Apogee APL-10 Spécifications télécharger pdf (Page 15)

(2) Input and Output Connectors

The input and output connectors are wired as follows:

XLR Pin #

Function

Pin 1 Earth & Chassis Ground

Pin 2 Signal + DIFFERENTIAL INPUT

Pin 3 Signal - DIFFERENTIAL INPUT

Connector Case Earth & Chassis Ground

A positive signal applied to pin 2 of the XLR will result in a positive acoustic

pressure wave (excursion) appearing at the front of the drivers in the speak-

er system. Conversely, a positive signal appearing at pin 3 of the XLR will

result in a negative acoustic pressure wave (recursion) appearing at the front

of the speaker system’s drivers.

(1) Level Control

A single level control is located just above the XLR input. Under normal cir-

cumstances, the level control should be turned fully clockwise to the 0 posi-

tion. This is full gain, or 0 dB of attenuation. In certain environments, for

example, very quiet productions, it may be desirable to reduce the gain of the

powered speaker to improve the overall gain structure of the entire audio

system and possibly reduce system noise slightly. This is easily achieved by

turning the level down to the desired amount of attenuation.

When multiple speakers will be attenuated, it is best to count the detent

positions as the level control is adjusted. By doing this, you will be able to

accurately set each speaker to exactly the same attenuation.

It is important to confirm that the level is set appropriately before deploying

the speaker into a location where it will be difficult to reach.

(2) Mute Control

Each channel of the internal amplifier has a user accessible mute button.

Muting the LF1 or LF2 amplifier output can be useful in troubleshooting a

system. The two buttons are labeled Ch1 and Ch2. Channel 1 is the LF1 amp

and Channel 2 is the LF2 amp. Mute is enabled when the button is out. It is

important to confirm that both buttons are depressed (un-muted) before

deploying the speaker into a location where it will be difficult to reach in

order to un-mute a channel.

Controls

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 35 36

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Apogee APL-10 Spécifications Page 15