Shure A15BT Manual

Shure Ikke kategoriseret A15BT

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Side 1/4
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
TYPICAL APPLICATIONS
To connect the 600 line output of a preamplier, mixer, or recorder to a high-level, high-
impedance, unbalanced (Aux) input:
Connect the 600Ω output to the 33,000Ω XLR socket of the A15BT. Unbalance the XLR plug
on the A15BT and convert it to 7500Ω or 600Ω to provide the proper level and best signal-
to-noise ratio. Connect the A15BT to the Aux input. In this conguration, the A15BT “bridges”
the 600Ω line output. Refer to the table on the back page for the maximum input level to the
A15BT.
To match a high-impedance microphone output to a medium-impedance (approximately
10,000 ) input on a reel-to-reel or cassette recorder: ΩUnbalance both ends of the A15BT.
Connect the microphone output to the 33,000Ω XLR socket. Connect the 7,500Ω XLR plug to
the recorder.
For an unbalanced Aux input to accept a balanced low-impedance output: Unbalance the
33,000Ω XLR socket on the A15BT and connect it to the Aux input. Convert the XLR plug to
7500Ω or 600Ω and connect it to the balanced low-impedance device.
When a balanced 600 line output is needed on a unit with an Aux output (such as the Shure
SCM268):
Unbalance the A15BT 33,000Ω XLR socket and connect it to the Aux output. The A15BT XLR
plug offers a balanced line output at both 600Ω (at about a –20 dBm level) and 7500Ω.
SPECIFICATIONS
Frequency Response
20 to 20,000 Hz (See Figure below)
TYPICAL FREQUENCY RESPONSE

Produkt Specifikationer

Mærke: Shure
Kategori: Ikke kategoriseret
Model: A15BT

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