Manual Bowers Wilkins CASA (page 6 of 7) (English, All languages)

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PVC (polyvinyl chloride) insulation for normal

use and fluoropolymer (Teflon) insulation for

plenumrated cable. We recommend the latter

for CASA™ in-wall and ceiling installations.

T h e re are no twists in the cables which are

w i red straight through. The only criterion is

that the pairs are adjacent, for example:

B rown is alongside Brown/White; Blue is

alongside Blue/White and Green is alongside

G reen/White, etc.

RJ-45 CONNECTOR PIN

ASSIGNMENT

( F i g u re 3)

The pin assignment for the RJ-45 connector

(Speaker connections):

Pin Signal C o m m e n t

1 +24/+12V 12V in Standby mode

2 –24/–12V 12V in Standby mode

3 as 1

4 as 2

5 as 1

6 as 2

7 + Audio

8 – Audio

9 0V S c re e n

LOADING CONSIDERAT I O N S

I n t e rface loading is governed by the perm i t t e d

number and type of speakers on any one

i n t e rface. The loading of speakers for one

I n t e rface is as follows:

• 1 pair of AW M ™ 7 0 s

• 2 pairs of AW M ™ 6 5 s

• 5 pairs of ACM™60s

Exceeding this loading will not render an

installation unsafe. The effect will be that

all speakers cannot be played at maximum

power output simultaneously.

C O N N E C T I O N S

( F i g u re 4)

All connections should be made with the

equipment switched off. Connect the audio

s o u rce – such as a preamplifier or surro u n d

sound processor – to the RCA type phono

sockets. Connect the RJ-45 terminated STP

C a t e g o r y 5 speaker cables to the RJ-45 sockets.

I n f r a red remote signals picked up by speakers

connected to the Interface are present at the

mono 3.5mm jack at the rear of the Interf a c e .

This socket is designed to drive third party IR

window emitters with its output of 5V. The

modulation frequency of the IR output signal will

be approximately 38kHz irrespective of the

modulating frequency of the original re m o t e

c o n t ro l .

CONNECTIONS FOR ADDING

S P E A K E R S

Additional Speakers

( F i g u re 5 & 6)

Additional speakers can be connected using

RJ-45 T-pieces or to the socket marked

‘2nd Speaker’ on the ACM™60. The total

loading should not be exceeded if simultaneous

maximum volume levels are re q u i red – see

section Loading Considerations.

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Bowers Wilkins CASA Manual

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