|O 100 - Active Studio Monitor|
|Discontinued, Production from 2002 until 2004|
|Follow-up model is O 110|
Compact and truly uncolored
When the O 100 near-field monitor was just on the drawing board, we set ourselves some extremely high standards and goals. Meeting these required us to take an unconvention-al approach to selecting materials and developing components, after which we continually refined every design detail in the pursuit of perfection.
The resulting system is an extremely compact reference monitor with outstanding sonic qualities of the sort normally associated only with substantially larger studio loud-speakers.
For all recording, mixing, and mastering engineers working in smaller listening environments and studios, this near-field monitor offers a professional “tool” that achieves true impulse response and superbly flat frequency response across the entire audible range, and delivers articulate bass with a precision equal to that of many larger systems.
Taming the room
KLEIN + HUMMEL places very great importance on ensuring that the sound produced by its monitors are absolutely true to life, even under less than ideal room conditions. The O 100 has therefore been equipped with several features that provide a listening environment as close as possible to the ideal.
The high-frequency horn of the O 100 is an integrated elliptical waveguide, the exact shape of which was calculated using sophisticated computer software; this waveguide precisely shapes the coverage pattern.
Switchable 8-way room-matching EQ goes a long way to compensate for any un-desirable room response resulting from placing the speakers near room boundaries (such as a wall or corner) or on a meter bridge, table or stand.
The high-frequency horn is calculated to achieve a different angle of dispersion in the vertical plane than in the horizontal. The elliptical shape of this horn serves to narrow the horizontal dispersion, thereby substantially reducing the early reflections that would otherwise bounce off the console and mix with the direct sound (comb-filter effects). At the same time, the horizontal sweet spot is widened, giving the sound engineer greater freedom of movement in front of the mixing desk. Since console edge diffraction and surface reflections are minimized to the point where they can no longer muddy the sound, the imaging of the monitored material attains a three-dimensional pal-pability that is a real joy to experience and work with.
Use of the new material LRIM has also made it possible to align the acoustic centers of the two drivers exactly on one plane, parallel to the baffle, thereby preventing time and phase coherency problems. This allows the individual drivers to work together perfectly and produce a precisely detailed sound-stage.
The newest components help produce the most outstanding sound
To achieve extremely flat frequency response, clarity, and precision, loudspeaker components need to be of very high quality, carefully manufactured, and selected for their compatibility with one another.
The woofer chosen for this cabinet is a new type of 5½” (145 mm) cone loudspeaker that utilises a special composite cone made of several different materials. This sandwich-membrane practically eliminates harmonic distortion. As evidence, note in the cumulative spectral decay plot that there are no nose-shaped peaks to be seen, and therefore no muddled sonic image to be heard. An extremely long-excursion voice coil is responsible for the stunningly precise, low-distortion bass that you can enjoy even at high levels. In addition, the flux compensation of the woofer also helps reduce distortion dramatically, especially in the all-important mid-range region.
The high-frequency driver is equipped with a 1” (25 mm) titanium/fabric dome tweeter which combines the transparency of titanium with the low distortion of a fabric dome. This tweeter was fine-tuned to work specifically with the elliptical waveguide built into the baffle. The high and low-frequency drivers work superbly with each other-especially in
the crossover region-producing exactly the kind of uniform response and accurate rendition of the original sound that reveals critical details to the audio professional who needs to judge and adjust the mix. Both drivers are magnetically shielded for the protection of neighboring video monitors and hard drives.
High-quality amplifiers and active crossover
When it comes to designing and building high-quality power amplifiers, KLEIN + HUMMEL has fifty years of experience to draw upon. A separate amplifier powers each of the drivers in the O 100, and each of these amplifiers matches the technical requirements for performance exactly, yielding perfect phase response with the help of the precisely tuned fourth-order crossover.
The monitor is equipped with effective protection circuitry designed to allow impulse peaks through. But if the voice coil is threatened by thermal overload or the power amplifiers run the risk of overheating, then this circuitry will respond to prevent damage. The input is electronically balanced and can optionally be upgraded to transformer-balanced and floating with a very high quality transformer.
Elegant enclosure design
The monitor enclosure, made of a dense low-resonance composite material called LRIM, sports an attractive, contemporary look. Since the housing is formed completely from one mould, it was possible to make it quite compact. The non-parallel internal walls of the cabinet prevent standing waves from forming inside the cabinet and thereby help eliminate resonant coloration.
Threaded bushings at the back of the cabinet accommodate a large variety of mounting adapters.
|Free field frequency response
||60 Hz - 20 kHz, ± 2 dB|
|Self generated noise level at 10 cm
|THD < 0,5% at 1 m distance from
||150 Hz @ 90 dB/SPL|
|Max. SPL in half space at 3% THD in 1m
||107.7 db/SPL |
|Max. SPL averaged between
||100 Hz and 6 kHz|
|Woofer amplifier, cont. output power (THD < 0.1%)
|Woofer amplifier, peak output power
|Tweeter amplifier, cont. output power (THD < 0.1%)
|Tweeter amplifier, peak output power
|Crossover - Frequency
|Crossover - Slope
|Equalization - Bass
||0; -2.5; -5; -7.5 dB|
|Equalization - Mid
||0; -1; -2; -4 dB|
||Limiter: low, high|
|Impedance, electr. symm.
||10 kOhm, optional|
|Impedance, bal. floating
||10 kOhm, optional|
||> 50 dB @ 15 kHz|
|Displays, indicators - power on
||K + H logo "red"|
|Displays, indicators - limit / clip
||K + H logo "blinking"|
||230 V AC; 120 V AC available|
|Power consumption - idle
|Power consumption - full output AC; DC
||Anthracite (RAL 7021), white (RAL 9010)|
|Special (add-on price)
Metal grille, removable
||2 x M8 on rear|
|Height x width x depth
||10.5 x 6.7 x 7.5"|
|Net volume internal
||KG 30 / LH 32 / C 15|
LH 31 + LH 28 / LH29,
LH 31 + LH 7/ LH 8 / LH 27
||Active Studio Monitor, electr. sym., anthracite (RAL 7021)|
||Active Studio Monitor, electr. sym., 120 V, anthracite (RAL 7021)|
||Active Studio Monitor, transformer bal., anthracite (RAL 7021)|
||Active Studio Monitor, transformer bal., 120 V, anthracite (RAL 7021)|
||Active Studio Monitor, electr. sym., white (RAL 9010)|
||Active Studio Monitor, transformer bal., white (RAL 9010)|
O 100 Frequeny Response
O 100 THD at 95 dB/SPL at 1m
O 100 Group Delay
O 100 Max. SPL at 1m
at 1% THD (blue) and 3% THD (red)
O 100 Room Compensation - EQ: Mid, Bass
O 100 Cumulative Spectral Decay
O 100 Horizontal Directivity
O 100 Vertical Directivity
|Further Images |
Klein+Hummel O 100 Front View
» Download (1.7 MB)
Klein+Hummel O 100 Front View
» Download (2.9 MB)
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