Bedienungsanleitung Fender XP 112 (Seite 4 von 8) (Englisch)

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Parallel or series are the two basic ways which multiple

speakers can be connected to a single power amplifier.

When speakers are connected in parallel, their

combined impedance decreases. For speakers wired

in series the opposite is true, their combined

impedance increases. Thus, when speakers are wired

in series, higher impedance speakers in the series draw

more power from the amplifier than do speakers in the

series with lower impedances. When speakers are

wired in parallel, the opposite is true. Higher

impedance speakers will draw less power from the

amplifier than lower impedance speakers will draw.

At Fender

, we recommend connecting multiple

speakers in parallel for several reasons. First, if one

speaker fails, the others will continue to operate. Second,

because in a series connection one speaker affects the

output of the other speakers, unpredictable frequency

response is a concern. Third, most speaker cabinets

are already wired for parallel connections making parallel

connections the most common wiring method.

Below are two charts demonstrating how to calculate

both parallel and series impedance.

Keep in mind, power and audio signal cables are the

most common sources of sound system failure. Well

made and carefully maintained cables are essential to

the reliability of the entire sound system. If long speaker

cables are required, it is important to ensure the cable‘s

gauge is sufficient to transfer all of the available

amplifier power to the speakers rather than absorbing

the power itself. As a rule of thumb, larger wires are

better as they conduct more power to the speakers

(larger wire has smaller gauge numbers).

Below are two charts listing speaker wire gauges and

recommendations for best results.

*Example - If the speaker wire length

required is between 25-50 feet (7.60-

15.25 meters) and the speaker

impedance is 8Ω, the minimum

recommended speaker wire gauge is 16.

100'-UP

(30.5 m-UP)

50'-100'

(15.25-30.5 m)

*25'-50'

(7.60-15.25 m)

10'-25'

(3.05-7.60 m)

0'-10'

(0.00-3.05 m)

SPEAKER WIRE GAUGE

SPEAKER IMPEDANCE [z]

SPEAKER WIRE LENGTH

AWG

Resistance in Ω per foot

(30.5 cm) @ 77º F (25º C)

.00651

.00409

.00258

.00162

.00102

.00064

0.83

1.32

2.10

3.32

5.27

8.38

*16 18

4Ω

*8Ω

16Ω

Cross-

Section

[mm ]

Cabinet A

Impedance

Cabinet B

Impedance

16Ω*

8Ω

8Ω*16Ω

PARALLEL IMPEDANCE

*Example- Cabinet A is 8 ohms. Cabinet B is

16 ohms . The total impedance when connected

in parallel is:

+ -

2n1

ZZZ

...

2n1

18 20* 24 32

10 12 16 24

6 8 12 20

4 6 10 18

Cabinet A

Impedance

Cabinet B

Impedance

16Ω*

8Ω

4Ω

2Ω

2Ω 4Ω*8Ω16Ω

+ -

SERIES IMPEDANCE

5.3* 8

4 5.3

...

= 5.3 ohms.

SPEAKER WIRING AND CONNECTIONS

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Fender XP 112 Seite 4

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