HK Audio CDR 210 F - Manual (Page 15)

15
B 1
1 COHEDRA ® Compact
Enclosures
1.1 The CDR 108 C Mid/High Unit
Design and Construction
The CDR 108 C Mid/High unit’s top and bottom
panels are sloped at an angle of 4.5°. Made of 19 mm,
13-ply birch plywood, the enclosure is coated with
water-repellent, black acrylic enamel. For the purpose
of curving the array, your choices of angles (or splay)
are 0°, 1.5°, 3°, 4.5°, 6°, 7.5° and 9°. The baffle board
cover consists of a metal grille; located behind it is
a compression chamber for the 8" speaker and a
CD horn equipped with an acoustical lens for the
two 1" drivers.
The CDR 108 C weighs 17.9 kg. It is 50 cm wide, 26 cm
high and 32.5 cm deep (including rigging attachments).
Two grips on the side panels facilitate transport and
set-up.
Serving to fly the mid/high units are fully integrated
rigging attachments comprising four quick-release
pins and three rigging connectors, two mounted on
the sides and one in the rear.
Electrical and Acoustical Data
The CDR 108 C enclosure is loaded with an 8" cone
chassis speaker and two 1" B&C high frequency drivers
with a front-mounted acoustical lens in a CD horn
configuration. The drivers are addressed via an
internal passive crossover with a separating frequency
of 800 hertz.
The CDR 108 C enclosure’s nominal electrical po-
wer-handling capacity is 250 watts RMS at 16 ohms
impedance. It produces a sound pressure level
of 107 dB (1W@1m), measured under half-space
conditions. Maximum SPL measured under the
same conditions at a distance of one meter is
136 dB at 10% THD.
The CDR 108 radiates at a horizontal angle of 100°.
Frequency response ranges from 88 Hz to 19 kHz
(±3 dB). The enclosure is thus able to provide
speech reinforcement for public address applicati-
ons without requiring a subwoofer.
Connections
The connector panel on the rear of the CDR 108 C
is recessed to protect the ports from harm. On this
enclosure, you’ll find two Speakon® NL 4 connec-
tors. Both ports’ four pins are wired in parallel.
Pin assignments are: pin 1+ = mid/high +,
1- = mid/high -, 2+ = sub +, 2- = sub 2-.
The CDR 108 C Enclosures’ Technical Data
Nominal power handling :
250 watts RMS, 500 watts program
Frequency range: ± 3 dB: 88 Hz – 19 kHz
SPL, 1W @ 1m*: 107 dB
SPL, max. SPL @ 1m*: 136 dB @ 10% THD**
Impedance: 16 ohms
Woofer/midrange speaker: 1x 8" with compression
chamber
High-frequency driver: 2x 1" with COHEDRA
®
Acoustic Lens
Horn: 100° CD horn
Crossover frequency: 800 Hz, 12 dB/ octave
Ports: Speakon ® NL 4 connectors
Pin assignments: 1+ = mid/ high +, 1- = mid/ high -,
2+ = sub +, 2- = sub 2-
Housing
Material: 15-mm (5/8"), 13-ply birch plywood
Coating: Black acrylic enamel
Front grille: Metal
Rigging hardware: Integrated rigging attachments
Variable splay for curving arrays: 0°, 1.5°, 3°, 4.5°,
6°, 7.5°, 9°
Weight: 17.9 kg / 39.4 lbs
Dimensions (W x H x D):
50 x 26 x 32.5 cm
19-5/8" x 10-1/4" x 12-3/4"
*) SPL measured under half-space conditions
**) measured with 4 CDR 108 Cs
Figure 1: Cohedra Compact CDR 108 C
The COHEDRA ® Compact Loudspeakers