Digital Acoustics IP7-SS40 Bedienungsanleitung

Application Note IPAMP-20120615

COMTR4070-D10 Transformer

Installation Instructions

REV June 2012

37 Sherwood Terrace, Unit 111, Lake Bluff, IL 60044 • U.S.A.

esupport@digitalacoustics.com

Page 1 of 2

IP7-SS40

Audio Transformer Installation

The optional 70V audio transformer for the

IP7-SS40 enables an IP7-SS40 Amplifier to:

•Drive one or more speakers, each with

its own transformer

•Install the speakers up to 3000’ away

from the IP7 Amplifier

•Set an individual speaker’s relative

volume using its transformer taps

Use the TalkMaster®software to adjust the

volume level of the IP7-SS40.

To install the optional 70V transformer:

•Mount the transformer next to the IP Amplifier. Optional DIN clips are provided

•Connect the Black 8Ω and the White COM leads from the transformer to the

J2-6 and J2-7 terminals (SPKR 8Ω+ and SPKR 8Ω-) on the IP7 (polarity

independent)

•Connect the Black 70V and Red COM to the speaker distribution line

IP7-SS40 70V Audio Transformer

Installation Instructions

37 Sherwood Terrace, Unit 111, Lake Bluff, IL 60044 • U.S.A.

esupport@digitalacoustics.com

Page 2 of 2

Speaker Installation Guidelines

•Each speaker must have its own 70V transformer

•Connect the speaker’s transformer to the distribution line using the 70V setting

and the appropriate wattage to set the speaker’s relative volume

•Do not mix Speakers tapped for 25V with a 70V distribution line

•Make sure to maintain the same wiring polarity between each speaker

•All Speakers must be wired in parallel (see diagram below)

•When using transformers, the total wattage available from the IP7-SS40 must be

reduced to account for transformer loss. The IP7-SS40 has 30 watts available

•When the wattage settings from each speaker on the 70v distribution line are

added together, the total cannot exceed 30 watts

•The following guidelines should be used for selecting Speaker Wire

IP7

70V 70V 70V 70V

40 Watt - 70V

Transformer

Distance

Wire Gauge

1’ - 500’

18 AWG

501’ – 1000’

16 AWG

1001’ – 2000’

14 AWG

2000’ – 3000’

12 AWG

70v distribution line using parallel wiring

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