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a/d/s/ 334im Installation Manual
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912crossover installationbi-wiring / bi-ampingThe 3-series allows conventional wiring, bi-wiring, or bi-amping using the supplied passivecrossovers.While conventional wiring will provide excellent sound, bi-wiring or bi-amping will further enhancethe performance in no-compromise systems.Bi-wiring uses a separate pair of speaker wires for the high frequency and low frequency signalbetween an amplifier channel and its associated crossover network. This gives you the option ofchoosing wire which may have slightly different sonic characteristics in order to optimizeperformance of each frequency range. Also, it reduces the overall wiring resistance betweenthe crossover and amplifier, much like the use of larger gauge wire. This option provides themost benefit when the crossover network is mounted a long distance away from the amplifier.If the crossover is mounted close to the amplifier it is doubtful that there will be an appreciabledifference between bi-wiring and conventional wiring.Bi-amping is similar to bi-wiring except that it uses a separate amplifier channel for the high-frequency and low-frequency sections, instead of the single amplifier channel used in conventionaland bi-wired connections. Bi-amping provides the additional advantages of reducing amplifierdistortion and allowing the amplifier’s level controls to provide an additional level of fine-tuningnot possible with the tweeter-level switch alone. In addition, at high power levels, a bi-amplifiedconnection protects the tweeter from amplifier clipping, which is most likely to occur on channelsdriving the midrange, due to the higher energy levels of midrange signals. When bi-ampingusing the passive crossovers, the midrange low-pass filter and tweeter high-pass filter on theamplifier or external electronic crossover should be bypassed.Carefully route the wires from the 3-series tweeter and woofer to the crossover mounting location.The crossover installation location should be reasonably accessible to allow easy connection ofthe wires, tweeter level adjustment and midrange contour selection. If the crossover must bemounted in an inaccessible location make the speaker wire connections and adjustments beforefinal installation. Be sure the installation location has adequate clearance to allow the removaland replacement of the cover.Mounting the crossover requires removing the top cover of it’s housing. Grasp the top cover atthe front and back. Compress the cover slightly and lift it off the bottom of the housing.Mounting the crossover requires four holes in a rectangular pattern 2 13/16" x 4 1/4" on a flatsurface. Use the provided template as a guide for drilling the mounting holes.Align the mounting holes in the bottom half of the crossover unit with the holes you have drilledat the installation site. Pass the four #6 x 1 1/4" screws through the holes in the crossover unit,and tighten them until the assembly is firmly in place. As before, do not over-tighten; this isespecially important if the mounting surface is not perfectly flat.After all the connections and any necessary adjustments have been made snap the cover back inplace.connecting the systemTrim the speaker wire as needed. Strip about no more than 1/4" (6mm) of the insulation fromthe ends. Twist the exposed strands thoroughly to prevent any loose strands from causing ashort circuit. If possible “tin” the wire with a soldering iron. The wires attach to a removableconnector strip, in it’s attached position the screws face the bottom of the crossover.Insert the prepared wire into the appropriate location (see diagram or refer to the crossovercircuit board) in the connector strip and tighten the screws to secure the wires in place.Note the polarity marking on the crossover circuit board. |
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