Bogen & WV250 Rear Panel Controls, Output Limiter, Load Selector Switch, Low-CutSwitch, Operation

Operation

Output Limiter

The Output Limiter control sets the threshold at which the unit hard limits the output signal. Once the Limiter's threshold is exceeded, the output signal is prevented from increasing any further.With the control set to the Min position (fully counterclockwise), the Limiter will pro- vide almost no limiting and is essentially turned off. It will only engage when very large output levels are produced. As the control is turned clockwise, more limiter function will be allowed and the output level necessary to engage the Limiter decreases.

Typically, the Limiter is set to prevent clipping caused by overdriving the amplifier beyond its maximum output level.This setting is established by using both the Output Level Meter and the Limiter LED.

First, adjust the amplifier’s output level until the Output Level Meter registers in the amber region.Then, adjust the Output Limiter control until the Limiter LED illuminates intermittently. The LED associated with the Limiter illuminates when the Limiter is engaged. If the output level of the amplifier exceeds this point, then the Limiter will engage, thereby keeping the Output Level Meter in the amber region. The Limiter can also be set to restrict the amplifier's output level to a desired level below the amplifier's maximum level to provide a means of limiting the system's volume level. In this case, the amplifier is driven to the desired output level and then the Limiter control is adjusted so that it begins to engage. In general, input and master controls should be set so that the Limiter engages as little as possible.

Rear Panel Controls

Load Selector Switch

A large slide switch next to the amplifier’s output barrier strip deter- mines transformer-coupled or direct output operation. The setting of this switch controls which amplifier output terminals are active and what type of filter shape will be used for the bass control. See the Connections section for more information about the load selector switch.

Other Controls (Located In Module Bay 6)

Tone Control Bypass Switch

A slide switch that can bypass the effects of the Bass and Treble controls is located on the back plane of module bay 6. It is sometimes desirable to bypass the tone controls when other forms of system equalization are used. A screwdriver can be used to set the switch. The switch must be set before a module is installed in this bay.

Low-Cut Switch

The Power Vector Amplifier provides a low-cut filter that rolls off frequencies below 125 Hz. The slide switch for this function is located on the back plane of module bay 6. A screwdriver can be used to set the switch.The switch must be set before a module is installed in this bay.

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