Neumann KH 870 10 Inch Active Studio Subwoofer

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The Neumann KH 870 10-Inch Active Studio Subwoofer is a professional-grade subwoofer ideal for tracking, mixing, and mastering applications in music, broadcast, and post production facilities. It has a 7.1 High Definition Bass Manager™ that is compatible with all standard consumer formats from mono all the way up to more recent 7.1 high-def 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. Fourth-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 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 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 full-range monitors.

Features:

• Flexible Electronics
  • 7.1 Channel High Definition Bass Management™ compatible with all formats from mono to 7.1
  • Bypassable 4th order 80 Hz active crossover for maximum compatibility with consumer reproduction
  • 0 and +10 dB LFE gain and 4-mode LFE processing:
    • LFE to subwoofer and left/right
    • LFE to subwoofer only up to 80 Hz
    • LFE to subwoofer only up to 120 Hz
    • LFE to subwoofer with no filtering - 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
  • Remoteable electronics (REK 3 and an SC nn) for installation convenience, less cabling, and convenience of use
  • Integrated electronic limiter for amplifier and driver protection
  • Low heat dissipation amplifier
  • Electronics can be remotely powered on with two modes of operation (0 V and 12 V trigger
• Robust Driver & Cabinet
  • Low frequency extension for main loudspeakers down to 18 Hz
  • Low distortion magnetically shielded long-throw driver
  • Reduced bass compression at high SPL from generously proportioned bass reflex ports
  • A main loudspeaker can be mounted onto a KH 870 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

• Acoustics:
  • -3 dB Free Field Frequency Response: 18 - 300 Hz, ± 3 dB
  • Pass Band Field Frequency Response: 19 - 300 Hz, ± 2 dB
  • Self-Generated Noise Level @ 10 cm: < 20 dB(A)
  • THD < 0.5% @ 95 dB SPL 1 m: > 40 Hz
  • Max. SPL In Half Space w/ 3% THD @ 1 m (averaged between 40 and 90 Hz): 116.7 dB SPL
  • Max. SPL w/ Pink Noise In Half Space @ 1 m: 118 dB SPL
  • Electronics:
    • Amplifier, Cont. (Peak) Output Power: 320 W (400 W)
    • THD & Noise @ Cont. Load: < 0.1% (-60 dB) w/ deactivated limiter
    • Controller Design: Analog, active
    • Main Channel Crossover Frequency: 80 Hz
    • Crossover Slope: 24 dB/oct, 4th order
    • Acoustical Control:
      • Low Cut:
        • Center Frequency: 30 Hz
        • Q-Factor: 1.5
        • Gain Range: 0 to -12 dB
      • Parametric Equalizer:
        • Bypassable
        • Gain Range: +4 to -12 dB
        • Frequency: 20 to 120 Hz
        • Q-Factor: 1 to 8
    • Time of Flight Adjustment Delay: 0° to -315°, adjustable in steps of 45°
    • Volume Control: 100 dB SPL, 114 dB SPL
    • Input Sensitivity: -12 dB to +2 dB
    • Calibration Tools: internal signal generator
    • Protection Circuitry: Peak and thermal limiters
    • Infrasonic Filter Frequency; Slope: 6.5 Hz; 12 dB/oct
    • Remote Control: via cable remote control & RS-232
  • Analog Inputs & Outputs:
    • Input/Output Channels: 7.1 / 7+Sum
    • Impedance, Electrically Balanced: XLR, 13 kΩ
    • Input Sensitivity: -8 and +6 dBu
    • CMRR of Inputs: > 60 dB @ 15 kHz
    • Max. Input Level: +19 dBu (6.9 Vrms) / per channel
    • Cross-Talk Between Channels (1 kHz): < -95 dB
    • Level Matching: ± 0.1 dB
    • Volume Control Range (Via Remote Control): 118 dB, 0.25 dB steps
    • Dynamic Range, THD+N: 119 dB(A), <0. 001% (-100 dB)
    • LFE Modes: 80 +re-routing, 80, 120, full-range
    • LFE Gain: 0 dB / +10 dB (switchable)
    • Gain Control: +2 to -12 dB
  • Displays:
    • Switch-On Indicator: Red LED lights up (and remote control logo)
    • Limit/Clip: Red LED "Flashing" (and remote control logo)
    • Bass Management Active: Green LED lights up
  • Product Properties:
    • Mains Voltage: 220 - 240 / 100 - 120 V AC (switchable), 50-60 Hz
    • Power Consumption:
      • Idle: 25 W
      • Full Output AC: 550 W
    • Cabinet Surface Finish: Painted wood (MDF)
    • Color, Standard: Anthracite
    • Baffle Cover: Included metal grille
    • Drivers: Magnetically shielded 2 x 10 in | 2 x 265 mmm
    • Woofer: 10 in | 265 mm
    • Net Volume:
      • Internal: 86.0 ⌊
      • External: 156.0 ⌊
    • Mounting Points: Mounting flange (∅ 1.5 in | 38 mm) on upper side
    • Dimensions (H x W x D): 28.9 x 13 x 25.4 in | 735 x 330 x 645 mm
    • Weight: 103.6 lbs | 47.1 kg