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$7,549.00$8,999.00
503947
Neumann KH 870 G Active Subwoofer with 7.1 Bass Management
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 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 allow for centralized system control independent of the source, and the electronics can be remotely located to reduce cabling. From Mono to 3D, there are uses for the KH 870 in many different system configurations.
Features
Type: Subwoofers
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 lead to minimal cabinet resonances
- No standing wave resonances inside the cabinet
- Reduced cabinet resonances
In-house modeled 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 piston motor gives a very low harmonic distortion even at high excursions
- Reduced air noise and improved rocking modes
- Grille protects against mechanical damage
Large high-capacity flow-optimized bass reflex ports
- Fast bass transient response
- Reduced bass compression at high output levels
- Can be flush mounted
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
Remote control
- NRC 1 and SEA 1 hardware remote control
- RS-232 control possible
LFE gain
- 0 and +10 dB
Four routing modes
- LFE to the subwoofer and left/right
- LFE to subwoofer only up to 80 Hz
- LFE to subwoofer only up to 120 Hz
- LFE to the subwoofer with no filtering – for daisy-chaining subwoofers and external signal processing systems
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
- A parametric equalizer is bypassable if not needed
Bass Management controls
- Bypassable
- Independent control of bass management bypass for front and back channels
- System volume control on/off
Universal switched-mode power supply (100 … 240 V)
- One version works in any country and is robust to the poor quality mains supply
- Electronics can be remotely powered on with two modes of operation (0 V and 12 V triggers)
Ground lift
- Reduced noise in electrically noisy environments and over-comes ground loops
Sum output
- Larger systems and Plane Wave Bass Arrays™ may be constructed using the Sum output
Low heat dissipation amplifiers with large headroom and overheat limiting
- Improved transient response
- Assured reliability and safety
Separate fast-acting thermal limiter to protect the voice coil and power amplifier
- Soft clip and excursion limiters
- Increases system reliability
- Allows extraction of the maximum performance from the system
Installation flexibility
- Remote electronics (REK 3) for ease of installation, less cabling, and convenience of use
Specifications
|
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) |
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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 |
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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 |
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Crossover slope |
24 dB/oct; 4th order |
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Equalization: Low cut |
30 Hz; 0 … -12 dB |
|
Equalization: Parametric EQ: Gain |
+4 ... -12 dB |
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Equalization: Parametric EQ: Frequency |
Bypass; 20 ... 120 Hz |
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Equalization: Parametric EQ: Q |
1 ... 8 |
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Phase |
0; 45; 90; 135 and 0/180 deg |
|
Protection circuitry |
Peak and thermo limiters |
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Infrasonic filter: frequency; slope |
6.5 Hz; 12 dB/oct. |
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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 |
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Display: On; Normal Operation |
Red LED |
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Display: Limit / Clip / Errors / Protection /Boot Mute / Shut Down Mute |
Red LED |
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Display: Bass Management on |
Green LED |
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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 |
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Mains Power Supply: input voltage; frequency |
220-240 / 100-120 V (switchable); 50/60 Hz |
|
Power consumption (230 V / 100 V): Idle |
25 W |
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Power consumption (230 V / 100 V): Full output |
550 W |
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Cabinet material |
Wood cabinet, aluminum electronics panel |
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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 |
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Transport/storage conditions |
-25° C to +70° C (-13° F to 158° F); <90% RH; non-condensing |
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Woofer |
2 x 265 mm (10") with magnetic shielding and protecting black metal grille |
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Mounting points |
35 mm flange on top panel |
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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 |
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Product weight |
47.1 kg (103 lbs 13 oz) |
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Cabinet weight when electronics remote located |
45.5 kg (100 lbs 5 oz) |
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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") |
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Packed weight |
54.3 kg (119 lbs 11 oz) |
|
Packed cube |
0.311 m³ |