Bedienungsanleitung Alto Professional Black 15 sub (Seite 7 von 36) (Deutsch, Englisch, Holländisch, Französisch, Italienisch, Spanisch)

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Features

Rear Panel

1. Power Input: Use the included IEC power cable

to connect this input to a power source.

2. Fuse: If the unit's fuse is broken, lift this tab to

replace the fuse. Replace it with a fuse with an

appropriate rating (printed under the unit's power

cable input). Using a fuse with an incorrect rating

can damage the unit and/or fuse.

3. Power Switch: Use this switch to power the

subwoofer on or off.

4. Power/Standby LED: This LED illuminates when

the subwoofer is powered on.

5. Standby On/Off Switch: By default, this

subwoofer has its Standby Mode enabled: when

no incoming audio signal is detected for

approximately 15 minutes, the subwoofer will

enter a low-power state. The subwoofer will exit

Standby Mode within 0.5 seconds of detecting an

incoming audio signal. Change this recessed

switch's setting to the Off position to disable this

feature.

6. Logo On/Off Switch: Press this to turn the light

in the Alto Professional logo on or off.

7. Polarity Switch and LED: Press this switch to toggle the polarity of the subwoofer's acoustic output. In

some cases, reversing the polarity can help reduce any interference in the frequency overlap between

the subwoofer and main loudspeaker. When the LED is off, the subwoofer is set to its default positive

polarity (the recommended setting when used with Black Series loudspeakers). When the LED

illuminates red, the subwoofer's polarity is reversed from its default.

Important: When using multiple Black Series subwoofers, make sure they are set to the same polarity

to avoid cancellation of the bass frequencies.

8. Inputs: Use a standard XLR or 1/4" (6.35 mm) cable to connect your audio source to this input. This

input accepts both line-level sources only.

9. Input Volume Knob: Use this knob to set the level of the audio going into the inputs. The Black 15sub

is engineered to work seamlessly together with Black 10, Black 12, or Black 15 loudspeaker models.

For optimal bass balance, set the Black 15sub input volume knob to the 12 o’clock-position detent, and

set the Black 10, Black 12, or Black 15 volume knobs to their maximum clockwise position. Adjust the

volume controls as needed to further fine-tune the audio level from each system.

10. Signal/Limit LED: This LED illuminates green when an incoming audio signal is detected. It

illuminates red when the audio signal level is too high and is being dynamically reduced to protect the

subwoofer from damage or distortion. If this LED is continually illuminated red, or if the audio output

sounds excessively distorted, then reduce the volume of the connected audio source, or reduce the

setting of the Input Volume Knob.

11.

Outputs: Use a standard XLR cable to connect this balanced output to the input of a Black Series

loudspeaker. Audio is sent from this output at 0 dB.

12. Crossover Bypass Switch and LED: Press this switch to toggle between Standard and Bypass

Modes. When the LED is off, the subwoofer is in Standard Mode (the default) where the XLR outputs'

signal is high-pass-filtered to be sent to a full-range loudspeaker. When the LED illuminates green, the

subwoofer is in Bypass Mode where the XLR outputs' signal will be unfiltered and full-range (the XLR

outputs effectively function as loop-through connectors in this case).

13. Ground Switch: Engage (depress) this switch to reduce hum or noise.

14. DSP Mode Button: Press this button to cycle through the subwoofer's internal low-pass crossover

DSP settings, as shown on the rear panel. The LED next to the setting will illuminate when selected.

For most applications, we recommend using the 80 Hz or 100 Hz setting; use the 120 Hz or 140 Hz

settings to increase mid-bass impact.

15. Pairing Button and LED: Press and release this button to pair the subwoofer to your iPad or iPhone.

The Pairing LED will illuminate when it is paired. See the Bluetooth Pairing section for instructions.

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Alto Professional Black 15 sub Seite 7

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