MB QUART RAA4200 manual SET-UP Features, Adjustments, Operation, Front END Defeat, Crossover

OPERATION

SET-UP FEATURES

The MB Quart R Series amplifier offers a wide range of selections for the user to create a listening environment that meets your personal preference.

Before making final adjustments, read through the descriptions for each feature to get the best results.

ADJUSTMENTS

Loosen the allen screw holding the small cover in place over the controls. Tilt the cover up and away from the amplifier. After making adjustments, always ensure the cover is in place to prevent accidental changes to the settings.

NOTE: Failure to follow these instructions may result in a loss of sonic quality. This is caused by premature activation of the protection circuitry to maintain the integrity of the amplifiers sensitive components. The performance specifications listed in this manual cannot be guaranteed under such conditions.

FRONT END DEFEAT

The front-end defeat switch is responsible for rerouting the signal around the

signal processing circuitry within the amplifier. This feature was designed for use with external processors to provide the purest possible signal path through the amplifier.

With this configuration, the MB Quart R Series amplifiers are able to provide lower distortion and better signal reproduction due to the reduction in the number of components in the signal path. Bypassing the crossover will also eliminate the typical phase shift associated with the analog filter transform function. While the Front End Bypass is turned on, all adjustments made to the gain or crossover will be bypassed.

CROSSOVER

Do the following individually for each channel.

Filter Switch

Placing the switch in the ON position (In Position) sets the amplifier to the All Pass mode, preventing any crossover adjustment, allowing all frequencies to pass. Adjustments made to the Multiplier switch or Frequency Adjuster are bypassed.

Frequency Switch

Placing the switch in the HPF position (In Position) sets the amplifier to the High Pass mode, enabling frequencies above the cut-off point to pass.

Placing the switch in the LPF position (Out Position) sets the amplifier to the Low Pass mode, enabling frequencies below the cut-off point to pass.

Multiplier Switch

This switch sets the multiplier for the crossover frequencies.

Placing the switch in the x10 position (In Position) sets the adjustable crossover frequency to 500-5KHz (5000Hz).

Placing the switch in the x1 position (Out Position) sets the adjustable crossover frequency to 50-500Hz.

Frequency Adjustment

After setting the Frequency Switch and Multiplier Switch, use the Frequency Adjuster to set the desired cut- off point.

Turning the adjuster counter-clockwise decreases the set frequency.

Turning the adjuster clockwise increases the set frequency.

Quick Setting: Decrease the crossover frequency all the way down. With the system playing, increase the crossover frequency up slowly until the desired crossover point is achieved.

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