Adjusting the X-OVER and Bass

LEVEL

MIN MAX

(Please note: If you intend to use the amplifier in the Tri-mode configuration, it is necessary to set the crossover control to the “FLAT” setting in order to receive full range output)

The “EL” amplifiers are equipped with a built-in variable crossover network allowing you to select the crossover type (i.e. Low-Pass or Hi-Pass) and the desired crossover point. For example if you wish to drive a pair of subwoofers, you can select the “Low Pass” setting on the amplifier to filter out high frequencies. This will send only low frequencies to your subwoofers (see example settings below). The crossover point should be determined by the speakers operating range. Please refer to speaker manufactures recommended crossover point.

Select the crossover type on the	You can add up to 12dB bass boost by
amplifiers side panel.	increasing the Bass Boost control.
(Low-pass is selected in this example for subwoofers)

	X-OVER	BASS
FILTER	X-OVER	BOOST
FILTER
LOW	HI
FLAT	60Hz 400Hz	0dB 12dB

Select the crossover point

for your speakers.

FINE TUNE THE SYSTEM

Fine tune the amplifier’s input sensitivity.

The gain sensitivity control for the “EL” amplifier is located on the side panel. This gain control has been included to allow adjustment to properly match the output of the radio. This is one of the most

misunderstood adjustments. By rotating the control in the clockwise direction, the amplifier‘s input will become more sensitive and the music will play louder.

This is not a volume control and you will not get more power out of the amplifier in the maximum position! It may seem to deliver more output, but actually the system is only playing louder faster as you turn the volume control on the radio. Ideally, to properly level match the system the goal is to achieve maximum output from the amplifier without distortion at about 3/4 of the volume control.

To determine if the amplifier’s gain is set properly, turn the system on and slowly increase the volume control. You should be able to use about 3/4 volume before the system gets loud but not distorting. It is very important when making these adjustments that you do not over drive the speakers (at point of distortion) this will cause permanent damage to the speakers. If you are unable to achieve 3/4 volume before distortion you will need to adjust gain control (in this case you would reduce the gain). The gain controls should be adjusted very slowly. It may help to have another person to assist you by adjusting the gain controls while you listen for distortion.