Section 3: Venue Installation
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3-5
Table 3-1 Extension Speaker Worksheet
Sheet 1
SELECTING SPEAKER POWER
General Instructions
This section will lead you through the power and speaker selection process. This process consists of four
major steps and several smaller steps. The major steps are:
1. Identifying the extension speakers and computing the extension speaker power.
2. Making the external speaker connections.
3. Performing an amplifier overload check per table 3-2B.
Selection Procedures
1. Use a pencil (you may want to revise your figures) to fill in the work sheet on the following pages:
Extension speakers are available in these general categories: General purpose speakers (4 and 8 ohm
speakers) and 70 V speakers.
Use this worksheet to help you calculate the amount of power consumed by the extension speakers.
Use this worksheet as a guide to help you select which power tap to use for each type of external speaker
you are using. An extension speaker RMS power rating should be at least 10% higher than the power it will
consume at max phonograph volume.
Extension speakers connected to E1 - E7
Place the quantity of speakers in the blank under QTY and multiply the quantity times the power
consumption (show stereo speakers as 2 speakers). Place your results in the blank under TOTAL.
When RMS power to speaker
at max phonograph volume is
250 watts
125 watts
62.5 watts
31.25 watts
Then recommended RMS power
rating of speaker is
300 watts
150 watts
75 watts
40 watts
QTY
Total
Two 8 ohm speakers in series:
____at 62.5 watts per series =
____watts
(31.25 watts to each speaker)
Two 4 ohm speakers in series:
____at 125 watts per series =
____watts
(62.5 watts to each speaker)
8 ohm speakers:
____at 125 watts each =
____watts
4 ohm speakers:
____at 250 watts each =
____watts
Summary of Contents for StarLink DLW-1
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