Digital Acoustics IP7-SS40 User manual

Application Note IPAMP-20120615
COMTR4070-D10 Transformer
Installation Instructions
REV June 2012
37 Sherwood Terrace, Unit 111, Lake Bluff, IL 60044 • U.S.A.
[e-mail]
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.
[e-mail]
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