Multiple Cabinet Configurations; Parallel Wiring; Example For Parallel Wiring; Connectors - Zeck Club Série Mode D'emploi

5. Multiple cabinet
configurations
When more than one cabinet per
side is used in a PA system, it is
important to pay attention to
over the total load impedance
that your configuration exhibits
to the power amplifier. The
available output power from an
amplifier varies with the speaker
impedance and every power
amplifier has a lowest allowed
load value that has to be observed.

5.1 Parallel wiring

In a speaker setup, 'parallel
wiring' means that all
correspondent terminals are
wired together: all 'hot' (plus)
terminals are wired together, the
same goes for all 'ground' (minus)
terminals. Wiring speakers in
parallel always lowers the total
impedance. If N speakers with the
same impedance R are wired in
parallel, the total impedance R
is always R = R/N. If the speakers
tot
have different impedance R
R , and so on, you have to use the
3
following formula:
a)
1 1 1
= + +
R R R
tot 1 2
If you have only two speakers
with different impedance R1 and
R2, the formula simplifies to:
b)
R x R
1
R =
tot
R + R
1
As said before, never connect a
total speaker impedance R
amplifier that is lower than its
lowest allowed load. Disregarding
this rule leads to overheating of
the power amplifier, resulting in
its destruction or triggering of the
thermal shutoff circuitry.
12
Parallel wiring of Club series cabinets.
5.2 Example for parallel
tot
wiring
, R ,
2
1
Three cabinets are wired in
parallel:
Cabinet 1 with R
1
•
...
Cabinet 2 with R
•
R
Cabinet 3 with R
•
3
Using formula a) yields:
1/R = 1/8 + 1/8 + 1/4 = 1/2
tot
resulting in: R
1 1
=
2
R 8Ω 8Ω
tot
2
This means that the power
to an
tot
amplifier 'sees' a single total load
of 2 ohms.

6. Connectors

All Club series cabinets are
equipped with Speakon
connectors exclusively. When
connecting a Speakon plug,
always twist the entire plug
clockwise for a 1/3 turn after
Owner's Manual Club series © Zeck Audio
R
=8 ohms
1
=8 ohms
2
=4 ohms
3
= 2 ohms
tot
1 1 1
+ +
=
4Ω 2Ω
= 2 Ω
R
tot
insertion until it 'snaps' into
contact position.

7. Service

If you should experience any
problems with your Club series
cabinet, contact your local Zeck
distributor.