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		SPEAKER SELECTORS

		MS SERIES OPTIONS

OTHER PRODUCTS IN THIS CATEGORY AT Series PT Series OPT Series SR Series GS Series INW Series

	Impedance Indicating System When purchased, this system is built-in and self-powered. It is a handy aid in choosing the best settings of the impedance matching rotary switch. A red and green light indicator on the front panel shows a constant indication of operating status. The amplifier is 4 Ohms or higher when the green lamp is lit, below 4 Ohms if the red is on. If red, simply rotate the matching switch CCW until the indicator turns green, and you are operating within safe parameters. This indicator system is useful for maintaining maximum power transfer to the speakers in actual use. If this is desired, rotate the matching control clockwise until the red lamp comes on, then back off one position at a time until the green lamp lights. You will then be matched as closely as possible to 4 Ohms at the amplifier output, which is the maximum power transfer for the speakers in operation.
				Note that this system derives its power from the left channel only, although impedance is measured on both channels. Also note that the red-green light indicating system is self powered and may flicker somewhat, especially if the driving amplifier is operating at very low power. Approximately 1 watt minimum is required to light up the system. When closely matched, the green indication may occasionally change to brief red flashes. This is due to nonlinear impedance characteristics of most speakers and need not be cause for concern. If the duration of red is longer than green, the impedance selector switch should be backed off one position or more until the green indication predominates.
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