Unika PA Series, Инструкция пользователя

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Important Precautions Introduction Front Panel Rear Panel Set Up Operating Modes Specifications
Protection Features
PROTECTION
SAFE POWER LEVELS AT DIFFERENT OUTPUT LOADS:
8-Ohm Loads: The amplifier can operate at its rated power level without risk of overheating. However, it may caused excessive temperature if it is pushed hard enough
to continually light the “CLIP” indicator, the amplifier's average output power can reach its maximum peak.
4-Ohm Loads: If the “CLIP” indicator flashes occasionally, the amplifier is approaching its Maximum long-term power capacity. If it is lit about half the time,
the amplifier channel will probably go into thermal protection within a few minutes.
2-Ohm Loads: Except for an occasional flash, keep the “CLIP” indicator dark to avoid overheating the amplifier channel. Clipping should be kept to a
reasonable minimum. An amplifier's peak current draw at full output power into 2 ohms is several times what the “normal” draw is, but its various protection
circuits will prevent this condition lasting more than a minute or two.
SHORT CIRCUIT PROTECTION -
The PA-500 amplifier comes with built-in Output Short Circuit Protects. The Output Short
Circuit Protection protects the output devices of the amplifier from short circuits and stressful loads. If your speaker lines shorted, the
amplifier automatically detects this problem and discontinued operation for that channel. If one side of your amplifier becomes shorted
and goes into protect mode, the other side will continue to operate normally. During short circuit protection, the “ACTIVE” LED will light
indicating amplifier fault. Channel output during the “Short Circuit Protection” will be interrupted (i.e. no sound output). Short Circuit
Protection can usually be traced back to the signal output line (i.e. speaker line). Check the line from the output terminal of the
amplifier to the speaker. If this line is good, check the internal speaker connections and components. A short circuit will usually be
traced to a bad cable or a bad speaker component and is rarely traced to the amplifier itself.
INPUT/OUTPUT PROTECTION -
The input circuits are isolated by resistors. An ultrasonic network uncouples RF from the output and helps to keep the amplifier
stable with reactive loads.
OPERATING VOLTAGE (AC MAINS) -
On the rear panel will indicate the correct AC mains voltage. Connecting to the wrong voltage is dangerous and may
damage the amplifier. Always be sure the source voltage for your areas matches the required voltage for your amplifier.
GAIN CONTROLS -
The gain controls are located on the front panel and are calibrated in 2dB of attenuation from full gain. It is best to adjust the amplifier so no
“hissing” is heard from speakers with no music being played, this will ensure the lowest possible distortion during normal operation.
AMPLIFIER FEATURES
SWITCH-MODE POWER SUPPLY:
The PA-500 is designed with SMPS power with CLASS D of Power Stage Topology instead of the traditional toroidal
transformer, therefore the total weight of the amplifier is ultra-light, and also the complete performance is better.
LED INDICATORS:
Each channel has three LEDs. One green LED indicates signal, one red LED indicates signal clipping and one red/blue LED indicates
protections mode for shorts/overload.
UNiKA PA-500