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.

Our aim with the O 300 was to strive for nothing less than perfection in developing the best compact active reference monitor possible, with accurate, uncolored sound, superb transient response, and ideally shaped waveguides.

The O 300 is a monitor which draws upon all of KLEIN + HUMMEL’s years of experience in monitor design, which has been fine-tuned through extensive computer simulations and countless listening tests. It is indeed unique in its class, for it does in fact deliver superlative sound absent of colorations, precise bass response, picture-perfect dispersion patterns, and a stunningly real soundstage with remarkable image focus and depth.

A profusion of developments in audio and modern digital technologies are placing new demands today on active monitoring. Multi-channel productions require high-quality studio monitors and active subwoofers that can be used for both matrix-encoded formats and discrete formats as well. The O 800 matches these new demands of modern studio technology precisely. Whether as the perfect low-frequency complement to all KLEIN + HUMMEL monitor systems, or as an LFE unit (Low Frequency Effect), the O 800 will fit every possible combination of surround system specified today. Active studio monitors from KLEIN + HUMMEL have developed a reputation for their seamlessly integrated sound. With the advent of the O 800 it is now possible to assemble entire monitoring systems for different sizes of studios with a smoothly uniform frequency response that ranges from 30 Hz to 20 kHz. The extraordinary dynamics, incredible accuracy and precise stereo soundstage of our monitors provide audio engineers with the confidence they need to make sure critical judgments of multi-channel audio material.

As consumer technology advances at ever faster rates, professional technology increasingly finds itself trying to keep up. An example of this is the advent of the Blu-ray and other high definition formats that have increased the audio channel count to 7.1.

The O 810 is an answer to these new demands by offering a new 7.1 High Definition Bass Manager™. This is compatible with all standard consumer formats from mono through to the latest 7.1 HD systems. Eight channels of analog ensures flexible interconnectivity for modern studios. Four-mode LFE-channel processing guarantees compatibility across all formats and industries. Forth-order crossovers and flexible acoustical controls allow for seamless system integration. Built-in volume control and a hardware remote control allows for centralized system control independent of the source, and the electronics can be remote located to reduce cabling

The latest amplifier technology and acoustical components have been used to ensure the most accurate sound reproduction possible. Robust drivers, a rock-solid cabinet, and carefully designed ports guarantee a tight, articulate, and distortion-free low frequency reproduction, even at high replay levels. Using the sum output, Plane Wave Bass Array™ (PWBA™) techniques acoustically improves lateral consistency in the listening area. The bass extends down to 18 Hz.

The O 810 subwoofer is designed to complement Klein + Hummel’s extensive range of monitors, and can be used on its own, or daisy-chained to make larger systems capable of higher SPL. The O 810 can be used in music, broadcast, and post production studios for tracking, mixing, and mastering. The cabinet can be positioned next to a wall or flush mounted into a wall due to the front mounted port, and can be mixed freely in multichannel systems with other loudspeakers from the Klein + Hummel range.

The high-performance O 900 studio subwoofer is the ideal complement for the O 500 C studio monitor. Precise bass reproduction is achieved down to 17 Hz (– 1.5 dB). The 120 liter cabinet gives a high maximum sound pressure output with a flat frequency response. This is due to the ingenious enclosure design, as well as the use of uncompromisingly constructed drivers. The O 900 can use the analog subwoofer output of the O 500 C and an external amplifier (K+H KPA 2220 recommended).