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Summary of Contents for MK Sound LFE-4
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Page 1: Operation Manual
LFE-4 Miller & Kreisel Sound, Inc. 9351 Deering Avenue Chatsworth, CA 91311-5858 USA (818) 701-7010 fax (818) 701-0369 www.mkprofessional.com ©2003 Miller & Kreisel Sound, Inc. -
Page 2: Table Of Contents
Bass Management Controller SAFETY PRECAUTIONS...3 M&K’S DESIGN PHILOSOPHY...4 THE LOGIC OF BASS MANAGEMENT, OBSERVATIONS BY KEN KREISEL...4 INTRODUCTION...5 INPUT AND OUTPUT CONNECTOR WIRING...7 GENERAL CONNECTION GUIDELINES...7 GROUNDING...7 CONNECTING FOR STEREO...8 CONNECTING FOR DOLBY DIGITAL...9 CONNECTING FOR DTS...10 CALIBRATING YOUR M&K PROFESSIONAL SYSTEM...11 THE M&K PROFESSIONAL TEST DISC...11 SPEAKER PLACEMENT...12 ITU-R BS.775.1 RECOMMENDATION...12... -
Page 3: Safety Instructions
Bass Management Controller The exclamation point within an equilateral triangle is intended to TO PREVENT THE RISK OF ELECTRIC SHOCK, alert the user of the presence of DO NOT REMOVE COVER (OR BACK). NO USER- important operating and mainte- SERVICEABLE PARTS INSIDE. REFER SERVIC- nance (servicing) instructions in the literature accompanying the ING TO QUALIFIED SERVICE PERSONNEL. -
Page 4: M&K's Design Philosophy
Bass Management Controller M&K’S DESIGN PHILOSOPHY Our philosophy is that exciting and lifelike sound and music reproduction takes place when your ears, in effect, become the recording microphones. Our speakers are designed to allow you to hear exactly what the microphones heard, placing you as close or as far away from the music or sound source as the recording engineer placed the microphones. -
Page 5: Introduction
The LFE-4 Bass Management Controller is a balanced, line-level studio bass management controller which is intended for use with the M&K line of professional studio monitors. Although the LFE-4 was primarily designed for monitoring 5.1 audio, its flexible architecture allows it to be used for monitoring mono, stereo, Dolby Surround, Dolby Digital, DTS and other formats. - Page 6 Bass Management Controller The LFE-4 consists of a series of five high-pass filters (one each for the L, C, R, LS, LR channels) that route high frequency information (above 80Hz) to their appropriate channel’s amplifier and speaker monitor. Each channel is also routed through a matching 80Hz low-pass filter. This low frequency information is then routed to a summing amplifier, which in turn sends this low frequency information, along with the LFE channel, to two dual subwoofer outputs.
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Page 7: Figure 3 Grounding
LFE-4 to your amplifier to under a hundred and fifty feet. GROUNDING The LFE-4 was designed so as not to add noise to an already clean system. To eliminate the possibility of the extra safety ground introducing ground loop hum, the LFE-4 uses an external double-insulated UL approved power transformer that does not require a safety ground. -
Page 8: Connecting For Stereo
5. Locate the external power supply for the LFE-4 and plug it into the 4 pin power connector on the back of the LFE-4. Secure it in place by turning the outer ring clockwise. Plug the external power supply into a power outlet. -
Page 9: Figure 5 Dolby Digital 5.1 Connections
6. Locate the external power supply for the LFE-4 and plug it into the 4 pin power connector on the back of the LFE-4. Secure it in place by turning the outer ring clockwise. Plug the external power supply into a power outlet. -
Page 10: Figure 6 Dts 5.1 Connections
LFE-4. 4. Connect one of the subwoofer outputs of the LFE-4 to the XLR input of your subwoofer. Set your M&K Professional subwoofer as follows: set the filter switch to THX, set the phase switch to plus and set the gain switch to the THX position. -
Page 11: Calibrating Your M&K Professional System
6. Locate the external power supply for the LFE-4 and plug it into the 4 pin power connector on the back of the LFE-4. Secure it in place by turning the outer ring clockwise. Plug the external power supply into a power outlet. -
Page 12: Figure 7 Itu-R Bs.775-1 Speaker Placement
Bass Management Controller Track three: 1 kHz sine wave recorded at –20dB FSD. Use this to set the reference level of your source (console, etc.) On an analog console this will be 0VU. On digital sources this will be either –20dB FSD or –18dB FSD. -
Page 13: Subwoofer Placement
Bass Management Controller The speakers should be placed so that the tweeters are directly in line with the listener’s ears, that is, on-axis. (M&K pow- ered speakers have a red LED recessed into the front baffle. The listener will know when his speakers are on-axis when he can see this LED. -
Page 14: Speaker Calibration
85dB standard.) (NOTE 1: If you are using a Martinsound MultiMax, connect the LFE-4 to the output of the MultiMax and disengage the Cinema low-end reinforcement program on the MultiMax as this program is not a bass management system.) -
Page 15: Specifications
Bass Management Controller LFE-4 SPECIFICATIONS All outputs have a +/- 12dB trim control for balancing the system . LCR and Surround channels: Input Impedance: Output Impedance: High pass filter: Nominal input level: Maximum recommended input level: Output clipping level: Gain Adjustment:... - Page 16 LFE-4 manual PN # 70360 7/08/2003 rev.1 pt/qrk...
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