Neumann.Berlin KH 810 Operating Manual
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Neumann.Berlin KH 810 Operating Manual

With 7.1 high definition bass management
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georg neumann gmbh · ollenhauerstr. 98 · 13403 berlin · germany
tel +49 (0)30 / 41 77 24-0 · fax -50 · headoffice@neumann.com · www.neumann.com
KH 810/870
Active Subwoofer
with 7.1 High Definition Bass Management™
Operating Manual

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Summary of Contents for Neumann.Berlin KH 810

  • Page 1 KH 810/870 Active Subwoofer with 7.1 High Definition Bass Management™ Operating Manual georg neumann gmbh · ollenhauerstr. 98 · 13403 berlin · germany tel +49 (0)30 / 41 77 24-0 · fax -50 · headoffice@neumann.com · www.neumann.com...

  • Page 3: Table Of Contents

    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Resetting the settings of the KH 810/870 .

  • Page 4: Important Safety Instructions

    . There are no user serviceable parts inside . Refer servicing to your Neumann service partner . Read and follow the safety and operating instructions contained in the operating manual . 2 | KH 810/870...
  • Page 5 . “Improper use” means using the product: • other than as described in this operating manual, or • under operating conditions which differ from those described herein . This will invalidate the guarantee . KH 810/870 | 3...

  • Page 6: The Kh 810/870 Subwoofer

    The KH 810/870 subwoofer Thank you for purchasing a Neumann subwoofer . Neumann subwoofers are designed to com- plement Neumann’s extensive range of monitors . They can be used in music, broadcast, and post production studios for tracking, mixing, and mastering . They can be positioned next to a wall or flush mounted into a wall, and can be mixed freely in multi-channel systems with other loudspeakers and subwoofers from the Neumann Studio Monitor Systems range .

  • Page 7: Product Overview

    Product overview 1 Neumann logo 2 Metal grille 3 Bass reflex ports KH 810/870 | 5...
  • Page 8 Max. power consumption: excess of 85 dB. This may cause 290 W (KH 810) / 550 W (KH 870) permanent hearing damage so user caution is recommended. Noise exposure is a function of SPL and time, so observe local regulations when listening at high levels for a long time.
  • Page 9 5x20 mm SB 5.0 A Max. power consumption: excess of 85 dB. This may cause 290 W (KH 810) / 550 W (KH 870) permanent hearing damage so user caution is recommended. Noise exposure is a function of SPL and time, so observe local regulations when listening at high levels for a long time.

  • Page 10: Installing And Connecting The Kh 810/870

    . Despite a thorough testing of the synthetics used by us, we cannot rule out the possibility of staining . Do not place the KH 810/870 on delicate surfaces . The bottom of the subwoofer features rubber feet which reduce the risk of scratching the sur- face and the subwoofer cabinet, and acoustically isolate the subwoofer from the surface .

  • Page 11: Setting Up The Subwoofers

    . The subwoofers can then be calibrated to a lower out- put level resulting in lower distortion and correspondingly cleaner low-frequency reproduction . For information on building a balanced system, please refer to the “Product Selection Guide” at www .neumann .com . KH 810/870 | 9...
  • Page 12 Subwoofers are omni-directional in their typical pass band as the generated wavelength is long compared to the surface producing the sound, therefore it does not matter in which direc- tion the subwoofer is oriented when placed in the listening environment . 10 | KH 810/870...

  • Page 13: Connecting The Subwoofer

    The level delivered by devices with RCA outputs (-10 dBV) is usually less than the studio level (+4 dBu): If necessary, use active unbalanced-to-balanced converters in order to be able to connect devices with unbalanced signals . KH 810/870 | 11...
  • Page 14 Bass Manager Sum Output Σ 5.1 and 2.0 signals Optional additional subwoofers Right Right Center Center Left Left Left Back Left Back Right Back Right Back Left Surround Left Surround Right Surround Right Surround 12 | KH 810/870...
  • Page 15 To increase the number of subwoofers in a system and to make a Plane Wave Bass Array™, you can connect the KH 810/870 to additional KH 810/870 subwoofers . In such a set-up, the input signals are only connected to the first subwoofer in the chain . The LFE mode and bass manage- ment is defined in the first subwoofer .
  • Page 16 9 .5 dB acoustical boost for the LFE channel only . The LFE channel level should be adjusted at the audio source by –9 .5 dB or +0 .5 dB so that the reproduction level (0 or +10 dB) is consistent with the main channels . 14 | KH 810/870...
  • Page 17 Connecting/disconnecting the subwoofer to/from the mains power supply To connect the KH 810/870 to the mains power supply: Make sure that the switch MAINS POWER 5 is set to “OFF” . Make sure that the switch MAINS VOLTAGE SELECTION 4 is set to the correct position: “AC 100/120 V”...
  • Page 18 Material damage due to improper use of cables! If you insert a network cable that is connected to the KH 810/870 into a network socket, the network device can be damaged . If network signals are transmitted to the KH 810/870 via a network cable, the KH 810/870 can be damaged .

  • Page 19: Using The Kh 810/870

    Using the KH 810/870 Switching the subwoofer on/off You can switch the KH 810/870 on and off using the switch MAINS POWER 5 or remotely . KH 810 MAINS POWER OPTIONAL OPTIONAL REMOTE REMOTE POWER ON/OFF POWER ON / OFF...
  • Page 20 Next to or flush -2 dB 0 dB mounted in an acoustically soft wall (e .g . gypsum) -2 dB Free standing in an 0 dB untreated room Free standing in a 0 dB 0 dB well-treated room 18 | KH 810/870...
  • Page 21 Calibration using Neumann test signals Download the Neumann test signals and the instructions for use (PDF file, in English) from the KH 810/870 product page at www .neumann .com . Follow the steps described there . Calibration using music signals and an 80 Hz test signal Adjust the settings for the sound pressure level and the frequency response as described above .

