KLING & FREITAG K&F CA 1515-9 - SP - Manual (Page 11)

User’s Manual ‘SP’ Models based upon the CA Series
KLING & FREITAG GMBH ©2003 - 2014 Version 7.1, 09.09.2014 Page 11 of 52
4) GAIN CONTROL (± 6 dB)
a) The gain control can be used to adjust the input level of the amplifier module
by ± 6dB. It serves to balance the volume levels of the various systems. In or-
der to avoid overloading the input circuit or mixer’s output circuit, it should
normally be set in the case of K&F full-range systems at 0 dB (centre notch
setting).
b) When operating with a K&F System Controller, set the input level for the am-
plifier module on the controller. The gain control on the SP speaker should be
set at 0 dB (centre notch setting). One exception to this rule is a cluster ar-
rangement, in which the inner speakers should be set at a lower level than
the outer ones. In this case the level of the gain control on the inner SP
speakers can be adjusted downwards accordingly.
When operating with additional bass systems it is very important that the respec-
tive volume levels between the top speakers and the bass systems are correctly
balanced. To this end the sound engineer should check the volume levels during
the set-up and adjust them accordingly. When setting up a system without K&F
System Controller this adjustment should be carried out using the gain control of
the SP subwoofer; in the case of a system with K&F System Controller set the gain
on the Controller.
Normally we recommend the following settings*
gain control subwoofer / gain on controller
1 x top / 1 x subwoofer + 6 dB
1 x top / 2 x subwoofer + 0 dB
1 x top / 1 x SW 215 E - SP + 0 dB
* These details may vary due to different room geometries.
The position of a bass speaker is also crucial for its actual sound level. A bass speak-
er, which is on the floor, can be a few decibels louder than a flown bass system be-
cause of the floor reflections. Because of this, a sound engineer must always fine-
tune the system using the corresponding gain controls.
5) FILTERS ON / OFF (High-Pass / Low-Pass / Equalizer)
This switch turns the filter in the SP module on (‘ON’), or off (‘OFF’).
a) The switch should always be in the ‘ON’ position when the speakers are being
driven without K&F System Controller.
b) The switch should always be in the ‘OFF’ position when the speakers are being
driven with K&F System Controller.
The filters consist of:
− high-pass: protects the speakers against mechanical stress due to frequen-
cies outside the speaker's frequency range (protection against subsonic
frequencies)
− EQ: filter for basic equalisation, optimising the frequency response of the
speaker systems.
Furthermore the SP filter module has a phase alignment, which prevents loss of
certain frequencies due to phase shift between mid-high and bass systems.
Thus the combination of all available K&F mid-high SP systems with all K&F
bass SP systems is possible, and 100% phase compatibility with all K&F speak-
ers operating in conjunction with a K&F System Controller in the ‘2-way active’
mode is guaranteed.