Active Near-Field Monitor
NEW
O
300
Active Near-Field Monitor
Near-Field Monitors
Near-Field
Technical Data
Free field frequency response 1
Free field frequency response 2
Self-generated noise level at 10 cm
THD < 0.5 % at 1 m distance
Nominal power capacity
Max. SPL
In half space at 3 % THD
Averaged between
O 300
40 Hz – 20 kHz, ± 2 dB
35 Hz – 24 kHz, ± 3 dB
< 20 dB(A)
100 Hz @ 95 dB/SPL
–
112.8 dB/SPL
100 Hz and 6 kHz
Electronics
Woofer amplifier, continuous output power*
Woofer amplifier, peak output power*
Midrange amplifier, continuous output power*
Midrange amplifier, peak output power*
Tweeter amplifier, continuous output power*
Tweeter amplifier, peak output power*
Controller design
Crossover
Frequency
Slope
Equalization: Low cut
Bass
Mid
Treble
Phase adjustment delay
Protection circuitry
Subsonic filter frequency; slope
Input, analog
Impedance, electronic symmetry
Input sensitivity
Attenuator
CMRR
Output, analog
Displays, indicators: power on
limit/clip
display
Mains
Power consumption
Idle
Full output AC; DC
150 W
250 W
65 W
75 W
65 W
110 W
Analog, active
650 Hz/3.3 kHz
24 dB/oct.
–
0; – 2.5; – 5; – 7.5 dB
1,5; 0; – 1.5; – 3; dB
2; 1; 0; – 1; dB
–
Limiter: low, mid, high
30 Hz; 6 dB/oct.
XLR, 14 kO
+ 6 dBu
0 – 28 dB
> 60 dB @ 15 kHz
–
K + H logo “red”
K + H logo “blinking”
–
230 V AC; 120 V AC available
18 VA
240 VA
Mechanical Specs
In developing the O 300
the goal was to achieve the most accurate, uncolored
sound, combined with ideally shaped waveguides, in a compact
size. Complex computer simulations and extensive listening
tests were conducted. The results are unheard of: this 3-way
monitor produces a neutral, equalized sound stage which
is unparalleled in its class. Precise bass response, perfect
dispersion patterns, and a stunningly real sound stage with
remarkable image focus and depth leave nothing to be desired.
Now available without the digital components of the successful
O 300 D.
Height x width x depth
Net volume internal
Weight
Drivers
Woofer
Midrange
Tweeter
Mounting points
10 x 15.1 x 11.4"
18.3 liters
30.8 lb
Magnetically shielded
8"
3"
1"
2 x M8 on sides
Rear panel bracket
Mounting hardware
LH 25 + LH 28/LH 29
–
–
Cabinet surface
Color standard
optional
Special (add-on price)
Baffle cover optional
Painted
Anthracite
silver finish or white
On request
Metal grille, removable
Elliptical waveguide for very wide horizontal
and narrow vertical dispersion patterns
Very compact layout
of the 3 drivers
Minimal-distortion
input circuit
Room compensation
EQ bass, mid, treble
optional silver finish
O 300 Active Studio Monitor
Sophisticated 3-way system
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The most important frequency spectrum lies in the ideal broadcast zone of the loudspeaker
Extremely low-distortion reproduction
Exceptionally neutral sound stage from 40 Hz to 20 kHz
No standing waves in enclosure
No partial coloration
No comb-filter effect
Unconventional enclosure concept
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Very compact enclosure constructed of advanced materials
Avoidance of resonance via combination of MDF and LRIM (Low Resonance Integral Molding)
Very accurate bass reproduction via sealed enclosure
Precision centers of loudspeakers are on one plane
Homogenous baffle with no diffraction or fastening elements and with excellent self-damping properties
Extremely wide effective listening area for main monitor via horizontal installation
Modern design
Numerous installation possibilities
Optional baffle cover/grill
Magnetically shielded
Functional waveguide
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Dispersion is horizontally wide
쑺 Increased freedom of movement at mixing console
쑺 Vertically narrow sound dispersion reducing early reflections off console surface
Perfect dispersion pattern
Advanced electronics
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Integrated electronic limiter for each driver
Active crossover equalizer with 24 dB/oct.
AF-input equipped with minimal distortion input circuit
Power and overload/limiter-display integrated into Klein + Hummel logo
3 x 4 room-matching circuitry for different placement options
Frequency response
THD at 95 dB/SPL in 1 m
total
k2
k3
dB
100
dB
– 10
– 20
90
– 30
– 40
80
– 50
– 60
70
– 70
– 80
60
– 90
0.05
0.2
0.5
1
2
5
10 kHz
0.05
Group delay
0.2
0.5
1
Max. SPL in 1 m at 1 %
2
5 kHz
and 3 %
THD
ms
dB
110
20
100
0
90
– 20
80
70
0.2
0.5
1
2
5 10 kHz
0.05
Room compensation EQ: bass, mid, treble
0.2
0.5
1
2
5 kHz
Cumulative spectral decay
dB
0
–5
– 10
– 15
– 20
– 25
0,0
90
80
70
60
0.05
0.2
0.5 1
2
5
10 kHz
50
Horizontal directivity
125
250
500
1,000
2,000
4,000
2.3 ms
+5
0
–5
– 10
– 15
– 20
– 25
4.5 ms
6.8 ms
9.1 ms
100 Hz
10 kHz
Vertical directivity
8,000
16,000
90
90
60
60
30
30
0 degree
0 degree
– 30
– 30
– 60
– 60
– 90
125
250
500
f[Hz]
0 to 3
1,000 Hz
1,000
2,000
4,000
8,000
16,000
– 90
f[Hz]
–3 to 0
– 6 to – 3
– 9 to – 6
– 12 to – 9
Decrease of SPL (dB)
– 15 to – 12
– 18 to – 15
– 21 to – 18
K + H Vertriebs- und Entwicklungsgesellschaft mbH
Auf dem Kessellande 4 a, 30900 Wedemark, Germany
Phone: + 49 (51 30) 58 48 - 0, Fax: + 49 (51 30) 58 48 - 11
www.klein-hummel.com
Copyright © 2006 513733 09/06 K + H Vertriebs- und Entwicklungsgesellschaft mbH. All rights reserved. Subject to change without notice. Printed in Germany
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