minutes.
5. PROT – The red "Prot" light indicates the output for that channel has turned off to protect your amplifier and
speakers, which can be damaged by excessive volume resulting in clipping. If the meters' red lights are
illuminating, decrease the levels of your CHANNEL GAIN knobs.
6. CHANNEL GAIN – This knob controls the channel's output signal.
7. COOLING VENTS – These vents help to cool the internal parts of the amplifier when in use. Do not block
these vents, and keep the vents clean at all times.
SPEAKER CONNECTION
SHORT CIRCUIT PROTECTION
Output short circuit protection protects the output devices of the amplifier from short circuits and
stressful loads. If your speaker lines short, the amplifier automatically detects this problem and
discontinues operation for that channel. (If one channel's short circuit protection is activated, the other
channel will continue to operate normally.) During short circuit protection, the "Clip" and "Protect"
LEDs will light simultaneously, and all output from that channel will stop.
Short Circuit Protection can often be traced back to the signal output line (i.e., the speaker line).
Check the line from the output terminal of the amplifier to the speaker. If this line is still good, check
the internal speaker connections and components. (A short circuit can often be traced to a bad cable or a bad
speaker component and is rarely traced to the amplifier itself.)
Bare Wire Connections:
When connecting your speakers to the amplifier using bare wires, follow these steps:
1.
Unscrew the red and black caps of the binding posts. (Be sure not to completely remove or unscrew the red
and black caps.)
2. Strip back the wire insulation 1/2" (13mm).
3.
Insert the bare wire into the hole exposed under the binding post cap.
4. After inserting the wire, screw the binding post cap down on the wire.
Spade Connector:
When connecting your speakers to the amplifier using spade connectors, follow these steps:
1.
Unscrew the red and black caps of the binding posts. (Be sure not to completely remove or unscrew the red
and black caps.)
2.
Insert the spade connectors into the binding posts.
3. Tighten the caps down on the spade connectors.
Banana Connectors:
When connecting your speakers to the amplifier using banana connectors, follow these steps:
1.
Be sure that the red and black caps of the binding posts are tightened completely.
2.
Insert the banana connectors into the caps of the binding posts. Be sure that the connectors are inserted
securely.
WARNING!:
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Do not make any connections when any device is powered on.
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Do not allow the wires from terminals to come in contact with each
other.
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Do not connect either positive (red) output to chassis ground.