7.1High Definition
Studio Subwoofer
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 HD-DVD and Blu-ray
High Definition formats that has increased the audio channel count to 7.1. There are currently no monitoring
systems on the market with built-in 7.1 signal handling.
The O 870 and O 810
are an answer to the most recent evolution of
transmission formats. Klein + Hummel’s two new subwoofer packages offer 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 or an optional 8-channel, 24-bit, 192 kHz digital input card 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 of both models extends down to 18 Hz.
The O 900 and O 800 continue to be offered in addition to the new
7.1
Move up to
High Definition
O 810 and O 870 subwoofers. These two subwoofers take a slightly different approach. The O 900 is designed
to be added to the O 500 C to make a 4-way column system: the subwoofer output signal of the O 500 C is
connected to an external amplifier which can be remote located. The O 800 is a very cost effective solution
for bass managing three channels to extend the response of the front loudspeaker. Both the O 900 and O 800
can be used to only reproduce the LFE channel in multichannel systems. Alternatively a Pro M 1012 can be
used to provide flexible external bass management and system control of up to 10 audio channels and 12
loudspeakers: subwoofer signals are generated and then connected directly to the subwoofer.
All of Klein + Hummel’s subwoofers are designed to
complement Klein + Hummel’s extensive range of monitors. Subwoofers can be used on their own, or daisychained to make larger systems capable of higher SPL. They can be used in music, broadcast, and post
production studios for tracking, mixing, and mastering. They 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.
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Studio Subwoofer
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 15 Hz. 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 well-constructed drivers.
Features
M
M
M
M
M
M
Extremely powerful studio subwoofer with two extra long excursion 12“ drivers
Bass reproduction down to 15 Hz
Expressive, precise, accurate bass
High maximum output level
Bass extension and increased SPL output for the O 500 C studio monitor
Used with the subwoofer output of an O 500 C and a KPA 172 power amplifier
Frequency response in LFE-Mode
Frequency response O 500 C with O 900
OHigh900
Output
Studio Subwoofer
0.02
0.1
0.5
Max. SPL at 1 m at 1 %
1
2
5
and 3 %
THD
10 kHz
dB
dB
90
90
80
80
70
70
60
60
50
0.02
0.1
0.5
1
2
5
10 kHz
50
dB
120
110
100
90
80
20
30
40
50
70
90
Hz
Klein + Hummel KPA 172 Stereo High Performance
Amplifier. The technical superiority of this amplifier ensures that
the KPA 172 is especially suited to the O 900. The KPA 172 is
normally remotely located to avoid cooling fan noise and heat
dissipation in the control room—see www.klein-hummel.com
for details.
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