3.38Good Quality Connections A tight and
For permanent wiring harnesses, the barrier strip is the cheapest and best. The signal wiring can be stripped and wrapped around the terminal screws, or spade terminals can be soldered or crimped onto the ends of the signal conductors. When crimping, be sure to use the proper tool with generous pressure, and test the resultant crimp by pulling while closely inspecting. If the wire wiggles inside the crimped terminal, the contact will go bad. The spade lug, or bare wire ends, can then be tightly screwed down to the proper positions on the barrier strip. If high pressure is maintained in the crimp and the screw terminal, a
3.4 OCTAL MODULE ACCESSORIES
3.41Octal Socket Each channel has an octal socket for active and passive
3.42Input Transformer Although the audio benefits of transformerless coupling are well recognized, certain users still prefer the security of a
3.43Active Accessories In a number of special cases, the user needs
3.44Octal Module Installation Peel away the protective cover and plug in the module, observing correct alignment of the guide post in the middle. The input bypass switches for that channel must be turned off (See Section 3.5). Certain other switches may need to be set in accordance with the type of module and combination of channels desired. See the instruction sheet for each module for these details. Input to the module occurs automatically through the amplifier’s input jacks.
3.5 INPUT SWITCHES AND MONO BRIDGING
3.51Input Programming Switch An
Switches 1,2: Bypass the Octal Socket for Channel 2. Keep “on” for normal operation (i.e. when no octal accessory in used). Turn “off” when an octal accessory is plugged in (see the instructions with the octal accessory).
Switches 7,8: Same as above for Channel 1.
Switches 3,4: Connects the output from an octal accessory plugged into Channel 1 to both amplifier channels. Turn “on” to feed the octal accessory to both channels. Turn “off” for normal operation or for using separate octal accessories.
Switches 5,6: Connects the inputs of Ch. 1 and Ch. 2 in parallel (see Section 3.37). If octal accessories are used, the inputs (not the outputs) of both accessories will be combined. This may be used in place of a
3.52Mono Bridging Most stereo amplifiers have a method of combining both channels in series to give the combined power into a single load. This is a way to fully use both channels when only a single speaker is driven.
To engage the
To engage the bridged mono mode on the Model 1200, 1400, or 1700, there is a separate slide switch located below the barrier strip inputs on the rear panel. Follow the directions on the label to engage the switch in the “Bridge” position.
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