Neumann KH 805 II 10in DSP-Controlled Powered Subwoofer

About: Neumann KH 805 II 10in DSP-Controlled Powered Subwoofer

The KH 805 II is the perfect subwoofer for medium sized rooms, providing bass extension with Neumann precision. It includes a unique and flexible Bass Manager for stereo systems and can also be used in surround and immersive setups for LFE reproduction or with external bass management. Analog and digital inputs and outputs allow for flexible connectivity. 

• Deep and powerful bass down to 16 Hz
• The perfect complement to mid-size Neumann KH line studio monitors
• DSP-controlled for superior sonics and unparalleled precision
• Room correction via MA 1 Automatic Monitor Alignment (sold separately)
• Supports automatic alignment also for analog KH-line studio monitors (patented)

Next Generation Subwoofer 

The KH 805 II improves on its predecessor in acoustic performance and adds new features. Thanks to a novel long-throw 10” woofer with Extremely Linear Force Factor (ELFF) technology and intelligent protection limiters, the KH 805 II ensures exceptionally low distortion even at maximum SPLs. 

The KH 805 II extends low frequency reproduction down to 16 Hz and delivers about twice the output of the KH 750 DSP. This makes the KH 805 II the perfect complement to mid-sized speakers such as the KH 150 and KH 310. 

The KH 805 II is DSP-controlled for superior sonic performance and seamless integration via MA 1 Automatic Monitor Alignment (sold separately). When combined with analog Neumann studio monitors such as the KH 120 A (discontinued), KH 310, or KH 420, it offers sufficient DSP-power for aligning the entire stereo system using MA 1, optimizing not only the frequency response but also the phase. The KH 805 II is therefore a massive upgrade for existing systems. Of course, the KH 805 II is also a perfect complement to Neumann’s DSP-equipped studio monitors.  

Precision in Every Detail 

As subwoofers are typically placed on the floor, a robust grille protects the driver from accidental damage. The rigid cabinet features a highly efficient bass reflex system, which is carefully engineered and tuned for the tightest bass reproduction – with inaudible port noise. 

The two analog XLR inputs are electronically balanced, as are the two analog XLR outputs. The up to 192 kHz / 24-bit digital input (BNC) accepts both AES3 and S/P-DIF signals. The subwoofer has an Auto Standby function, which can be deactivated via a backplate switch. 

The KH 805 II excels in music, broadcast, and post-production studios for tracking, mixing, and mastering.  

Benefits 

• Bass extension of the monitoring system down to 16 Hz
• Increasing the maximum SPL of the entire system
• Decreasing harmonic and intermodulation distortion of loudspeakers
• MA 1 Ready for perfect alignment of the entire system and seamless subwoofer integration. For multichannel setups, we offer MA 1 Multichannel Extension option.
• MA 1 integration of analog KH Line speakers, enough DSP power for an entire stereo system. 

Features

• Compact ultra stiff wooden cabinet - Tough painted finish and build-in rubber feet for acoustic isolation 
  • Excellent self-damping properties leading to minimal cabinet resonances
  • No standing wave resonances inside cabinet
  • Ultra tight bass reproduction due to very low group delay 
• In-house modelled long-throw bass driver with Extremely Linear Force Factor (ELFF) and robust resonance optimized basket
  • Damping of breakup modes brings low distortion at high sound levels
  • Extremely linear force factor provides low harmonic distortion even at high excursions
  • Reduced air noise and minimized rocking modes
  • Grille protects against mechanical damage 
• 2.0/ 0.1 Bass Management 
  • Stereo and external bass managed applications
  • Bypassable 4th order crossover for maximum compatibility with consumer reproduction systems
  • Allows main loudspeakers to play louder and with lower distortion 
• Four routing modes 
  • Stereo 80 Hz bass management
  • External bass management 
  • LFE up to 120 Hz
  • LFE full range
• XLR electronically balanced analog inputs and outputs 
  • Standard interfacing to professional equipment
  • Daisy chain output for subwoofer arrays 
• Wide range input gain and output level controls 
  • Easier interfacing with signal sources
  • 8-position phase control, continuous low cut control
  • More control in various acoustical environments
  • Easy to correct room modes 
• Universal switched-mode power supply (100 … 240 V) 
  • One version works in any country and is robust to poor quality mains supply 
• Ground lift to overcome ground loops 
  • Inputs with very high CMRR to reduce noise induced by long cables in electrically noisy environments
  • Completely symmetrical internal signal flow to avoid electrical interferences 
• Low heat dissipation amplifiers with large headroom and sophisticated protection circuitry 
  • Improved transient response
  • Assured reliability and safety
  • Separate thermo limiter to protect the voice coil and power amplifier
  • Soft clip and excursion limiters 
  • Increases system reliability
  • Allows extraction of the maximum performance from the system 
• Digital input and output 
  • 192 kHz, 24-bit conversion
  • BNC connector: AES3 and S/P-DIF signals 
• Network connector using standard IP protocol and your existing network infrastructure
  • Loudspeaker system including analog KH-line monitors can be controlled via MA 1 - Automatic Monitor Alignment Software. 
• Control function
  • Toggle switch for selection of two completely independent modes of operation and calibration: on the device or via the network using the MA 1 - Automatic Monitor Alignment software. 
• Standby function
  • Reduces power consumption when product is not in use. 

