Harman JBL MS SLIM Serie Manuel Du Propriétaire page 4

2. You must use both coils of a dual voice-coil woofer connected
either in series or in parallel.
3. Most amplifiers deliver exactly the same amount of power bridged
into a 4-ohm load as they do running a 2-ohm stereo load.
To design a subwoofer system that maximizes available amplifier power,
keep the following rules in mind:
1. The total system impedance of woofers in parallel can be calculated
using this formula:
1
Impedance =
1 + 1 + 1
w w w
1 2
where w is the nominal impedance of the woofer.
2. The total system impedance of voice coils (or woofers) in series can
be calculated using this formula:
Impedance = w + w + w ...
1 2 3
Tthe diagrams below show parallel and series speaker connections.
Figure 1: Parallel connection
RED
POS (+)
BLACK
NEG (–)
POS (+)
NEG (–)
FROM AMPLIFIER
...
3
Figure 2: Series connection
RED
POS (+)
BLACK
NEG (–)
POS (+)
FROM AMPLIFIER
Autogood products «130»
SUGGESTED ENCLOSURES
SEALED BOX
MODELS
Internal Volume
0.5 ft 3
MS-10SD2 SLIM
MS-10SD4 SLIM 0.5 ft 3
– The suggested enclosure volumes are related to only one speaker, including woofer and duct(s)
displaced volume.
– For enclosures with more than one speaker, it is necessary to multiply the suggested volume and
duct(s) by the quantity of speakers.
ENCLOSURES INTERNAL VOLUME
CALCULATION INSTRUCTIONS
RECTANGULAR BOX
A x B x C
Internal Volume =
NEG (–)
– A, B and C are internal dimensions.
VENTED BOX
Internal Volume Qty. Duct(s) Diameter x Length
(15l) 1 ft 3 (28l) 1 3 in x 7 in (7.5cm x 17.75cm)
(15l) 1 ft 3 (28l) 1 3 in x 7 in (7.5cm x 17.75cm)
TRAPEZOID RECTANGULAR BOX
1000
Internal Volume =
( C + D )
A x B x 2
1000
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