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K+H O 500 C Installation And Operation Manual

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Digital Studio Monitor
O 500 C
Installation and Operation Manual
058-E0012
Version 021025
K+H Vertriebs- und
Tel: +49 (0) 5130 5848-0
Fax: +49 (0) 5130 5848-11
Entwicklungsgesellschaft mbH
Email: infoklein-hummel.de
www.klein-hummel.de
Auf dem Kessellande 4a • 30900 Wedemark/Germany
www.klein-hummel.com

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  • Page 1 Digital Studio Monitor O 500 C Installation and Operation Manual 058-E0012 Version 021025 K+H Vertriebs- und Tel: +49 (0) 5130 5848-0 Fax: +49 (0) 5130 5848-11 Entwicklungsgesellschaft mbH Email: infoklein-hummel.de www.klein-hummel.de Auf dem Kessellande 4a • 30900 Wedemark/Germany www.klein-hummel.com...
  • Page 2 Fig.1: Front view Fig. 2: Rear view Fig. 3: IR Remote control RC-55 Page 2...

  • Page 3: Table Of Contents

    Contents: 0 Safety instructions ........................4 1 Description 1.1 Advantages of digitally controlled monitor systems...............5 1.2 System concept........................6 1.3 Block diagram.........................7 1.4 The modules of the digital controller..................9 2 Installation / Setup 2.1 Positioning / Mounting ......................12 2.2 Connectors and wiring ......................14 2.3 VF-display on the front baffle....................18 2.4 Recall of the loudspeaker parameter setup.................18 3 Operation / Description of Menus...

  • Page 4: Safety Instructions

    To ensure safe operation for years to come, keep these instructions in a safe place for future reference. K+H has manufactured this product in accordance with IEC 1992 (SEC) 39 standards, then tested and delivered it in safe operating condition. To maintain it in this condition, you must: •...

  • Page 5: Advantages Of Digitally Controlled Monitor Systems

    1.1 Advantages of Digitally Controlled Monitor Systems - optimizing of frequency responses, e.g. an absolutely linear adjustment from 30 Hz – 20 kHz. Any other desired frequency curves can be set/adjusted/stored - setting of phase response(s) in any combination, such as linear-phase, minimum-phase, mixed- phase with the resulting group-delays (constant group delay, continiously decreasing, etc.) - attack and release times of speakers will be remarkably improved - more precise stereo-locating, as there is virtually no deviation in a stereo pair...

  • Page 6: System Concept

    IIR filters directly in the monitor - Individual FIR filter settings can be made by aligning the O 500 C in it’s final position in the studio (optional). This way the room specific modes, such as resonances, standing waves etc. can be compensated - A precise limiter section will allow for perfect system management by offering a “...

  • Page 7: Block Diagram

    All audio parameters, except for the power amplifiers, are controlled by the internal DSP. An analog signal, connected to the O 500 C, will be A/D converted and then fed to the DSP, where all parameters selected are processed in the digital domain. When the signal has passed all stages in the DSP, it will be D/A converted and then sent to the analog power amplifiers.
  • Page 8 Input High Digital Input Low Freq. Driver Subwoofer Output DSP Board Power Amplifier Board Digital Controller Power Supply Board Mains Main Torroidial Socket Switch Transformer Speaker Enclosure Fig. 1.3/1: Block diagram of the O 500 C studio monitor Page 8...

  • Page 9: The Modules Of The Digital Controller

    Factory preset is parallel „input to output“, i.e. a direct link to the output, so the signal can be fed to the next O 500 C in a stereo setup. In the menu DIGITAL INPUT SELECT you now may choose the L or R channel from the digital data stream.
  • Page 10 Page 10...
  • Page 11 frequency response, but also for a very complex adjustment of the system, including the phase adjustments! Furthermore the reaction of the drivers and the electric performance of the amplifier and the digital controller itself are monitored by the controller. - Gain: This function adjusts the individual gain in every signal path of the crossover. The values of possible parameters are influenced by a multitude of menu settings, which can be selected individually.

  • Page 12: Positioning / Mounting

    - from the ceiling with mounting bracket LH 35 Mounting on a tripod - free standing on a stand or pedestal Fig. 2.1/2 shows how the O 500 C is mounted - flush-mount into a wall ANALOG INPUT DIGITAL S/P-DIF...
  • Page 13 Flush mount into a wall possible to add the LH 29 and LH 28 for mounting The O 500 C can also be flush mounted into a the monitor on a speaker stand. With the LH 35 wall or other areas where limited or no airflow mounting bracket it is also possible to have the can be provided.

  • Page 14: Connectors And Wiring

    Mains Switch with Groundlift-Switch Power-ON Lamp 2.2.1 The connectors on the rear panel GROUND All connectors of the O 500 C are located on CONNECTED LIFTED the rear panel, placed in two areas. When installing the monitor under narrow or tight POWER CAUTION! To prevent the risk of fire and shock hazard don´t expose...
  • Page 15 Choose electronically electr. transformer PIN 2 = PIN 2 = balanced input for balanced balanced PIN 3 = PIN 3 = optimized performance Fig. 2.2/2: The signal connectors in the middle of the rear panel of O 500 C Page 15...
  • Page 16 XLR output. This signal may for „transformer balanced input“. If the hum now be fed to a second O 500 C and the user problem still remains, PIN 3 on the XLR plug may select for the L or R channel from the should be disconnected (cut), and the digital data stream.
  • Page 17 Fig. 2.2/8: Connection of the O 500 C to a source with digital S/PDIF output. To connect a second O 500 C in the signal chain, either a T-adaptor for the BNC input can be used, or the signal to the second monitor can be taken from the digital output XLR socket.

