KLING & FREITAG K&F Line 212-9 - SP - Manual (Page 7)

User’s Manual LINE 212-6 - SP / LINE 212-9 - SP
KLING & FREITAG GMBH ©2003 - 2014 Version 5.0, 09.09.2014 Page 7 of 44
2. Introduction SP Loudspeakers
‘SP’ denotes the ‘Self Powered’ product line 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 combina-
ble 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 a K&F System Controller CD 44,
CD 24 (discontinued) and C2 (discontinued) are also possible, which is appropriate for
many applications.
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