Klein & Hummel O 800 Active Studio Subwoofer

O 800 Active Studio Subwoofer description:

Klein & Hummel O 800 Active Studio Subwoofer is a high-quality studio active subwoofer that matches the 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 Klein & Hummel O 800 will fit every possible combination of surround system specified today. With its three balanced inputs (Left, Center, Right), the Klein & Hummel O 800 offers all the connections necessary for operating in mono, stereo, stereo-plus-center-channel mode, Dolby Surround, Dolby Surround EX and front or rear channels with 5.1.

The center input of the Klein & Hummel O 800 can also be switched to “Sub Direct” to use the subwoofer for the effect channel (LFE) with discrete formats. For 6.1 or 7.1 installations, it would be logical to use two or, in some cases, three O 800 subwoofers to ensure that the recording is reproduced with utmost accuracy.

The balanced high-pass outputs (Left, Center, Right) are for connecting the corresponding front and rear monitors. The subwoofer can be muted whenever necessary either directly via the rear-panel bypass switch or remotely with an on/off footswitch connected to the 1/4” Bypass jack. Two controls - a continuously variable phase-adjustment control (0 - 180º) and a separate level control - permit you to set up the subwoofer at any location in the studio you wish. The 4-step low-cut filter (30, 40, 50, or 60 Hz) helps match the subwoofer to the acoustics of a given room, and also make it possible to simulate a system not as rich in bass in order to determine how well a given mix will translate to such a system.

The heart of the Klein & Hummel O 800 is the new low-frequency driver which was developed for this specific enclosure and application. The driver’s extremely long excursion of ±20 mm enables it to produce bass with remarkably low distortion. The patented Nomex / Kevlar composite cone with its high degree of self-damping and the rearvented voice coil design both contribute to the production of very high sound-pressure levels with absolutely minimal power compression. The implementation of these new technologies yields uncommonly articulate bass all the way down to 27 Hz.

The low-frequency driver odf the Klein & Hummel O 800 is in an aluminium basket designed for maximum air flow. It is also magnetically shielded, freeing you to place the subwoofer on the floor right next to a personal computer or immediately below a video monitor, without the speaker having an adverse effect on either one.

Thanks to its extremely solid construction (MDF) and its large bass-reflex port, the O 800 enclosure eliminates unwanted resonance and air noise, and produces taut, articulate bass with excellent impulse response. The finish is a high-quality scratch-resistant textured enamel that makes the cabinet an attractive, with a professional appearance. A sturdy, fine-mesh wire grille with excellent acoustic behavior serves to protect the loudspeaker cone from mechanical damage. Due to its relatively small footprint, there should be no problem finding a place for the O 800 in practically any studio.

The powerful amplification developed specifically for the O 800 has its roots in years of Klein + Hummel engineering expertise. This amplifier is one of high continuous power output, rugged reliability and superb technical performance. The O 800 includes sophisticated “True-Clipping” circuitry which, as it senses the onset of distortion, automatically limits the signal sent to the amplifier, and reliably protects both the loudspeaker and the amp from being overdriven and possibly damaged. The high-pass/low-pass crossover occurs at precisely 90 Hz using an integrated active Linkwitz-Riley frequency crossover with a slope of 24 dB/octave.

Klein & Hummel O 800 main features include:

• Low-frequency driver with aluminum basket designed for maximum air flow
• Driver constructed with rear ventilation offering higher maximum sound pressure and minimal power compression
• Exceptionally low-distortion bass reproduction due to very long excursion 40 mm (1.6 inch)
• Patented Nomex-Kevlar composite cone offering minimal distortion and maximum self-damping
• Magnetically shielded
• Resonance eliminated due to solid construction leading to Tight and articulate bass
• Linear frequency response independent from sound pressure level
• Low-compression bass reproduction from generously proportioned bass reflex port
• Integrated electronic limiter
• Precise, active, integrated main channels´crossover with 24 dB/oct. slopes
• Adaptable for bass extension and increased SPL for all K + H monitors up to the O 300 and O 300 D
• Subwoofer bypass function and optional remote control
• 4-step low-cut filter (30 Hz, 40 Hz, 50 Hz, 60 Hz)
• Continuously variable phase-adjustment control allows seamless integration with main loudspeakers
• Unlimited installation and connection options
• 3 electronically balanced inputs (left, center, right)
• Compatible with mono, stereo, Dolby Surround, and front or rear channels in a 5.1 or 6.1 system
• Center input can be switched to “Sub Direct” for independent reproduction of the LFE channel
• Electronically balanced high-pass outputs (left, center, right) connect to corresponding front or rear monitors