The KH 870 Dual 10″ Active Studio Subwoofer from Neumann is a professional-grade subwoofer, ideal for tracking, mixing, and mastering applications in music, broadcast, and post production facilities. The sub has a 7.1 HD Bass Manager that is compatible with all standard consumer formats from mono all the way up to more recent 7.1 high-def systems. The subwoofer supports 8 channels of analog audio via XLR connectors for wide compatibility and flexibility in modern studios. You can also add an optional 24-bit/192kHz digital input card to add support for 8 digital channels.
The sub has a sturdy cabinet with a pair of 10″ front-firing woofers. Front-panel bass ports extend low frequency response while reducing compression and turbulence. Because the ports are on the front, you can also position the sub next to a wall or flush mounted into a wall without reducing performance. The sub can be used on its own, daisy-chained with other subwoofers to make a larger system, or used with Neumann full-range monitors for a full multichannel system.
The subwoofer has an integrated 8-channel system volume control and has an RS-232 port for use with an optional remote control. The electronics can be remotely turned on with 2 modes of operation. Using a remote allows centralized system control regardless of the source, and the electronics can be remotely located to reduce cabling. Other features include a bypassable 4th order 80Hz active crossover and 4-mode LFE processing, as well as an electronic limiter to protect the sub’s amplifiers and drivers.
- 7.1 Channel HD Bass Management
- Dual 10″ Front-Firing Drivers
- 4-Mode LFE Processing
- 4th Order Crossover
- 8-Channel System Volume Control
- Optional 24-bit/192kHz Digital Input
- Daisy-Chain Capable
- RS-232 Remote Port
- Integrated Electronic Limiter
Neumann KH 870 Specs
| Monitor Type | Active Subwoofer |
| Enclosure | Bass-Reflex, Shielded |
| Power Rating | 320 W RMS 400 W Peak |
| Drivers | LF Driver: 2 x 10″ / 265 mm Woofer |
| Frequency Range | 18 Hz to 300 Hz ± 3 dB (at -3 dB) |
| Frequency Response | 19 Hz to 300 Hz ± 2 dB |
| Maximum Sound Pressure Level (SPL) | 116.7 dB |
| Dynamic Range | 110 dBA |
| Total Harmonic Distortion (THD) | 0.001% |
| Maximum Input Level | 19 dBu |
| Analog Input Sensitivity/Gain | 6 / -8 dBu (Fixed) |
| Self-Generated Noise | Less Than 20 dBA (at 3.93″ / 10 cm) |
| Protections and Limiting | Peak Limiter and Thermal Limiting |
| CMRR | 60 dB |
| EQ | 1 x LF Shelf: -12 to 0 dB at 30 Hz |
| Filters | High-Pass at 6.5 Hz, 12 dB/Octave Slope |
| Crossover Frequency | 80 Hz, 24 dB/Octave Slope |
| Audio I/O | 1 x XLR Analog Input (13 Kilohms) |
| AC Input Power | 100 to 120 VAC, 60 Hz 220 to 240 VAC, 50 Hz |
| Power Consumption | 25 W (Idle) 550 W (Maximum) |
| Enclosure Material | Metal Grille, Wood |
| Dimensions (W x H x D) | 13 x 28.9 x 25.4″ / 330 x 735 x 645 mm |
| Weight | 103.6 lb / 47.1 kg |

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