Specifications

• Acoustics
  • Free field frequency response ±6 dB: 16 ... 750 Hz
  • Free field frequency response ±3 dB: 18 ... 310 Hz
  • Frequency response ripple; range, deviation: 20 ... 295 Hz, ±1.5 dB
  • Self-generated noise at 10 cm (with input gain set to 100 dB SPL for 0 dBu): <20 dB(A) SPL
  • Sine wave output with a THD < 0.5 % at 1 m in half space: 95 dB SPL (42 - 200 Hz)
  • Bass capability: Max. SPL in half space at 3% THD at 1m (averaged between 50 Hz and 100 Hz): 110 dB
  • Max. SPL for subwoofers: on floor; against the wall; in the corner: 110 dB; 113 dB; 116 dB;
  • Dolby DARDT. Max SPL bass managed: 118 dB SPL
  • Acoustical Principle: Bassreflex, Ports at the front
• Analog Inputs and Outputs
  • Analog input(s): 2 x XLR: electronically balanced;
  • Analog input impedance: >13k Ohms
  • Max. input level for 100 dB SPL Output Level and 0 dB Gain Setting: +24 dBu
  • Max. input level: 24 dBu
  • 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: 119 dB(A); <0.003% (-90 dB)
  • Signal routing modes: Right; External Bass Management; 2 x LFE
  • Analog output(s): 2 x XLR; analog electronically balanced
• Digital Inputs and Outputs
  • Digital input(s): BNC (75 Ω): AES3; S/P-DIF
  • Digital output(s): BNC (75 Ω): AES3
  • Digital converter: resolution; design: 16 … 24-bit DAC; Δ∑
  • Digital converter: sampling rate: 22.05; 24; 32; 44.1; 48; 64; 88.2; 96; 176.4; 192 kHz
  • Digital internal sampling rate: 48 kHz
  • Output sampling rate: 48 kHz
  • Dynamic range A-D-A (Converter): >120 dB(A)
  • Dynamic range D-A: >123 dB(A)
  • Digital sensitivity: -18 dBFS = 100 dB SPL at 1 m
  • Latency ADA / DA: 1.5 ms (A-D-A); 1.2 ms (D-A)
  • Delay: User adjustable delay range: 0 ... 100 ms and 2 x 0 ... 20.8 ms
  • Delay: Resolution: time; distance: 20.8 µs; 0.71 mm (0.28 ")
  • Delay: Max. frames Audio-video synchronisation (lip sync): 2.5 (40 ms) frames; 3 (33 ms) frames
  • Delay: Time-of-flight maximum distance: 2 x 7.16 m (23' 5")
• User Interface
  • Status Indication: 2x Status LED on Backplate
  • Input gain control (sensitivity): +2 ... -12 dB
  • Output level control (output level in 1 m based on 0 dBu input level): 94; 100; 108; 114 dB SPL
  • Input Select: automatic; AES3id prio over analog
  • Ground Lift: Yes
  • Control: Local; Network
  • Equalization: Low cut: 30 Hz; 0 … -12 dB
  • Phase: 0; 45; 90; 135 and 0/180 deg
  • Mains Switch: Yes
  • Mains Voltage: Universal Power Supply 100 V~ … 240 V~
  • Bass Management On: Yes
• Electronics - Controller
  • Controller design: Digital; active
  • Crossover frequency: 80 Hz fixed
  • 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: peak limiter Amplifier, thermo limiter woofer, temperature limiter electronics, temperature limiter power supply, temperature limiter power amplifier, temperature protection amplifier, over current protection amplifier, over current protection power supply
  • Remote control: via Ethernet and MA 1
  • Display: On; Normal Operation: Green LED on backplate
  • Display: Identification: Flashing red LED on backplate
  • Display: Limit / Clip / Errors / Protection /Boot Mute / Shut Down Mute: Red LED on backplate
• Electronics - Amplifiers and Power Supply
  • Output power woofer amplifier (THD+N with limiter deactivated: 10%) 222 W
  • Output power woofer amplifier (THD+N with limiter activated: 10%) 222 W
  • Mains Power Supply: input voltage; frequency: SMPS: 100-240 V; 50/60 Hz
  • Power consumption (230 V / 100 V): Standby: <300 mW
  • Power consumption (230 V / 100 V): Idle: 17 W
  • Power consumption (100 V): Full output: 310 W
  • Power consumption (230 V / 100 V): Full output: 310 W
  • Power consumption (240 V): Full output: 285 W
  • Standby: automatic, 20 mins (default)
• Mechanics
  • 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: 265 mm (10") with protecting black metal grille
  • Dimensions (HxWxD): 368 x 330 x 645 mm (14.5" x 13" x 25.4")
  • External net volume: 78 liters
  • Weight: 25.5 kg (56 lbs 3 oz)
  • Acoustical Axis horizontal: 165 mm
  • Acoustical Axis vertical (from bottom): 165 mm

What's in the Box

• 1x KH 805 II Subwoofer
• 4x Mains Cables, black (EU/KR, UK, US and CN)
• 1x Safety Guide
• 1x Supplement “Getting Started Quickly”