EPOS M Series manual Phase, Power Switch, IEC Socket Mains, AC Voltage Selector Switch

Phase

Adjustment is necessary to properly integrate the output of the M subwoofer to match the respective phase of the front, centre and rear speakers in your 5.1 system. Phase describes the polarity of the sound waves travelling to your ears. Positive means moving forward and negative means moving back. If the sound from your front speakers is designed to be more positive at their low frequency extreme, it will be necessary to adjust the output of the M subwoofer to also be positive, otherwise they will tend to cancel one another out and reduce the level or distort or colour the sound. As every situation will be different as speakers vary from make to make and room to room, adjustments should be done simply by trial and error. You will easily hear which setting best suits your system after you run it with a signal and adjust the Phase until you hear the most pleasing result.

Power Switch

This switch turns the subwoofer 'ON' or 'OFF' (When left in the ON position without a signal it allows the 'STANDBY' feature to become active).

IEC Socket (Mains)

Connect to an appropriate mains socket via the IEC Power Cable supplied.

AC Voltage Selector Switch

Please ensure the AC Voltage selector is in the correct position. (See Page 1)

OVER CURRENT CUTOUT

The M subwoofer does not use a compression limiter to pre-distort the signals it cannot handle, to prevent it from cutting out. No amplifier has infinite power capabilities and has to be protected from destroying itself under extreme conditions. To protect the M subwoofer's 300W amplifier from excessive current demands, it has been designed to cut the signal to the speaker in the event of an overload. This will temporarily mute the subwoofer and stop it from working until the demand is lower. If the volume is reduced, the frequency range is altered to cut-off at a higher frequency or the passage containing the high level low frequency sound is passed, the sound output will be restored automatically.

OVER TEMPERATURE CUTOUT

To protect the amplifier from damage caused by excessive heat, there is a thermal sensor attached to the amplifier's heatsink that is set to trip the output if the internal temperature exceeds a pre-set level. If this happens, the M subwoofer will stop working until the temperature reduces to an acceptable level. The reasons this might happen are high ambient room temperature, direct sunlight, high level operation for long periods and insufficient ventilation of the amplifier control panel.

POSITIONING AND TUNING

Remember that low frequencies have a longer wave length and sound waves travel to the ear in waves. It therefore may be necessary to move your subwoofer to different positions to completely suit your requirement or taste. If you require more or less power at low frequencies, it can be affected by the proximity to an adjacent wall or boundary. Each wall or boundary will further enforce the effect of the woofer so, moving it closer or further away from a rear or side wall will change the sound effect dramatically. Corners double the effect as there are two boundaries.

The M subwoofer has been designed to match medium to small rooms, with an area of

approximately 10-20 M2 or 300-600 feet2. If higher power or larger rooms are used, it may be necessary to increase the number of M subwoofers used in a single installation.

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