The Neumann KH 870 G is an active studio subwoofer featuring two 10 inch woofers that offer a 7.1 High Definition Bass Manager compatible with all standard consumer formats from mono through to the latest 7.1 HD systems. The KH 870 G perfectly compliments Neumanns extensive range of monitors.
The Neumann KH 870 G features eight channels of analog to ensure 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 KH 870 subwoofer is designed to complement Neumanns extensive range of monitors and can be used on its own or daisy-chained to make larger systems capable of higher SPL. The KH 870 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 Neumann range. Features 7.1 Channel High Definition Bass Management compatible with all formats from mono to 7.1 Bypassable 4th order 80 Hz active crossover for maximum compatibility with consumer reproduction 0 and +10 dB LFE gain and 4-mode LFE processing: 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 Independent control of bass management for front and back channels Built-in 8 channel system volume control with remote control: NRC 1 and RS-232 Acoustical controls adapt the subwoofers response to the environment: Output level Low cut Parametric equalizer 45° step phase control with a built-in test signal Larger systems and Plane Wave Bass Arrays maybe constructed using the Sum output Remoteable electronics (REK 3 and an SC nn) for installation convenience less cabling and convenience of use Integrated electronic limiter for amplifier and driver protection Low heat dissipation amplifier Electronics can be remotely powered on with two modes of operation (0 V and 12 V trigger) Low frequency extension for main loudspeakers down to 18 Hz Low distortion magnetically shielded long-throw driver Reduced bass compression at high SPL from generously proportioned bass reflex ports Large system with 6 dB higher output than KH 810 A main loudspeaker can be mounted onto an KH 870 to make a large 4-way column system Allows main loudspeakers to play louder and with lower distortion Wooden cabinet with a tough painted finish (anthracite or silver) and high density rubber isolating feet Excellent self-damping properties leading to minimal cabinet resonances Cabinet look conforms to the family design Specifications -3 dB free field frequency response: 18 – 300 Hz + 3 dB Pass band free field frequency response: 19 – 300 Hz + 2 dB Self-generated noise level at 10 cm: < 20 dB(A) Total harmonic distortion < 0.5 at 95 dB SPL at 1 m: > 40 Hz Max. SPL In half space at 3 THD: 116.7 dB SPL Max. SPL with pink noise In half space at 1 m: 118 dB SPL Averaged between: 40 and 90 Hz Amplifier cont. (peak) output power (THD < 01 ): 320 W (200 W) Controller design: Analog active Main channel crossover frequency: 80 Hz Crossover slope: 24 dB/oct Equalization: Low cut: 30 Hz 0 -12 dB Parametric Equalizer: Bypassable Parametric Equalizer - Gain: +4 -12 dB Parametric Equalizer - Frequency: 20 120 Hz Parametric Equalizer - Q: 1 8 Time of Flight adjustment delay: 0 4.69 ms @ 80 Hz (4-step 0 45 90 135) - 180° Switch Volume Control: Hardware remote or RS-232 Calibration Tools: Internal signal generator Protection circuitry: Peak and Thermo Limiters Infrasonic filter frequency; slope: 6.5 Hz; 12 dB/oct. Remote control: On a CAT-5 Analog Inputs and Outputs Input/Output channels: 7.1 / 7+Sum Impedanz electrically balanced: XLR 13 kΩ Input sensitivity: -8 and +6 dBu Max. input level: +19 dBu (6.9 Vrms) / per channel CMRR: > 60 dB @ 15 kHz Interchannel isolation (1 kHz) level matching: -95 dB +0.1 dB Volume control range resolution: 118 dB 0.25 dB Dynamic range THD+N: 119 dB(A)
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