DYNACORD CMS 600-3 Owner's Manual download pdf (Page 29)

CMS

5 Setting up a standard PA

5.1 Cabling

The mains supply cord comes with the CMS. The quality

of all other cables lies in your responsibility. Carefully

chosen high quality cables are the best precaution to pre-

vent later problems during live operation. The following

wiring alternatives are recommended to provide trouble

free operation of your system.

LF-C

ABLES - BALANCED OR UNBALANCED?

For LF-cabling – all the low current wiring – your best

choice are balanced cables (2 signal conductors + ground

shielding) with XLR-type connectors or stereo phone

plugs. The cables should be step-on proof, shielded, and

never longer than really needed. Too many too long ca-

bles mostly lead to confusion and generate unnecessary

problems. Of course, connecting unbalanced cables with

monaural phone plugs to the CMS’s in- and outputs is

also possible and in most cases no interference will occur

because of its superb grounding managing system. Gen-

erally spoken, if you have the choice, a balanced LF-cable

is always the better solution. Today’s modern audio

equipment – like amplifiers, equalizers, FX units, mixing

consoles, and even some keyboards – offers balanced in-

and outputs. In a balanced signal path the cable screen

provides gapless connection of all metal parts, offering

efficient shielding against the induction of external noise.

The balanced cabling in conjunction with the common-

mode rejection of the CMS’s input stage effectively elim-

inates even existing artifacts of interference. All inputs of

the CMS provide balanced audio connections and high

common-mode rejection. The mixing stage outputs –

AUX, MASTER, MONITOR, etc. – are laid out in GND-

SENSING technology – a special pin assignment of the

output jacks, offering all advantages of the balanced sig-

nal transmission, but lets you also connect monaural

phone plugs without a problem. Nevertheless – as men-

tioned above – when longer cables are involved, using

stereo phone plugs and balanced cables are the better al-

ternative. The diagrams below show the pin assignments

of plugs and cables that are used with the CMS.

5.2 Setting up

1. Place the CMS in a way that allows unobstructed

operation and connect the mains cord.

2. Try to locate the best position where you want to

place the loudspeaker systems. If possible, the

woofers should be placed on the floor while the Hi

cabinets’ most favorable position is above the Lo

cabinets, on the same vertical axis. It is important

that the lower edge of the Hi cabinets is approxi-

mately at the same height level or slightly higher as

the heads of the audience. Either you use the pole

mounts to place the Hi cabinets on top of the

woofer cabinets or, in case this kind of installation

is not possible or you are not using woofer systems,

use the separate speaker pole-stands instead.

3. Do not place the left and the right speakers further

apart than necessary. The less distance there is

CMS Cable Application

MIC INPUT balanced connection of micro-

phones

All phone jack in/outputs

(except PHONES)

unbalanced external equipment with

XLR-type in/output jacks

balanced external equipment with

XLR-type in/output jacks

All phone jack in/outputs

(except PHONES)

unbalanced external equipment with

phone jack in/output jacks

balanced external equipment with

phone jack in/output jacks

2 HOT (+)

1 SHIELD

3 COLD (-)

2 HOT (+)

1 SHIELD

3 COLD (-)

cold

hot

shield

Cable connection phone to XLR-type, unbalanced

hot cold

shield

Cable connection phone to XLR-type, balanced

hot

cold

shield

Standard phone-type, balanced

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DYNACORD CMS 600-3 Owner's Manual Page 29

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