6
achieved by turning on the “–10 dB” and “–20 dB” switches. The
effect of these switches is combined with the effect of the rotary
level adjustment control. This results in total possible attenuation
of 42 dB, 30 dB by the system level switches and another 12 dB
by the rotary control.
Using 7000 Series Analog Subwoofers
with the 1238CF DSP Loudspeakers
Genelec recommend the use of DSP subwoofers (7200 Series)
with DSP loudspeakers. However, it is also possible to use ana-
log subwoofers. Please follow the steps below to integrate an
analog subwoofer into a system of DSP loudspeakers:
• Connect cables carrying analog audio to the 7000 Series
analogue subwoofer first.
• Connect the subwoofer outputs to the analog inputs of the
1238CF DSP loudspeakers.
• Connect the GLM Control Network to the loudspeakers.
• Make a System Setup in GLM. It will consist of only
loudspeakers as this is all the network can see, so suitable
Rapid Cabling Presets are “Stereo Pair (Analog)” and “5.0
Surround System (Analog)”.
• Run AutoCal and review and the results to check for large
dips at or above 85 Hz. Move the loudspeakers and repeat
AutoCal if there is a problem.
• Press “Finish”, then in the Main Page select “Menu | Store
Acoustic Settings to All Online Loudspeakers” and close GLM.
• For each DSP loudspeaker, turn it off, select “Stored” on the
back of each loudspeaker to enable the internal Acoustic
Settings, and then turn it on again.
• To set the phase control on the subwoofer, connect the
Center channel output of the subwoofer to the loudspeaker
to be used to align phase.
• Follow the instructions in the subwoofer user manual for
setting phase and level.
Maintenance
No user serviceable parts are to be found within the loudspeaker
enclosure. Any maintenance or repair of the loudspeaker should
only be undertaken by qualified service personnel.
Guarantee
The Genelec 1238CF is supplied with two year guarantee against
manufacturing faults or defects that might alter the performance
of the loudspeakers. Refer to supplier for full sales and guarantee
terms.
Accessories
A wide selection of accessories is available for Genelec loud-
speakers. Consult the Accessories Catalogue on www.genelec.
com or your local distributor/dealer for up-to-date information.
20
20k
50
100
200
500
1k
2k
5k
10k
Hz
Genelec Oy 1238CF (dBr) vs freq (Hz) 3 Mar 11
0°
60°
15°
30°
45°
50
100
55
60
65
70
75
80
85
90
95
d
B
r
A
Figure 3: The upper curve group shows the horizontal direc-
tivity characteristics of the 1238CF measured at 1 m. The
lower curve shows the systems power response.
20
20k
50
100
200
500
1k
2k
5k
10k
Hz
Genelec Oy 1238CF (dBr) vs freq (Hz) 3 Mar 11
80
85
90
d
B
r
A
DESKTOP LF
BASS TILT
BASS ROLL-OFF
TREBLE TILT
80
85
90
80
85
90
Figure 4: The curves above show the effect of the “bass tilt”,
“treble tilt” , “desktop” and “bass roll-off” controls on the free
field response.
