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MK Sound LFE-4 - page 1
LFE-4 Miller & Kreisel Sound, Inc. 9351 Deering A venue Chatsworth, CA 91311-5858 USA (818) 701-7010 fax (818) 701-0369 www .mk professional.com ©2003 Miller & Kreisel Sound, Inc. bass management operation manual ...
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MK Sound LFE-4 - page 2
Please record the f ollowing inf ormation for y our records: Serial Number : Date of Purchase: Dealer Name: Dealer Address: City/State/Zip: Countr y: Inv oice Number: Bass Management Controller T ABLE OF CONTENTS 1. SAFETY PRECA UTIONS..........................................................................................................3 2. M&am ...
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MK Sound LFE-4 - page 3
1. SAFETY INSTRUCTIONS 1. READ INSTRUCTIONS - All safety and oper ating instructions should be read before this product is operated. 2. RET AIN INSTRUCTIONS - The saf ety and operating instructions should be retained f or future reference . 3. HEED W ARNINGS - All warnings on this product and in the operating instructions should be adhered to. 4. F ...
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MK Sound LFE-4 - page 4
2. M&K’S DESIGN PHILOSOPHY Our philosoph y is that e xciting and lifelik e sound and m usic reproduction tak es place when y our ears , in eff ect, become the recording microphones. Our speakers are designed to allo w you to hear e xactly what the microphones heard, placing you as close or as f ar awa y from the music or sound source as the r ...
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MK Sound LFE-4 - page 5
By combining a carefully designed low frequency acoustic rolloff of all the main speak ers, including the surrounds, and a matching 2nd order electronic filter in the M&K Bass Management Controller , M&K achiev es all the theoretical benefits of a 4th order Linkwitz-Riley filter . In addition, to fur ther create a seamless bass managed syst ...
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MK Sound LFE-4 - page 6
The LFE-4 consists of a series of five high-pass filters (one each f or the L, C , R, LS , LR channels) that route high frequency inf ormation (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 inf or mation is then routed to a summi ...
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MK Sound LFE-4 - page 7
Input and Output Connector Wiring The XLR connectors on the LFE-4 are wired as f ollows: Pin 3: Minus Pin 2: Plus Pin 1: Ground General Connection Guidelines T o a v oid loud transients that ma y damage y our speakers and hurt your ears, turn off your pow er amplifiers bef ore connecting or disconnecting any cab les or the pow er supply on the LFE- ...
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MK Sound LFE-4 - page 8
6. CONNECTING FOR STEREO 1. Connect the left and right outputs of y our mix er to the left and right input channels of the LFE-4. 2. Connect the left and right outputs of LFE-4 to the inputs of y our power amplifiers or directly to y our powered loudspeak ers . 3. Connect one of the subw oof er outputs of the LFE-4 to the XLR input of your subw oof ...
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MK Sound LFE-4 - page 9
7. CONNECTING FOR DOLBY DIGIT AL 1. Connect the left, center , right, left surround and r ight surround outputs of your mix er to the left, center , right, left surround and right surround input channels of the LFE-4. 2. Connect the outputs of LFE-4 to the inputs of y our po wer amplifiers or directly to y our powered loudspeakers . 3. Connect the ...
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MK Sound LFE-4 - page 10
(Note: In order to gain an extra 10dB of headroom on the lo w frequency eff ects (LFE) channel, Dolb y specifies that this channel be recorded 10dB lower than the 5 main channels . This 10dB low er le v el is made up in the pla yback chain to restore the correct 5 channel to .1 channel balance . For additional inf or mation please see the "Dol ...
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MK Sound LFE-4 - page 11
5. If y ou are using passiv e speak ers with e xter nal amplifiers, connect y our speaker system to the power amplifiers . 6. Locate the e xter nal power supply f or the LFE-4 and plug it into the 4 pin power connector on the bac k of the LFE-4. Secure it in place by turning the outer r ing clockwise . Plug the e xter nal power supply into a power ...
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MK Sound LFE-4 - page 12
T rac k three: 1 kHz sine wav e recorded at – 20dB FSD . Use this to set the reference le v el of y our source (console, etc.) On an analog console this will be 0VU . On digital sources this will be either – 20dB FSD or – 18dB FSD . 10. SPEAKER PLA CEMENT There is considerab le debate within the prof essional audio community as to the best sp ...
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MK Sound LFE-4 - page 13
The speakers should be placed so that the tw eeters are directly in line with the listener ’ s ears, that is, on-axis . (M&K pow- ered speakers ha v e a red LED recessed into the front baffle. The listener will know when his speak ers are on-axis when he can see this LED . If this LED is not visible , either the speak er is turned-off or the ...
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MK Sound LFE-4 - page 14
13. SPEAKER CALIBRA TION 1. Y our speak ers should now be in their final positions . 2. Remo v e all EQ and signal processing from the monitor path. 3. T ur n all volume controls in the signal chain to their “ reference le v el ” position. These v olume controls include the console main monitor pot, submaster f aders and power amplifier v olume ...
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MK Sound LFE-4 - page 15
15. LFE-4 SPECIFICA TIONS All outputs hav e a +/- 12dB trim control f or balancing the system . LCR and Surround channels: Input Impedance: 20K ohm balanced Output Impedance: 200 ohms balanced High pass filter : 80Hz- 12 dB/octav e Nominal input le vel: +4 dBu Maximum recommended input le v el: +24 dBu Output clipping le vel: +27 dBu Gain Adjustmen ...
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MK Sound LFE-4 - page 16
LFE-4 manual PN # 70360 7/08/2003 rev .1 pt/qrk ...
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