Subwoofer with 7.1 Bass Management

KH 870 G

7.1 analog bass managed subwoofer

7.1 High Definition Bass Management (remote)
Very deep bass response (18 Hz)
High maximum S.P.L (116.7 dB, 400 W)

MORE POWER SAME PRECISION.

The KH 870 is an answer to the demands by offering a 7.1 High Definition Bass Manager™. The flexibility of this bypassable 7.1 bass manager means it is also 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. From Mono to 3D, there are uses for the KH 870 in many different system configurations.

IMPROVING LATERAL CONSISTENCY

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.

FLEXIBLE MOUNTING OPTIONS

The KH 870 subwoofer is designed to complement Neumann's extensive range of monitors, and can be used on its own, or daisy-chained to make larger systems capable of higher S.P.L. The KH 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 Neumann's range.

APPLICATIONS

Bass extension for loudspeakers down to 18 Hz
Increasing the maximum S.P.L of loudspeakers by up to 8 dB
Decreasing harmonic and intermodulation distortion of loudspeakers
Reproducing the LFE channel
Reproducing the “Sub” signal of a bass managed multichannel source
Making a Plane Wave Bass Array™ system
Working as an extension for KH line subwoofer systems

(1)
Computer mechanically modeled cabinet design using Low resonance Integral Molding™ (LRIM™) materials

Wooden cabinet with a tough painted finish and high density rubber isolating feet
Excellent self-damping properties leading to minimal cabinet resonances
No standing wave resonances inside cabinet
Reduced cabinet resonances

(2)
In-house modelled long-throw composite sandwich cone bass driver with Extremely Linear Force Factor™ (ELFF™), magnetic shielding, flow optimized die cast basket and robust built-in grille

Damping of break up modes brings low distortion at high sound levels
Linear pistonic motor gives a very low harmonic distortion even at high excursions
Reduced air noise and improved rocking modes
Grille protects against mechanical damage

(3)
Large high-capacity flow-optimized bass reflex ports

Fast bass transient response
Reduced bass compression at high output levels
Can be flush mounted

(4)
XLR electronically balanced analogue inputs and outputs

Standard interfacing to professional equipment
Daisy chain output for subwoofer arrays

7.1 High Definition Bass Management

Compatible with all systems from mono to 3D
Bypassable 4th order 80 Hz active crossover for maximum compatibility with consumer reproduction systems
Allows main loudspeakers to play louder and with lower distortion

(5)
Remote control

NRC 1 and SEA 1 hardware remote control
RS-232 control possible

(6)
LFE gain

0 and +10 dB

Four routing modes

LFE to subwoofer and left/right
LFE to subwoofer only up to 80 Hz
LFE to subwoofer only up to 120 Hz
LFE to subwoofer with no filtering – for daisy chaining subwoofers and external signal processing systems

(7)
Wide range input gain and output level controls

Easier interfacing with signal sources

8-position phase control (with built in test tone), continuous low cut control and parametric equalizer

More control in diverse acoustical environments
Parametric equalizer is bypassable if not needed

(8)
Bass Management controls

Bypassable
Independent control of bass management bypass for front and back channels
System volume control on/off

(9)
Universal switched-mode power supply (100 … 240 V)

One version works in any country and robust to poor quality mains supply
Electronics can be remotely powered on with two modes of operation (0 V and 12 V trigger)

(10)
Ground lift

Reduced noise in electrically noisy environments and over-comes ground loops

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