  • Page 18: Vf-Display On The Front Baffle

    55 the menu step 8 Speaker Select will become active, the display will now show - The O 500 C now is ready to work, and even „Monitor/Subwoofer“. after switching OFF/ON all parameters that were set prior to switch-OFF are active again.

  • Page 19: Menu Structure And Concept Of Operation

    Operation The operation of the O 500 C digital controller is the „K + H O 500 C Main Menu“ headline will based on a special menu structure, where the appear in the VF-display of the O 500 C.
  • Page 20 This general description of the operation is valid for all menus. Remarks: The listing in the following chapters contains all menu points of the O 500 C software. The selected user security level affects the relevant menus, which can be displayed and modified (see system menu chapter 3.3, step 3).

  • Page 21: Main Menu

    O with the DOWN arrow key and then select In this menu the anaolog and/or digital input the desired characters or numbers by level will be changed. When the O 500 C is pressing the +/- increment keys. With the switched ON, this level will be automatically LEFT / RIGHT - arrow keys the cursor can recalled.
  • Page 22 When selecting the option „ON“ the gain of which depends on the selected loudspeaker the O 500 C power amps is reduced by 10 parameter setup. Based on that basic time dB. When operating the system at low the delaytime may be varied by max.

  • Page 23: System Menu

    (0...5) for operating pressing ENTER. Now the display will show the O 500 C. By hiding menupoints it is „unlocked“ and with the DOWN arrow key the possible to make adjustments and operation CHANGE PASSWORD page will be opened.

  • Page 24: Eq Menu

    ENTER key, the digital controller will boot like monitor. Now the password is set to the it does if you power-up the O 500 C. All default value 0000. Attention: This reset also settings and presets in the individual menus affects all the adjustments in the menus which remain active.
  • Page 25 2 Gain / EQ simply press the +/- increment keys until the The gain reduction to be made in this menu name of the desired setup appears in the is calculated upon the max. gain increase display. By pressing ENTER this preset will made in any frequency band which has been be instantly recalled.

  • Page 26: Infrared Remote Control

    10 dB. Pressing every O 500 C monitor. Even when ordering a again will return to the original volume. pair or a 5.1 system, every O 500 C will have it’s own remote control. All RC 55 are identical, it is Mute...

  • Page 27: Control Via Rs-232 Or Midi

    The MIDI-interface will allow for a simultaneous controlling of several O 500 C, so one adjustment The Sub-D socket on the rear of the O 500 C in a monitor will be routed to the other systems contains several interfaces of the internal digi- as well.
  • Page 28 Fig. 4.2/5 shows the wiring scheme of the The real advantage of a MIDI operation can be connecting cable between the O 500 C and a seen when two or more units are connected: personal computer for transferring parameter Here a daisychain-structure is built up, where settings, as described in chapter 6.2.
  • Page 29 Examples: Channel Mute Sub 0 = no, 1 = yes Channel Mute Low --- " --- The O 500 C is connected to the COM2 port of Channel Mute Mid --- " --- Channel Mute High --- " --- a PCs and the bin2syx software has been copied...

  • Page 30: Room Eq

    General interferences can hardly be determined, as their The parameter settings of the O 500 C have levels, phases and results are depending on been optimized by K + H in the way, that in a...
  • Page 31 Lifting the lower cut off frequency is High EQ recommendable in case there is a strong The high EQ will have influence on the level room mode, so cutting off the system below at higher frequencies, the adjustment ranges that frequency will cure that problem. It will from +1 dB to -4 dB: also serve to simulate the sound of a smaller monitor system.

  • Page 32: Parametric Eq (Peq)

    Here the basic mode of the individual EQ- In addition to the previously described local EQ, band is determined. the O 500 C is fitted with 10 fully parametric EQ The following options will be possible: bands, which can be selected to be either bell or shelving and highpass/lowpass character with o High shelving with 12 dB/Oct.
  • Page 33 examples for high- and low - shelving filter The example in the drawing shows and high- and lowpass filters with different highpasses with a number of corner slopes from the -3 dB corner frequencies 100 frequencies: Hz resp. 1 kHz. Q-factor (adjustment from 0...6355): Here the Q-factor of every filter band can be adjusted.
  • Page 34 Remarks fo adjustments The neccessary adjustments of the parametric EQ’s should be based on a correct measurement in the beginning. This measurement should not only be taken in the listening position, but also at a number of other positions in the listening area ( 10 to 15 are recommended ).

  • Page 35: Calculation Of Parameters

    EQ of the frequency now the transfer is completed. response for a better linearisation and a setup - Switch OFF the O 500 C and - after a few for the limiters. seconds - ON again, wait for the notice: The O 500 C is supplied with a complex „Wrong Filter Setup“...

  • Page 36: Technical Data

    7 Technical Data Acoustical Specification Freefield frequency response 30 Hz - 20 kHz, +/- 1,5 dB Self generated noise level at 10 cm distance 25 dB(A) < 0,5% in 1 m distance from 100 Hz @ 101 dB /SPL Sound Pressure Level ( SPL ) im halfroom 123,4 dB /SPL @ 1% THD averaged between 100 Hz und 6 kHz...
  • Page 37 RMS-Limiter Modelling of coil and magnet temperature Room specific filter settings see factory presets, needs individual lineup on site by K+H or subcontractor User defined equalizer Filter algorithm IIR-Filter (infinite impulse response) Number of filters per channel fullparametric filtertypes High-/Low-shelving 6dB/oct, 12dB/oct;...

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