User’s Manual
LINE 212-6 - SP / LINE 212-9 - SP
KLING & FREITAG GMBH ©2003 - 2006
Version 4.1, 19.06.2006
Page 7 of 45
2.
Introduction SP Loudspeakers
‘SP’ denotes ‘Self Powered’ series in the K&F range of loudspeakers. Based on selected
K&F speaker systems, the ‘SP’ models are equipped with state-of-the-art integrated
driver circuits and Class D power amplifier technology. The extremely lightweight
system electronics replace ponderous racks, power amplifiers, controllers, and speaker
cables.
Aside from the integrated power amplifier and input modules with controller func-
tions, the full-range systems possess a passive crossover so that the advantageous
features provided by the K&F passive technology (all-pass filter, protection circuits)
remain usable. The frequency separation for the subwoofers is controlled by an active
110 Hz low-pass filter.
Integrated phase optimisation allows for all systems in the ‘SP Series’ to be combin-
able with one another. With this, the ‘SP’ speakers, when the filter section is switched
off, have a completely comparable sound to the corresponding versions without inte-
grated power amplifier technology. Operations using the K&F C2 Controller are also
possible, which is, for example, appropriate for combined applications with equivalent
passive systems or for the use of C2 presets (clustering = Top Low Cut, Bass-Boost
etc.).
Operating the ‘SP Series’ is incredibly easy: The full-range systems reproduce the com-
plete frequency spectrum. If necessary, the ‘SP’ subwoofers in parallel operations can
provide an additional bass boost.
The Input Module
−
Line signal input
−
Limiter section (feed-forward RMS-limiter and peak limiter in feed-back design).
−
High pass filter, 45 Hz tops, and 32 Hz subwoofers
−
Low pass filter 110 Hz (only subwoofer systems)
−
System specific, switchable frequency deemphasis (‘FILTERS ON/ OFF’) controllable
by a covered switch on the connecting terminal
−
Phase correction
−
Level adjustment (countersunk level control on the connecting terminal)
The Amplifier Module
−
1 x, or 2 x 1 kW Class D state-of-the-art power amplifier
−
Minimal dimensions (speaker dimensions of the models without the ‘SP’ module are
retained)
−
Low weight (weight increase of 2.5 / 4 kg as compared to systems without the ‘SP’
module; and with the Line 212 --- SP, the weight even stays identical)
−
High efficiency enables convection cooling, because of which bothersome fans are
unnecessary
−
High fidelity (even in high frequency range) and a large power bandwidth resulting
from impedance optimisation