  • Page 22: Compensating For Larger Time Of Flight (Tof) Differences

    First, check if a 10 dB gain has already been applied somewhere else in the signal path . If this is the case: Make sure that the switch LFE GAIN R is set to “0 dB” . 20 | KH 810/870...
  • Page 23 Additionally, this mode is useful for detecting higher frequency signal components (up to 300 Hz) in the LFE channel that should be avoided during mixing . Please note that the LFE gain is always 0 dB in this mode . KH 810/870 | 21...

  • Page 24: Activating Ground Lift

    • Firmware revision The PDF file “7 .1_bass_manager_control_protocol” contains a list of the RS-232 com- mands that can be used to control the KH 810/870, and it can be downloaded from the KH 810/870 product page at www .neumann .com .
  • Page 25 The system output level continues at the level value last send to the subwoofer . To reset the system output level to 0 dB: Switch the subwoofer off and on again . Set the switch VOLUME CONTROL I to “DISABLE” . KH 810/870 | 23...

  • Page 26: Resetting The Settings Of The Kh 810/870

    • settings that deviate from the actual position of the switches of the KH 810/870 . To reset the KH 810/870 to the factory default settings or to reset the settings of the switches on the rear of the subwoofer: Switch the subwoofer off and on again by setting the switch MAINS POWER 5 to “OFF”...

  • Page 27: Cleaning And Maintaining The Subwoofer

    . If necessary, reset the settings of the KH 810/870 (see page 23) . The LED POWER ON E goes The signal level is too high, Reduce the signal level .

  • Page 28: Specifications

    0 .25 dB steps 119 dB(A), < 0 .001% at -100 dB Dynamic range, THD+N LFE modes 80 +re-routing, 80, 120, fullrange LFE gain 0 dB / +10 dB (switchable) Gain control +2 … -12 dB 26 | KH 810/870...
  • Page 29 Acoustical measurements, block diagram and pin assignment Additional technical data such as acoustical measurements, a block diagram of the KH 810/870 and the pin assign- ments of the XLR socket and the REMOTE CONTROL AND RS-232 socket B can be found at the end of this operating manual .

  • Page 30: Accessories

    Accessories Product Description FO 810 Flight case for KH 810 FO 870 Flight case for KH 870 RC 2 Remote control cable, 2 m RC 5 Remote control cable, 5 m RC 10 Remote control cable, 10 m RC 15...

  • Page 31: Manufacturer Declarations

    . This class B digital apparatus complies with the Canadian ICES-003 . Changes or modifications made to this equipment not expressly approved by Neumann may void the FCC authorization to operate this equipment . KH 810/870 | 29...

  • Page 32: Technical Information & Glossary

    . The acoustical axis is located at the midpoint of the KH 810’s bass driver or at the midpoint of the bass drivers of the KH 870 . Acoustical The acoustical controls are low-order analog filters designed to compensate for some of the acoustical controls issues commonly found in listening environments .
  • Page 33 Graphs of acoustical measurements conducted in anechoic conditions at a distance 1 m can be found at the end of this operating manual . Color versions of these graphs can be found on the corresponding product pages at www .neumann .com . KH 810/870 | 31...
  • Page 34 5 .1 system . The designation “LFE channel” always refers to the source and not to the loudspeakers . Power The high efficiency power amplifiers of the KH 810/870 minimize power dissipation and are run in amplifier(s) bridged mode to minimize distortion .
  • Page 35 (subwoofer is soloed) to find the source of rattles in the listening room . Using subwoofer mute and bass management together gives some useful additional functionality: Bass management Subwoofer Bass extension (-3 dB) 18 Hz MUTED 80 Hz DISABLE Main loudspeaker’s LF cut-off DISABLE MUTED Main loudspeaker’s LF cut-off KH 810/870 | 33...

  • Page 37: System Block Diagram

    RJ-45 pins/Buchsenbelegung der RJ-45 Pole/Cablage des tion/Función broches RJ-45/Asignación de las hembras de los polos RJ-45 Volume control LOGO voltage RS 232 TX RS 232 RX Supply voltage +3 .3 V Bypass bass management +10 dB LFE gain RS-232 data connection KH 810/870 | I...

  • Page 38: Acoustical Measurements

    Le fichier PDF « 7 .1 High Definition Bass Manager Remote Control Wiring Dia- gram » contient un schéma de brochage pour confectionner une télécommande individuelle pour le KH 810/870 . Vous pouvez télécharger ce fichier PDF depuis la fiche produit du KH 810/870 sur www .neumann .com .
  • Page 39 –30 –40 –50 –60 –70 –80 –90 KH 810 KH 810 + KH 120 KH 810 + KH 120 Free-field response Group delay Freifeld-Frequenzgang Gruppenlaufzeit Réponse en champ libre Temps de propagation de groupe Respuesta en frecuencia en campo libre Retardo de grupo –20...
  • Page 40 –10 –15 –15 0.005 0.02 1 kHz 0.005 0.02 1 kHz LFE channel electrical response Elektrischer Frequenzgang LFE-Kanal Courbe de réponse électrique du canal LFE Respuesta eléctrica del canal LFE –10 –20 0.02 10 kHz IV | KH 810/KH 870...
  • Page 42 03/13 · 544943/a02 printed in germany...

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