Compact and truly uncolored
When the O 110 nearfield monitor was just on the drawing board, we set ourselves some extremely high standards and goals. Meeting these required us to take an unconventional approach to selecting materials and developing components, after which we continually refined every design detail in the pursuit of perfection.
The resulting system is a compact reference monitor with outstanding sonic qualities of the sort normally associated only with substantially larger studio loudspeakers.
For all recording, mixing, and mastering engineers working in smaller listening environments and studios, this nearfield 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 110 has therefore been equip-ped with several features that provide a listening environment as close as possible to the ideal.
Switchable 8-way room-matching EQ goes a long way to compensate for any undesirable room response resulting from placing the speakers near a wall or a corner or on a meter bridge.

Exact imaging
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 from the console (comb-filter effects). At the same time, the horizontal sweet spot is widened, giving the sound engineer greater freedom of movement. 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 palpability that is a real joy to exper-ience 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.

The newest components help produce the most outstanding sound
To achieve extremely flat frequency response, clarity, and precision, loudspeakercomponents 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 with a 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. The flux compensation of the woofer also helps reduce distortion dramatically, especially in the all-important midrange 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 is fine-tuned to work specifically with the elliptical waveguide built into the baffle.
The high and low-frequency drivers work su-perbly with each other - especially in the cross-over region - producing exactly the kind of uniform response and accurate rendition of the original sound that reveals critical details to the audio professional. Both drivers are magnetically shielded.

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. Each of the two amplifiers matches the technical requirements for perfor mance 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 prevent any thermal or physical 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. 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 accommodate a large variety of mounting adapters.

Use of high-quality drivers

	Composite sandwich woofer cone eliminates colorations
	Low-distortion bass reproduction from long excursion woofer
	Flux-compensation reduces distortion in the midrange
	Low-distortion high-output reproduction from 1" titanium fabric dome tweeter

Unconventional enclosure

	Compact homogenous enclosure made from LRIM (Low Resonance Integral Molding) minimizes resonant colorations
	Low-compression bass reproduction from generously proportioned bass reflex ports
	Acoustic centers of the loudspeaker lie on the same plane
	Non-parallel cabinet shape reduces internal standing waves
	Homogenous front baffle reduces acoustical diffraction
	Magnetically shielded and modern cabinet design
	Numerous placement options and mounting accessories
	Removable woofer grille
	Various color options available
	Active 24 dB/oct. slope crossover
	Power and overload display integrated into logo
	Controls adapt the monitor’s response to compensate for the room location
	Optional high-quality transformer-balanced floating input
	Excellent immunity from EMI interference

Acoustical
-3 dB free field frequency response	56 Hz - 24 kHz, ± 3 dB
Pass band free field frequency response	58 Hz - 20 kHz, ± 2 dB
Self generated noise level at 10 cm	< 20 dB(A)
THD < 0,5% at 1 m distance from	90 dB SPL (> 150 Hz)
Max. SPL in half space at 3% THD in 1m	107.7 db SPL
Max. SPL averaged between	100 Hz and 6 kHz
Electrical
Woofer amplifier, cont. output power (THD < 0.1%)	50 W
Woofer amplifier, peak output power	80 W
Tweeter amplifier, cont. output power (THD < 0.1%)	50 W
Tweeter amplifier, peak output power	80 W
Controller design	Analog, active
Crossover - Frequency	2.5 kHz
Crossover - Slope	24 dB/oct
Equalization - Bass	0; -2.5; -5; -7.5 dB
Equalization - Mid	0; -1.5; -3; -5 dB
Protection circuitry	Limiter: low, high
Input, analog
Impedance, electrically balanced	XLR, 14 kΩ, optional
Impedance, transformer balanced	XLR, 14 kΩ, optional
Input sensitivity	+6 dBu
Gain Control	0 ... -24 dB
CMRR	> 60 dB @ 15 kHz
Displays, indicators - power on	K + H logo "red"
Displays, indicators - limit / clip	K + H logo "blinking"
Mains	230 V, 120 V, 100 V AC
Power consumption - idle	10 W
Power consumption - full output AC; DC	70 W
Mechanical
Cabinet surface	Painted
Color standard	Anthracite (RAL 7021), silver (RAL 9006)
Special (add-on price)	On request
Baffle cover	Fixed metal grille
Drivers	Magnetically shielded
Woofer	145 mm (5.5")
Tweeter	25 mm (1")
Mounting points	2 x M8 on rear
Height x width x depth	267 x 170 x 190 mm (10.5" x 6.7" x 7.5")
Net volume internal	6.5 liters
Weight	5 kg (11 lbs)
Accessories	On a floor stand LH 31 + LH 28 LH 31 + LH 28 + LH 33 LH 48 + LH 31 + K&M stand 26790 and 26795 On a stand  LH 31 + LH 7 LH 31 + LH 8  On a lighting stand LH 29 + LH 31 On a meter bridge KG 30 On a subwoofer LH 31 + LH 37 LH 31 + LH 37 + LH 33 On a wall LH 32 KG 30 LH 31 + LH 27 LH 31 + LH 43 LH 38 + LH 27 LH 38 + LH 43 LH 31 + LH 47 + LH 45 LH 38 + LH 47 + LH 45 Off a ceiling LH 38 LH 38 + LH 27 LH 31 + LH 27 LH 31 + LH 43 LH 29 + LH 31 LH 38 + LH 43 LH 31 + LH 47 + LH 43 LH 31 + LH 47 + LH 46 LH 38 + LH 47 + LH 43 LH 38 + LH 47 + LH 46 Off a lighting or truss bar LH 38 + LH 29 Other accessories FO 110, C 15

Product	Article No.	Description
O 110	501932	Active Studio Monitor, electr. sym., 100 V, anthracite (RAL 7021)
O 110	501934	Active Studio Monitor, electr. sym., 100 V, silver (RAL 9006)
O 110	501933 *	Active Studio Monitor, electr. sym., 100 V, custom paint
O 110	501405	Active Studio Monitor, electr. sym., 120 V, anthracite (RAL 7021)
O 110	501904	Active Studio Monitor, electr. sym., 120 V, silver (RAL 9006)
O 110	501903 *	Active Studio Monitor, electr. sym., 120 V, custom paint
O 110	501404	Active Studio Monitor, electr. sym., 230 V, anthracite (RAL 7021)
O 110	501775	Active Studio Monitor, electr. sym., 230 V, silver (RAL 9006)
O 110	501774 *	Active Studio Monitor, electr. sym., 230 V, custom paint
O 110	501936	Active Studio Monitor, transformer bal., 100 V, anthracite (RAL 7021)
O 110	501938	Active Studio Monitor, transformer bal., 100 V, silver (RAL 9006)
O 110	501937 *	Active Studio Monitor, transformer bal., 100 V, custom paint
O 110	501409	Active Studio Monitor, transformer bal., 120 V, anthracite (RAL 7021)
O 110	501906	Active Studio Monitor, transformer bal., 120 V, silver (RAL 9006)
O 110	501905 *	Active Studio Monitor, transformer bal., 120 V, custom paint
O 110	501408	Active Studio Monitor, transformer bal., 230 V, anthracite (RAL 7021)
O 110	501777	Active Studio Monitor, transformer bal., 230 V, silver (RAL 9006)
O 110	501776 *	Active Studio Monitor, transformer bal., 230 V, custom paint

* Minimum order quantity: 20 cabinets