Ecler CKL SERIES - Manual (Page 6)

6
4. APPLICATIONS
The CKL110 has been designed for playback of vocal signals in fixed installations. It can be used alone
or together with the CKL SM115 (which has the same dimensions and shape) to extend the system’s
frequency response towards mid and low frequencies. Alone or together with the CKL SM115 the
system offers high efficiency levels. This makes it suitable for all applications where long throw of voice
signals is the main priority.
This type of enclosure is ideal for: stadiums, gyms, theatres, congress halls, houses of worship and
every space which requires long sound throwing and highly intelligible speech.
The CKL SM115 has been designed to extend the playback spectrum of the CKL110 towards the mid
and low frequencies. It can not be used as stand-alone. Its dimensions and shape are the same as
CKL110. It is suitable for all applications that require not only an optimal response at speech
frequencies, but also playback of musical signals.
5. CONNECTIONS
The cable between the amplifier outputs and the loudspeakers must be of good quality, enough cross-
section and as short as possible. This is very important when the distance is long and the load is low
(4-8
Ω
). We recommend a section of 2.5mm
2
or more for distances up to 10m and a section of 4 or 6 mm
2
for longer distances. An easy way to known the required cross-section, assuming a 4% loss is using
following equation:
Lenght in m
Cross-sectión en mm
2
=

Loudspeaker impedance in
Ω
Placed at the rear wall of the CKL enclosures is a connection panel which holds two SPEAKON®
sockets wired in parallel, facilitating interconnection of speaker enclosures.
SPEAKON® connectors have been adopted worldwide as the standard professional loudspeaker
connection, due to its reliability, immunity to vibration and durability.
Remember that the nominal impedance of CKL speakers is 8
Ω
. Therefore, when connecting two
enclosures in parallel, the impedance will drop to 4
Ω
, 2,66
Ω
for tree enclosures and 2
Ω
for four
enclosures. Please check the value of the minimum load impedance your amplifier can handle, as not all
amplifiers adequately operate at 2
Ω
.
Operation at 2
Ω
considerably reduces the sound quality and the system efficiency; e.g., the loss on the
loudspeaker cable reduces the Damping Factor by a 76% because of operating at 2
Ω
instead of 8
Ω
.
Almost all the amplifiers in the market base their operation at 2
Ω
on the use of destructive protections to
keep the components safe, with the penalty of sound quality. Also, and for both technological and power
supply constraints, the power gain involved in operation at 2
Ω
instead of 4
Ω
is usually very low. ECLERs
SPM and SPM CHANNEL N amplifiers are able to operate at 2
Ω
keeping its philosophy of non-destructive
protections and delivering every Watt the power supply is capable of.
ECLER, following the maximum sound quality criterion, recommend using the 2
Ω
connections only in
installations where the amplifier will operate far from its maximum power.