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5.3 Output wiring
The Model 2060 and 2150 speaker outputs on the amplifiers can accommodate wire from
20 gauge up to 12. We recommend that you do not use speaker wire smaller than 20 gauge.
You must use Class I (NEC) wiring.
The greater the distance between the amplifier and the speakers, the larger the diameter the
wire should be. This will minimize power losses across the wire and improve damping of the
speaker. Wire thickness specifications (gauges) get larger as the wire gets thinner. A 14-
gauge wire is thicker than 18-gauge wire.
Using the following chart as a guide for low-impedence operation (4Ω, 8Ω):
Wire Length
Up to 10'
10' to 15'
15' to 25'
25' to 40'
40' to 60'
Use the following as a guide for high-impedence operation (25V, 35V, 50V, 70V, 100V):
Wire Length
Up to 250'
250' to 500'
Caution: Be sure all the fine strands of the wire are twisted together and contained
within the connector. If even one strand is loose and can touch the adjacent terminal, a
short circuit may result.
5.3.1 Polarity
In order to have correct phasing between loudspeakers, you must connect them with consistent
polarity. While incorrect phasing will do no physical harm, it will diminish your bass response. It
is important that each speaker is connected to the amplifier as positive (+) to positive (+) and
negative (–) to negative (–).
5.3.2 STEREO/MONO and DUAL/MONO operation
The STEREO/MONO switch is located on the input board behind slot #2 of the standard
input module (see Figure 31). For dual-mono operation, move the STEREO/MONO switch
all the way to the left to the DUAL/MONO setting. Connect the input signal to CH 2 input
(CH 1 input becomes disabled). Connect the speakers to the speaker outputs on the
amplifier just as for normal stereo operation. Both speaker outputs will carry the signal
connected to the CH 2 input.
Note: When changing settings, always disconnect the power cord.
AM259107_00_V.pdf
Gauge of Wire
20 gauge
18 gauge
16 gauge
14 gauge
12 gauge
Gauge of Wire
18 gauge
16 gauge
November 19, 2001
5.0 Installation
27
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