Neumann KH 870 II

Product Description
The Neumann KH 870 II is a professional DSP-controlled subwoofer designed for large control rooms and immersive audio systems supporting up to 7.1.4 configurations. It features two long-throw 10-inch bass drivers with Extremely Linear Force Factor (ELFF™) technology that deliver clean, low-distortion bass extension down to 16 Hz. The KH 870 II includes a flexible multichannel bass manager for stereo, surround and immersive setups, and offers extensive analog and digital connectivity options including balanced XLR and SUB-D25 connectors as well as AES3 BNC outputs. With advanced DSP control and support for Neumann MA 1 Automatic Monitor Alignment, it enables seamless integration in complete monitoring systems and enhances both stereo and multichannel playback with precision and power. :contentReference[oaicite:0]{index=0}

Features
DSP-controlled active subwoofer with multichannel bass manager up to 7.1.4.
Dual long-throw 10-inch bass drivers with ELFF™ technology for low distortion and deep bass response.
Flexible analog inputs and outputs including balanced XLR and SUB-D25 for up to 12 channels of input and 11 channels of output.
Digital AES3 outputs via BNC for multichannel distribution.
Bass reflex design for efficient and controlled low-frequency reproduction.
Auto Standby function for energy-efficient operation.
Robust cabinet with protective grille for driver safety.
Support for MA 1 Automatic Monitor Alignment for precise room correction and phase optimization. :contentReference[oaicite:1]{index=1}

Specifications
Type: Active DSP-controlled subwoofer
Frequency Response (±6 dB): 16 Hz-750 Hz
Frequency Response (±3 dB): 18 Hz-310 Hz
Passband Frequency Response: 20 Hz-295 Hz (±1.5 dB)
Maximum SPL: 115 dB SPL
Bass Principle: Front-ported bass reflex
Analog Inputs: 2 x balanced XLR, 2 x SUB-D25 balanced
Analog Outputs: 2 x balanced XLR, 2 x SUB-D25 balanced
Digital Outputs: 7 x BNC AES3 for multichannel distribution
DSP Bass Management: Yes, with multichannel support
Adjustable Delay: 0 … 115 ms
ADA Latency: 2 ms
Power Supply: Universal PSU 100-240 V, 50/60 Hz
Cabinet Type: Bass reflex with front ports
Woofer Size: 2 x 265 mm (10\")
Dimensions (H x W x D): 737 mm x 330 mm x 645 mm
Weight: Approx. 44.5 kg :contentReference[oaicite:2]{index=2}