Owner's Manual

Manual Addendum for Transformer Equipped Models
Product Description
 Control 126WT is a two-way loudspeakar system featuring a 6.5-inch, polymer coated
 aluminum woofer. The high frequency device is a 1-inch titanium dome tweeter. The
 tweeter housing is swivel-mounted and interfaces with a low-diffraction waveguide for
 optimal performance. The loudspeaker system is equipped with 70.7/100V multiptap
 transformer, for use with distributed line systems. The highest rated tap is rated for 30 Watts.
 Additional tap settings are 15W, and 7.5W (plus 3.7W for 70V systems only.)
 Control 128WT is a two-way loudspeakar system featuring a 8-inch, polymer coated
 aluminum woofer. The high frequency device is a 1-inch titanium dome tweeter. The
 tweeter housing is swivel-mounted and interfaces with a low-diffraction waveguide for
 optimal performance. The loudspeaker system is equipped with 70.7/100V multiptap
 transformer, for use with distributed line systems. The highest rated tap is rated for 50 Watts.
 Additional tap settings are 25W, and 12W (plus 6W for 70V systems only.)
Installation Considerations
Wiring and Tap Selection
When Wiring the Control 126WT and Control 128WT, insert signal wires into the barrier strip
mounted on the transformer plate. Connect the negative (-) input to the terminal marked "Com" for
Common Ground. Connect the positive (+) input to the terminal corresponding to the desired tap
setting. Be sure to screw down the terminal screws as snugly as possible on the wire leads to insure
a reliable connection.
Amplifier Requirements
All 70/100V distibuted line loudspeakers must be driven from a 70/100V amplifier. Be sure to allow
enough amplifier power to accomodate the number of speakers and the taps selected. To determine
amplifier power requirements, sum all of the taps connected on that amplifier line. This will give the
total system power draw. It is then advisable to add ten to twenty percent for headroom. This gives
the appropriate amplifier rating (in Watts) for the system.
High Pass Filtering
When operating a distrbuted line system, it is recommended that a High Pass Filter be used to
prevent unwanted transformer saturation. Many 70/100V amplifiers on the market today are equipped
with a built-in High Pass Filter for this reason. These built-in filters are often set around 70Hz. If a
High Pass Filter does not exist on the amplifier being used, an external filter is recommended. This
filter can be set somewhere between 30Hz and 70Hz. The higher the tap setting being used, the higher
the filter frequency should be set.