Instruction/ maintenance manual of the product LFE-4 MK Sound
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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.
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................
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.
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.
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 .
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 .
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 dama.
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 .
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 .
(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 .
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 .
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 .
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 .
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.
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 pa.
LFE-4 manual PN # 70360 7/08/2003 rev .1 pt/qrk.
An important point after buying a device MK Sound LFE-4 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought MK Sound LFE-4 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data MK Sound LFE-4 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, MK Sound LFE-4 you will learn all the available features of the product, as well as information on its operation. The information that you get MK Sound LFE-4 will certainly help you make a decision on the purchase.
If you already are a holder of MK Sound LFE-4, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime MK Sound LFE-4.
However, one of the most important roles played by the user manual is to help in solving problems with MK Sound LFE-4. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device MK Sound LFE-4 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
