Specifications

99
Sphere Surround
+
–
+
–
front channels:
sum (omni + figure-8)
rear channels:
difference (omni – figure-8)
omni
omni
figure-8
CCM 8
figure-8
CCM 8
KFM 360
Operating principle: derivation of right (R) and right surround
(RS) signals (rough diagram)
Frequency response curves showing the effect of the proces-
sor’s built-in corrective equalization (before / after)
Technical Specifications:
KFM 360
– for 12 V ± 1 V (8 mA), 48 V ± 4 V (4 mA) phan-
tom powering
– 2 pressure transducers, built into the sphere
– diameter: 18 cm
– recording angle
+
: ca. 120°
– weight: 800 g
CCM 8L
figure-8, for technical specifications: see page 27
DSP-4 KFM 360
Analog inputs (2 × 2, XLR-5F, balanced, trans-
formerless, 48 V phantom powering, 20 kOhm):
“Analogue Mic Gain”: “+10 dB” “+20 dB”
Maximum input level: -4 dBU -14 dBU
Maximum SPL
KFM 360: 130 dB-SPL 120 dB-SPL
(The digital output level can be adjusted.)
Analog outputs: 3 × 2, XLR-5M, balanced, trans-
formerless, 100 Ohms, max. 6 dBV (2V
rms
):
REC mode: outputs I, II: unprocessed input signals,
output III: Monitor;
SURR. mode: output I: L, R; output II: C, LFE; output
III: SL, SR
Maximum analog output level: +6 dBU
Digital inputs / outputs: channel assignment just as with
the analog outputs; data format: 24 bit AES/EBU
Digital inputs: 2 × 2, XLR-3F
Digital outputs: 3 × 2, XLR-3M
synchronization / sample rate::
with internal synchronization: 44.1 / 48 / 96 kHz
with external synchronization (through master
inputs): 25 – 100 kHz
Elevation of the digital level: max. 33 dB
Dynamic range:
A/D converter: 98 dB (peak) CCIR
110 dB (rms) unweighted
D/A converter: 100 dB (peak) CCIR
113 dB (rms) unweighted
Characteristic impedance of the cable connected to
the digital outputs: 110 Ohms
Mains voltage: switchable 110 – 120 V / 220 – 240 V
Power consumption: 15 VA
Fuse: 230 V: 100 mA slow blow; 110 V: 200 mA
slow blow
Dimensions (W x H x D) 22 x 9 x 24.6 cm
about 8.7" × 3.5" × 9.7"
Weight: 2.7 kg (about 6 lbs)
of adapting to a recording situation – to the acoustic
conditions in the recording space – and this can even
be done during post-production if the unprocessed
microphone signals are recorded.
The signals from the four “virtual microphones“
comprise a type of surround reproduction which is valid
in its own terms but lacks the center channel and low-
frequency channel of the standard 5.1 approach, so
these additional facilities are provided by the digital
signal processor.
The complete KFM surround set consists of:
KFM 360 sphere microphone
1 × KG ball-and-socket joint for mounting on a stand
2 × CCM 8 L compact microphone (as a matched pair);
included: K 5 LU adapter cable (Lemo / XLR-3M), SGC
stand mount with swivel and a polished wood case
2 × SGC-KFM mounting clamp for CCM 8
DSP-4 KFM processor with mains cable and wood case
3 × AK SU/2U adapter cable (XLR-5F to 2 × XLR-3M)
for connecting the processor’s analog outputs
1 × KS 5U stereo cable for connecting the KFM 360
(5 m long; advantage: only one cable is necessary
for two channels)
1 × KLY 250/5 SU, Y-cable, 5 m long, for connecting
the two CCM 8 to the processor
Available separately:
for the KS 5 U and KLY 250/5 SU cables:
extension cables (e.g. KS 10 U, 10 m; KS 20 U, 20 m)
for the KFM 360:
KKFM wood case and HKFM suspension device.
When a KFM 360 is ordered separately, it comes with
1 × KG, 2 × SGC-KFM, 1 × AK SU/2U (XLR-5F / 2 ×
XLR-3M)
RS
R
+
–
+
–