Samson Sub120 SUB120 Control Panel - Continued, Volume Control, Sweep Hz, Power/Protect LED

Operating the SUB120

SUB120 Control Panel - Continued

to the frequencies you want the satellites to reproduce, resulting in a much cleaner sound with more headroom.

1 Volume Control

The volume control is used to adjust the amount of level
to the SUB120 subwoofer. In addition, the volume										SPEAKER OUT
			3			5180°		6	FROM EXTERNAL AM
control will also control the output level of the high-pass				AUTO ON			PREAMP LEVEL		+	R	- -
		5	POWER 70	ON OFF 0°			INPUT OUTPUT
outputs. Therefore, if you are using the SUB120 without			PROTECT			R		R
				4
using the high-pass outputs (for example, when the					PHASE
	10		240			L		L
SUB120 is connected to an external crossover) the		10		180
volume control adjusts the low frequency output of the	VOLUME		SWEEP Hz						+	R	-
									TO PASSIVE SATELLITE
SUB120. If you are using the SUB120’s internal			SUB120 120 WATT 10" SUBWOOFER
electronic crossover to run satellite speakers, then the
volume control will adjust the overall system level.

2 Sweep Hz

The Sweep Hz control selects the upper range cutoff frequency of the SUB120’s internal electronic crossover. The SUB120’s crossover provides a 12dB per octave Linkwitz Riley filter curve. The Sweep adjusts the highest frequency that the SUB120 will reproduce, and at the same time, the high-pass outputs track the selected crossover frequency as the lower limit frequency to the satellite speakers.

3 Power/Protect LED

The POWER/PROTECT LED is a dual color LED which has three states; OFF, GREEN AND RED. The following chart shows the POWER/PROTECT LED and the different operating conditions it represents.

AUTO ON SWITCH	LED - OFF	LED - GREEN	LED - RED
ON	Not Applicable	SUB120 - ON	PROTECT
AUTO	SLEEP	SUB120 - ON	PROTECT
OFF	SUB120 - OFF	Not Applicable	Not Applicable

If the SUB120 receives a clipped signal for a long duration of time the unit will shut down and enter PROTECT mode. When the SUB120 is in Protect, you will see the POWER /PROTECT LED is lit up in red. If this happens simply turn the unit off, wait a minute and then re-power up the unit. The LED should return to a green color again indicating normal operation . At this point, readjust the level you’re sending to the SUB120 so that the signal is not clipped and the unit will operate properly.

4Auto On Switch

The AUTO ON switch is used to select the SUB120’s power operating mode. When the switch is set to OFF the unit is not operational. When the AUTO ON switch is set to the ON position, the unit is always on. To engage the SUB120’s SLEEP function, slide the AUTO ON switch to the AUTO position. In this mode, the SUB120 enters a stand-by, or "SLEEP" condition after no input signal is sensed for a period of approximately 10 minutes. The SUB120 will return to the normal operating mode as soon as it senses a signal present at the inputs.

5Phase Switch

The SUB120 can be switched for inverted phase operation by setting the PHASE SWITCH to the 180° (degree) position. Experiment with this switch to provide the best blend between the subwoofer and satellite speakers.

6The Ins and The Outs

The SUB120 features both line level and speaker level inputs and outputs so that connection with passive or active satellites is easy. The PREAMP LEVEL INPUTS simply pass the line level signal through to the PREAMP LEVEL OUTPUTS. You can use the line inputs and outputs to interface the SUB120 with active monitors. The SPEAKER LEVEL INPUTS can be connected from the speaker outputs of a power amplifier, and then the signal is sent from the SPEAKER OUTPUTS, which are high-passed, to passive satellite speakers. The following sec- tions of this manual detail the set-ups for many typical configurations with both passive and active monitors. In addition, there is a detailed cable wiring diagram on page 15.

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