KH 870 II
Subwoofer
From Neumann:
The KH 870 II is the perfect subwoofer for larger rooms, providing powerful bass extension with Neumann precision. It includes a unique and flexible Bass Manager for stereo, surround and immersive systems up to 7.1.4. Analog and digital outputs provide flexible connectivity to up to 11 studio monitors.
The KH 870 II improves on its predecessor in acoustic performance and adds new features. Thanks to two novel long-throw 10” woofers with Extremely Linear Force Factor (ELFF™) technology and intelligent protection limiters, the KH 870 II ensures exceptionally low distortion even at maximum SPLs.
The KH 870 II extends low frequency reproduction down to 16 Hz and delivers about twice the output of the KH 810 II. This makes the KH 870 II the perfect complement to midfield speakers such as the KH 420.
Specs
- Free field frequency response ±6 dB
- 16 ... 750 Hz
- Free field frequency response ±3 dB
- 18 ... 310 Hz
- Self-generated noise at 10 cm (with input gain set to 100 dB SPL for 0 dBu)
- <20 dB(A) SPL
- Minimal self-generated noise at 10 cm self generated noise/ input gain setting/output gain setting
- <20 dB(A) SPL
- Sine wave output with a THD < 0.5 % at 1 m in half space
- 95 dB SPL (33 - 200 Hz)
- Bass capability, Max. SPL in half space at 3% THD at 1m (averaged between 50 Hz and 100 Hz)
- 114.9 dB
- Max. SPL for subwoofers, on floor; against the wall; in the corner
- 114,9 dB; 117,9 dB; 120,9 dB
- Dolby DARDT. max SPL bass managed
- 123 dB SPL
- Acoustical principle
- Bassreflex, Ports at the front
- Analog input(s)
- 2 x XLR: electronically balanced; 1 x SUB-D 25: 8 x electronically balanced; 1 x SUB-D 25: 4 x electronically balanced
- Analog input impedance
- >12k Ohms
- Max. input level
- 24 dBu (CH 1...3, 12); 21 dBu (CH 5...11)
- Common mode rejection ratio (CMRR), XLR / Sub-D
- > 56 dB @ 15 kHz
- Crosstalk (1 kHz), level matching, XLR / Sub-D
- -90 dB; ±0.1 dB
- Remote volume control
- via MA 1 software
- Volume control range; resolution
- 0 … -∞ dB; 0.1 dB
- Analog dynamic range; THD+N (A-D-A), XLR / SubD
- 120 dB(A)(CH1...3,12); 116dB(A) (CH5...11) <0.003% (-90 dB)
- Signal routing modes
- analog
- Analog output(s)
- 2 x XLR: electronically balanced; 1 x SUB D 25: 7 x electronically balanced; 1 x SUB D 25: 4 x electronically balanced
- Digital input(s)
- 1 x BNC: Daisychain in
- Digital output(s)
- 7 x BNC: 11 x Monitor out; 1 x daisychain out
- Digital converter, resolution; design
- 24 Bit
- Digital converter, sampling rate
- 32 kHz..200 kHz
- Digital internal sampling rate
- 48 kHz
- Output sampling rate
- 48 kHz
- Dynamic range A-D
- CH 1, 2, 3, 12=124 dBA; CH 5...11=121 dBA
- Dynamic range A-D-A (Converter)
- CH 1, 2, 3, 12=121.5 dBA; CH 5...11=116.2 dBA
- Dynamic range D-A
- CH 1, 2, 3, 12=125 dBA; CH 5...11=118 dBA
- Digital sensitivity
- -18 dBFS = 100 dB SPL at 1 m
- Latency ADA / DA
- 2 ms (A-D-A)
- Delay, user adjustable delay range
- 0 ... 115 ms
- Delay, resolution, time; distance
- 20.8 µs; 0.71 mm (0.28 ")
- Delay, Max. frames Audio-video synchronisation (lip sync)
- 2 (40 ms) frames; 2.75 (33 ms) frames
- Delay, Time-of-flight maximum distance
- Out of 115 ms, FW based
- Status indication
- Illuminated Neumann Logo
- Ground lift
- Yes
- Control
- Local; Network
- Mains switch
- Yes
- Mains voltage
- Universal Power Supply 100 V~ … 240 V~
- Controller design
- Digital; active
- DSP resolution
- 32 Bit Audio, Processing 64 Bit double precision
- Crossover frequency
- 80 Hz
- Crossover slope
- 24 dB/oct; 4th order
- Supports automatic room calibration via MA 1
- Yes; Subwoofer and connected analog loudspeakers
- FIR phase linearization
- for connected analog loudspeakers in combination with MA 1
- Protection circuitry
- soft clip, peak and thermo limiters; Woofer excursion limiter; thermo limiter for the electronics and amplifiers
- Remote control
- via Ethernet and MA 1
- Display, on; normal operation
- Neumann logo “White”
- Display, identification
- Neumann logo “Rosé”
- Display, limit / clip / errors / protection /Boot mute / shut down mute
- Neumann logo “Red”
- Logo brightness
- via MA 1 software
- Output power woofer amplifier (THD+N with limiter activated, 0.1%)
- 360 W
- Mains power supply, input voltage; frequency
- SMPS: 100-240 V; 50/60 Hz
- Power consumption (230 V / 100 V), standby
- <=300mW
- Power consumption (100 V), idle
- 41 W
- Power consumption (230 V / 100 V), idle
- 41 W
- Power consumption (230 V), idle
- 41 W
- Power consumption (100 V), full output
- 510 W
- Power consumption (230 V / 100 V), full output
- 510 W
- Power consumption (240 V), full output
- 472 W
- Standby
- automatic, 20 mins (default)
- Amplifier standby
- Disabled; user defined in software
- Cabinet material
- Wood cabinet, aluminum electronics panel
- 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); <75% RH, non-condensing
- Transport/storage conditions
- -25° C to +60° C (-13° F to 140° F); <90% RH; non-condensing
- Woofer
- 2 x 265 mm (10") with protecting black metal grille
- Mounting points
- 35 mm flange on top panel
- Product dimensions (height x width x depth)
- 737 x 330 x 645 mm (28.9" x 13" x 25.4")
- External net volume
- 157 liters
- Product weight
- 44.5 kg (98 lbs 2 oz)
- Packed dimensions (height x width x depth), mm (inches)
- 839 x 454 x 749 (33" x 17.9" x 29.5")
- Packed weight
- 51.2
- Packaging weight inc. cables and manuals
- 6.7
- Packed cube
- 0.285 m³
- Delivery includes
- 1 x KH 870 II Mains cables EU/KC; UK; US; China 1 x Getting Started Quickly guide 1 x Operating Manual
- Acoustical axis horizontal
- 165 mm
- Acoustical axis vertical (from bottom)
- 365 mm
- Included
- 1 x KH 870 II, 4 x Mains Cables, black (EU/KR, UK, US and CN), 1 x Safety Guide, 1 x Supplement “Getting Started Quickly”
Source: Neumann KH 870 II product page