Bose Car Amplifier 1800-VI User Manual
12
English
4.0 Installation
4.8 Output wiring
Use heavy gauge wire for speaker connections. 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. So a 14-gauge wire is thicker
than 18-gauge wire. Use the following chart as a guide.
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. So a 14-gauge wire is thicker
than 18-gauge wire. Use the following chart as a guide.
Wire Length
Gauge of Wire
Up to 15'
18 gauge
15' to 25'
16 gauge
25' to 40'
14 gauge
40' to 60'
12 gauge
60' to 100'
10 gauge
100' to 150'
8 gauge
150' to 250'
6 gauge
This will keep the resistance of the speaker wire to less than 5% of 4 ohms and the
transmission loss to less than 0.5 dB.
transmission loss to less than 0.5 dB.
The multi-way binding posts can accept spade lug, bare wire, or banana connections. 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.
You must use Class I (NEC) wiring.
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.
You must use Class I (NEC) wiring.
4.8.1 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.
The key is to make sure both speakers are connected to the speaker terminals the same way.
polarity. While incorrect phasing will do no physical harm, it will diminish your bass response.
The key is to make sure both speakers are connected to the speaker terminals the same way.
Connect – at the speaker outputs to – on the back of the speaker, and + at the speaker
outputs to + on the back of the speaker.
outputs to + on the back of the speaker.
4.8.2 Dual mono
The stereo/mono switch is located on the input board behind slot #2 of the standard input
module (or, on the AMC-1 module, to the left along the rear edge of the board). For dual-
mono operation, move the STEREO/MONO switch all the way to the left to the DUAL
setting (or, on the AMC-1 module, move that switch all the way to the right). 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.
module (or, on the AMC-1 module, to the left along the rear edge of the board). For dual-
mono operation, move the STEREO/MONO switch all the way to the left to the DUAL
setting (or, on the AMC-1 module, move that switch all the way to the right). 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.