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 SPL.
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 SPL 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
Free field frequency response ±6 dB 17 … 600 Hz
Free field frequency response ±3 dB 18 … 300 Hz
Reproduction accuracy between 50 Hz and 100 Hz: 100%, 80%, 50% of subwoofers produced ±1.20; ±0.54; ±0.28 dB
Self-generated noise at 10 cm (with input gain set to 100 dB SPL for 0 dBu) <20 dB(A) SPL
Sine wave output with a THD < 0.5 % at 1 m in half space 95 dB SPL (>40 Hz)
Bass capability: Max. SPL in half space at 3% THD at 1m (averaged between 50 Hz and 100 Hz) 116.7 dB SPL
Max. long term SPL with pink noise at 2.3 m, in typical listening conditions (single / pair full range) 118 dB SPL
Analog input(s) 8 x XLR: analog electronically balanced
Analog input impedance >13k Ohms
Max. input level +19 dBu
Common mode rejection ratio (CMRR) > 56 dB @ 15 kHz
Crosstalk (1 kHz), level matching -95 dB; ±0.1 dB
Volume control NRC 1 hardware remote or RS-232
Volume control range; resolution 118 dB; 0.25 dB
Analog dynamic range; THD+N 119 dB(A); <0.001% (-100 dB)
Signal routing modes LFE 80+re-routing; LFE 80 Hz; LFE 120 Hz; Wide
LFE Gain 0 / +10 dB
Analog output(s) 8 x XLR; analog electronically balanced
Input gain control (sensitivity) +2 ... -12 dB
Output level control (output level in 1 m based on 0 dBu input level) 100; 114 dB SPL
Controller design Analog, active
Crossover frequency 80 Hz
Crossover slope 24 dB/oct; 4th order
Equalization: Low cut 30 Hz; 0 … -12 dB
Equalization: Parametric EQ: Gain +4 ... -12 dB
Equalization: Parametric EQ: Frequency Bypass; 20 ... 120 Hz
Equalization: Parametric EQ: Q 1 ... 8
Phase 0; 45; 90; 135 and 0/180 deg
Protection circuitry Peak and thermo limiters
Infrasonic filter: frequency; slope 6.5 Hz; 12 dB/oct.
Remote control RJ45 connector: Via NRC1 remote control (optional): volume for all channels; bass management on/off; LFE gain 0/10 dB.Via RS-232: more parameters remote controllable
Display: On; Normal Operation Red LED
Display: Limit / Clip / Errors / Protection /Boot Mute / Shut Down Mute Red LED
Display: Bass Management on Green LED
Output power woofer amplifier (THD+N with limiter deactivated: 10%) 400 W
Output power woofer amplifier (THD+N with limiter deactivated: 0.1%) 320 W
Mains Power Supply: input voltage; frequency 220-240 / 100-120 V (switchable); 50/60 Hz
Power consumption (230 V / 100 V): Idle 25 W
Power consumption (230 V / 100 V): Full output 550 W
Cabinet material Wood cabinet, aluminum electronics panel
Cabinet surface finish; color (front / back) Painted; metallic anthracite (RAL 7021) / black (RAL 9005)
Operating conditions +10° C to +40° C (+50° F to +104° F); <90% RH, non-condensing
Transport/storage conditions -25° C to +70° C (-13° F to 158° F); <90% RH; non-condensing
Woofer 2 x 265 mm (10") with magnetic shielding and protecting black metal grille
Mounting points 35 mm flange on top panel
Product dimensions (height x width x depth) 735 x 330 x 645 mm (28.9" x 13" x 25.4")
External net volume 156 liters
Product weight 47.1 kg (103 lbs 13 oz)
Cabinet weight when electronics remote located 45.5 kg (100 lbs 5 oz)
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")
Packed weight 54.3 kg (119 lbs 11 oz)
Packed cube 0.311 m³