Shure A15BT Handleiding

Shure Niet gecategoriseerd A15BT

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Pagina 1/4

Printed in U.S.A.

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

Impedance

XLR Pin Connector (M): 7500Ω or 600Ω

XLR Socket Connector (F): 33,000Ω

Voltage Ratio 7500 Ω 600 Ω

Medium-impedance to

high-impedance: +6.4 dB +17.4 dB

High-impedance to

medium-impedance: –6.4 dB –17.4 dB

Driving Source Winding Being Maximum

Impedance (ohms) Driven (ohms) Level (Volts)

600 600 0.5

600 7,500 2.5

600 33,000 6.0

7,500 7,500 1.5

7,500 33,000 5.0

33,000 33,000 5.0

Case

Full magnetic shield, steel with gray enamel nish

Dimensions

19 mm (3/4 in.) diameter; 89 mm (3 1/2 in.) long

33K Ω

Ω

2600

Ω

7500

FEMALE

INSERT

MALE

INSERT

TRANSFORMER

BLACK

WHITE

BLACK

GREENRED

BLUE

GROUND

TERMINAL

SNAP

RING

GROUND

TERMINAL

YELLOW

CONNECTOR WIRING DIAGRAM

Product specificaties

Merk:	Shure
Categorie:	Niet gecategoriseerd
Model:	A15BT
Kleur van het product:	Zwart
Breedte:	19 mm
Hoogte:	89 mm
Aantal:	1
Impedantie:	- Ohm
Frequentiebereik:	- GHz
Aansluiting(en):	XLR Pin Connector (M), XLR Pin Connector (F)
Output impedance:	600, 7500, 33000 Ohm