User manual MK SOUND ELECTRONICS

[. . . ] RETAIN INSTRUCTIONS - The safety and operating instructions should be retained for future reference. HEED WARNINGS - All warnings on this product and in the operating instructions should be adhered to. FOLLOW INSTRUCTIONS - All operating and use instructions should be followed. [. . . ] ·If liquid has been spilled, or objects have fallen into this product. ·If the product does not operate normally by following the operating instructions. Adjust only controls that are covered by the operating instructions as an improper adjustment of other controls may result in damage and will often require extensive work by a qualified technician to restore the product to its normal operation. ·When the product exhibits a distinct change in performance - this indicates a need for service. REPLACEMENT PARTS - When replacement parts are required be sure the service technician has used replacement part specified by the manufacturer or have the same characteristics as the original part. Unauthorized substitutions may result in risk of fire, electric shock, or other hazard. SAFETY CHECK - Upon completion of any service or repairs to this product, ask the service technician to perform safety checks to determine that the product is in proper operating condition. HEAT - This product should be situated away from heat sources such as radiators, heat registers, stoves, or other products (including amplifiers) that produce heat. 2. INTRODUCTION The M&K BMC Mini Bass Management Controller provides complete bass management, allowing for the proper integration of a subwoofer into any system configuration from mono through 2 channel stereo to full 5. 1 channel monitoring. The BMC MINI accepts inputs from 5 full-range channels and a limited-bandwidth LFE subwoofer channel and redirects the bass content of the main channels (low-pass filtered at 80 Hz) plus the LFE channel to one or more subwoofers. To the five main channels, it delivers a signal high-pass filtered at 80 Hz. 3. WHY BASS MANAGEMENT IS NEEDED Engineers mixing multi-channel audio (2 channel stereo, Dolby Surround, 5. 1 Dolby Digital, DTS, and other surround-sound formats) are faced with numerous challenges when trying to accurately monitor complex and dynamic material, and determine how BASS MANAGEMENT CONTROLLER this material will sound in its intended playback space. These issues include reproducing up to 5 or more channels of full range audio, plus an optional Low Frequency Effects channel (LFE), all of which have a bandwidth to 10Hz or below, with very high dynamic range, and achieving consistent bass response from all the channels throughout the control room monitoring area. Due to unavoidable room modes, five or more correctly placed full range speakers, (in even the most perfectly designed studio) will produce dramatically different low frequency characteristics at the mix position. When the bass from all the channels is redirected into a single, PROPERLY placed subwoofer, then each and all of the multiple channels exhibits the identical bass response at the listening position, and gives surprisingly even coverage in virtually every control room. By combining a carefully designed low frequency acoustic rolloff of all the main speakers, including the surrounds, and a matching 2nd order electronic filter in the M&K Bass Management Controller, M&K achieves all the theoretical benefits of a 4th order Linkwitz-Riley filter. In addition, to further create a seamless bass managed system, we use only non-ported sealed cabinet designs on all our speakers and subwoofers, eliminating ported speaker phase anomalies which would prohibit smooth transitions at the bass managed crossover frequency. Another good reason for using bass management in the control room is that even the least expensive Dolby Digital consumer decoder, found in millions of homes, has bass management built in, allowing the bass from all channels to be fed to a single subwoofer. [. . . ] For proper playback of DVD-Audio discs, the BMC MINI is necessary to insure that the bass content of all channels is properly fed to the subwoofer. When using the BMC MINI with a DVD-Audio player, the BMC MINI should be connected between the DVD-A player and the receiver/processor, see figure 4. Make sure that you connect the LFE output of the DVD-Audio player to the "LFE IN +0 dB" input on the BMC MINI. [. . . ]