Product Overview
Neumann's KH870 features their 7.1 High Definition Bass Manager™, which is compatible with all standard consumer formats from mono through to the latest 7.1 HD systems. Eight channels of analog or an optional 8-channel, 24-bit, 192 kHz digital input card 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 18Hz.
The KH870 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 KH870 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.
Includes
- (1) KH870
- (3) Power cables (Euro, UK, USA)
- (1) Operating manual
- (1) Supplement "Getting Started Quickly"
- (1) Product guarantee
Features
- Flexible Electronics:
- 7.1 Channel High Definition Bass Management™ compatible with all formats from mono to 7.1
- Bypassable 4th order 80Hz active crossover for maximum compatibility with consumer reproduction
- 0 and +10dB LFE gain and 4-mode LFE processing:
- LFE to subwoofer and left/right
- LFE to subwoofer only up to 80Hz
- LFE to subwoofer only up to 120Hz
- LFE to subwoofer with no filterin – for daisy chaining subwoofers and external signal processing systems
- Independent control of bass management for front and back channels
- System wide volume control via optional hardware remote controls or RS-232
- Acoustical controls adapt the subwoofer’s 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
- Remote-able electronics (REK3 and an SCnn) for installation convenience, less cabling, and convenience of use
- Integrated electronic limiter for amplifier and driver protection
- Low heat dissipation amplifiers
- Electronics can be remotely powered on with two modes of operation (0V and 12V trigger)
- Robust Drivers and Cabinet:
- Low frequency extension for main loudspeakers down to 18Hz
- Low distortion magnetically shielded long-throw drivers
- Reduced bass compression at high SPL from generously proportioned bass reflex ports
- Large system with 6 dB higher output than KH810
- A main loudspeaker can be mounted onto an KH870 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
- Acoustics:
- -3dB free field frequency response: 18 - 300Hz, ±3dB
- Pass band free field frequency response: 19 - 300Hz, ±2 dB
- Self-Generated noise level at 10cm: < 20dB(A)
- Sine wave output with a THD < 0.5 % at 1m: 40Hz @ 95dB SPL
- Max. SPL In half space at 3% THD: 116.7dB SPL
- Max. SPL with pink noise in half space at 1m: 112dB SPL
- Averaged between: 40 and 90Hz
- Electronics
- Amplifier, cont. (peak) output power (THD < 0.1 %): 320W (400W)
- Controller design: Analog, active
- Main channel crossover frequency: 80Hz
- Crossover slope: 24dB/oct
- Time of Flight adjustment delay: 0 … 4.69ms @ 80Hz (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: 6.5Hz; 12dB/oct.
- Remote control: via CAT-5
- Analog Inputs and Outputs:
- Input/Output channels: 7.1 / 7+Sum
- Impedance electrically balanced: XLR, 13kΩ
- Input sensitivity: -8 and +6dBu
- Max. input level: +19dBu (6.9Vrms) / per channel
- CMRR: > 60dB @ 15kHz
- Interchannel isolation (1kHz), level matching: -95dB, ±0.1dB
- Volume control range, resolution: 118dB, 0.25dB
- Dynamic range, THD+N: 119dB(A), < 0. 001% (-100dB)
- LFE Modes: 80+re-routing, 80, 120, wide
- LFE Gain: 0 / +10dB
- Gain Control: +2 - -12dB
- Displays and Mains Power:
- Displays and indicators: power on: Red LED
- limit/clip: Red LED "Flashing"
- bass management active: Green LED
- Mains power: 220 - 240 / 100 - 120 VAC (switchable)
- Power consumption - Idle: 30W
- Power consumption - Full output: 550W
- Mechanics:
- Cabinet surface finish: Painted
- Color: standard: Anthracite (RAL 7021)
- Baffle cover: Included metal grille
- Drivers: Magnetically shielded
- Woofer: 2x 10" (265mm)
- Dimensions: 28.9" H x 13" W x 25.4" D (735 x 330 x 645mm)
- Internal net volume: 86 l
- External volume: 156 l
- Weight: 103.6lbs (47.1 kg)
