Shure A15BT Personal Lift User Manual


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Printed in U.S.A.
©2009 Shure Incorporated
27C1916 (Rev. 5)
The A15BT matches, bridges, or isolates balanced and unbalanced devices of different
impedances and levels.
Impedance: XLR socket (Female), 33,000Ω
XLR plug (Male), 7500Ω, easily converted to 600Ω.
Unbalancing: Either end can be unbalanced by connecting pins 1 and 3.
Voltage difference: From 33,000Ω to 7500Ω, 6.4 dB
From 33,000Ω to 600Ω, 17.4 dB.
MEDIUM-IMPEDANCE SELECTION
As supplied, the A15BT XLR plug is at 7500Ω. To convert to 600Ω, refer to Figure 1 and
proceed as follows:
Remove the three-pin plug element by turning the screw counterclock-wise and 1.
withdrawing the element from the case.
Remove the GREEN lead pin jack from pin 3, and insulate the jack and bare 2.
lead.
Remove the tape from the pin jack on the WHITE lead and push the jack rmly 3.
onto pin 3.
Replace the plug element in the housing and fasten the screw rmly in place 4.
(turn clockwise).
Model A15BT User Guide
BRIDGING TRANSFORMER
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