Neumann KH 870 Active 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 the Blu-ray and other high definition formats that have increased the audio channel count to 7.1. 

The KH 870 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 latest7.1 HD systems. Eight channels of analog inputs 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 KH 870 subwoofer is designed to complement our extensive range of monitors, and can be used on its own, or daisy-chained to make larger systems capable of higher SPL. 

Technical Data

Acoustics −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 SPLat 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 Electronics Amplifier, cont. (peak) output power(THD < 0,1 %) 320 W (400 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), <0. 001% (−100 dB) LFE Modes 80+re-routing, 80, 120, wide LFE Gain 0 / +10 dB Gain Control +2 … −12 dB Displays and indicators: power on Red LED - limit/clip Red LED “Flashing” - bass management active Green LED Mains power 220 - 240 / 100 - 120 V AC (switchable) Power consumption - Idle 25 W Power consumption - Full output 550 W Mechanics Cabinet surface finish Painted Color: standard Anthracite (RAL 7021) Baffle cover Included metal grille Drivers Magnetically shielded Woofer 2 x 265 mm (10") Product dimensions  (height x width x depth), mm (inches)  735 x 330 x 645 mm, (28.9" x 13" x 25.4") Packed dimensions  (height x width x depth), mm (inches) 860 x 470 x 770 mm, (33 7/8" x 18 1/2" x 30 3/8") Internal net volume 86 l External volume 156 l Weight 47,1 kg (103.6 lbs) Delivery includes 1x KH 870  3x Power cables (Euro, UK, USA)  1x Operating manual  1x Supplement "Getting Started Quickly"