Monitor Audio GSW12 Crossover setting Stereo left & right input only, Sub-Sonic filter, Phase

Crossover setting (Stereo left & right input only)

The crossover control should be set in accordance with the size or bass output of the main/satellite speakers. The crossover control can be adjusted in steps of 40Hz, 50Hz, 63Hz, 80Hz, 100Hz, 125Hz and 160Hz. The crossover slope characteristic can also be adjusted from 0 to 54dB/Octave in steps of 6dB. Refer to the chart below as a guide to setting the crossover frequency control to the optimum position. Much will depend on the correct low frequency response of the main speakers and their position in your room. Experimentation is advisable.

Sub-Sonic filter

Type of Main Speaker	Monitor Audio Product	Crossover Control Setting
Large floor-standing speaker	GS20/60; RS6/8; BR6	40-60Hz
Small floor-standing speaker	RS5; BR5; R270	60-70Hz
Large stand-mount/bookshelf speaker	GS10	50-80Hz
Small stand-mount/bookshelf speaker	RS1; BR1/2; R225/250	60-90Hz
Small satellite speaker	R45/90/180	80-160Hz

An adjustable sub-sonic filter is provided to limit the reproduction of infra-sonic frequencies being produced below a useable frequency point. Frequency settings are at 16, 20, 25 and 31Hz with a variable slope characteristic from 0 to 54dB/Octave in steps of 6dB.

EQ

There are five EQ modes to choose from:-

4 x pre-set options (which can be accessed by remote control during operation) Music, Movies, Dynamic & Impact. These can be set at any time in accordance with personal choice or the predominant operation of the system.

NOTE: The Graphic EQ cannot be adjusted when using the 4 x pre-set modes.

1 x User mode (FLAT). The FLAT (User mode) mode can be accessed only by remote control. Pressing the ‘movies’ button (for example) when already in the movie setting will select the FLAT mode. This will now allow the installer/user to access the 10 band graphic equaliser settings and make adjustments. +/- 6dB gain or cut can be obtained at the pre-set frequency divisions of 20Hz, 25Hz, 31Hz, 40Hz, 50Hz, 63Hz, 80Hz, 100Hz, 125Hz, and 160Hz. The FLAT EQ setting will change to ‘USER’ when any changes have been made to the graphic equaliser.

To access the FLAT/ USER graphic equaliser, you need to be in this EQ setting before entering the set up menu. These features can be used to provide a more accurate ‘in room’ balance and is particularly effective at counteracting room modes or positioning anomalies. A 1/3 Octave spectrum analyser or hand-held dB level meter, capable of accurately measuring down to 20Hz will be required to achieve optimum settings.

Night Mode

This setting limits overall dynamic capability and SPL by using a compressor type limiter.

Phase

The Phase Control is used to synchronise any delay between the GSW12 and main/satellite speakers. When the GSW12 is in phase with the main/satellite speakers the sound should be full bodied. Sit in a normal listening position whilst adjusting the phase settings. When set correctly the location of the subwoofer should be almost undetectable. Experimentation is advisable. However it should be noted that in most cases the phase control should be set to 0 degrees, especially when using a digital A/V processor or A/V receiver amplifier.

Auto Off

This menu allows the user to select the auto turn off delay time. The time delay can be adjusted from 5- 25 minutes in 5 minute intervals.

Save data

Push the control button (or press enter) to save your set-up data. The display will show SAVE OK, to confirm the settings have been saved successfully. These settings will now be remembered when the GSW12 is switched off.

Volume level adjustment

Once data has been saved the volume can be adjusted to the desired level either by the main control panel or by using the remote control. Accurate level (volume) calibration can be done by using the auto-set up procedure of the A/V processor/receiver – See manufacturer’s user guide for details. Alternatively a 1/3 Octave spectrum analyser or hand-held dB level meter, capable of accurately measuring down to 20Hz can be used to check and adjust the volume level.

Monitor Audio 2007 GSW12 Rev 1

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