Summary of Contents for Miles Technology Multisonic M44
- Page 1 ® M44 Multisonic Imager ® M86 Multisonic Imager Oper ation Manual Miles T echnology Inc. • N iles, Michigan • U SA...
- Page 2 Miles T echnology Inc. • N iles, Michigan • U SA...
- Page 3 In addition to its Multisonic Imaging function, the M44 and M86 include a subwoofer output and subwoofer crossover filters for all inputs, as well as discrete center and subwoofer inputs for live productions.
- Page 4 M44 and M86 Multisonic Imager Operation Manual M44 and M86 Quick Start Instructions Use the Setup function to adjust the If possible save the box, packing, and amplifier gains: your Authorized Dealer sales receipt, which validates the warranty period if it Start with all output level controls on starts later than the date of manufacture.
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Page 5: Table Of Contents
M44 Block Diagram ........ -
Page 6: Multisonic Imaging
Description Conversely, side-panned sounds radiate unmasked ® The Miles Technology Multisonic Imaging System from the side loudspeakers. The spatial separation greatly enhances the acoustic sound quality of all reveals nuances which can be lost in conventional stereo program sources using three loudspeakers setups. -
Page 7: Benefits
Multisonic Imaging Benefits ® The Miles Technology M86 Multisonic Imager will benefit a sound system in many ways: Subwoofer Crossover and Bass ® Multisonic Imaging Management With patented Multisonic™ Imaging, the “sweet The built-in fourth-order Linkwitz-Riley spot” is enlarged to practically the whole room,... - Page 8 Solid Warranty Clarity Through Separation Every Miles Technology product is made in the The separation of sound into three channels U.S.A. and is fully guaranteed for three years to brings a large reduction in loudspeaker operate as intended and specified.
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Page 9: Applications
There are many applications that can benefit from systems, increasing coverage area and providing a ® the use of Miles Technology's Multisonic Imaging: "bigger" sound. The low cost and small size of the Multisonic Imager truly improves the performance Auditoriums and Performing Arts Centers: The quality of any portable audio setup. -
Page 10: The Multisonic Imager
It is always exactly correct. Stereo Inputs This concept, combined with vector-sum acoustic The primary function of the M44 and M86 is to imaging—the process which creates a phantom convert a standard stereo input signal, with left and... -
Page 11: Multisonic Control
5.1 signal level). The portion of the surround output mix which is the derived The M44 and M86 both include the C/S Image Spreadsound signal from the stereo inputs is Balance control which sets the parameters for the controlled by the Surround level control on the Multisonic Imaging conversion process. -
Page 12: Control Functions
Control Functions: Front Panel level and should not need further adjustment unless the derived surround channels are to be enhanced Refer to Figure 3 (M86) or 4 (M44). or attenuated. The signal at the Discrete Surround 1. Stereo Input LEVEL control: Adjusts the Input is not affected by this control. - Page 13 15. POWER indicator: Indicates when ac power is shows the actual output level. The green light applied to the unit. indicates the presence of signal above -20 dBu (80 Fig. 5 M86 Back Panel Fig. 6 M44 Back Panel...
- Page 14 Control Functions: Back Panel live-production applications which include sub-bass effects, and it’s desired to mix them only into the Refer to Figure 5 for M86 or Figure 6 for M44. subwoofer loudspeakers. 1. AC Input Power: This is for connection to the ac 5.
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Page 15: Specifications
+11 dBu maximum input level, 8,500 ohms The block diagram of the M86 is shown in Figure 7, input impedance. and the block diagram for the M44 is shown in Figure 8. This shows the internal signal path routing Outputs... -
Page 16: M86 Block Diagram
Fig. 7 M86 Internal Block Diagram... -
Page 17: M44 Block Diagram
Fig. 8 M44 Internal Block Diagram... -
Page 18: Installation
The following basic equipment is needed: a wide audience, the center loudspeaker may need to be different since it must have a wider coverage 1. An M86 or M44 Multisonic Imager to provide the angle. electronic spatial signal separation. If surround... -
Page 19: External Signal Processing
Installation External Signal Processing General Concept The Multisonic Imaging System is easily implemented with various types of signal processing equipment. The number of channels needed depends on the specific application. Figure 9 shows a typical signal processing sequence for most applications. -
Page 20: Mono Output
Installation loudspeaker (after the Imager). Each loudspeaker without disrupting the sound staging. The amount of system can be equalized independently. This is delay is set so that the sound from the main system applicable for clusters, multi-way systems, and arrives at the listener just before the delayed sound, unmatched center loudspeakers. -
Page 21: Room Acoustics
Installation Room Acoustics mix, with some degree of sound staging across the loudspeakers which they can hear. The optimum achievable quality of stereo imaging is very dependent on the room acoustics. Generally, General Placement Concept the deader the room, the better the imaging. Live The basic concept for loudspeaker placement is rooms provide their own ambience which can be shown in Figure 10. - Page 22 Installation the maximum listening area with best possible loudspeaker needs to be located more in line with imaging while keeping the center loudspeaker from the left and right as shown in Figure 12. In this being too far away. This is a goal; in practice, there case, the center loudspeaker is typically higher than is quite a bit of flexibility in the exact placement.
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Page 23: Using An Unmatched Center Loudspeaker
Installation level to compensate for the increased distance to still can be achieved with an unmatched center the listeners. loudspeaker. If an unmatched center loudspeaker is used, special The Center Loudspeaker consideration of its equalization and gain can improve the imaging capability. The center loudspeaker should be equidistant from the left and right loudspeakers. -
Page 24: System Interconnection
For electrical safety, be certain that the pin 2: signal + unit is correctly grounded when plugged in. pin 3: signal - The M44 or M86 may be left on indefinitely. Only a RCA Input Connection small amount of power is used. tip: signal +... -
Page 25: Bridged Center Loudspeaker Connection
(left/right) the right positive amplifier output, as shown in signal sources. Three loudspeakers (left, center, Figure 15. The M44 or M86 Center output is not and right) are driven with a single two-channel used. -
Page 26: Setup Adjustment Procedure
Although the description here is quite detailed, this 2. Press in the LC Setup switch on the M44/M86. procedure is really very simple, and often can be 3. Play some program material through the system. -
Page 27: Multisonic Imager Operation
A1-A8 above. Input Level Control Operation The Stereo Input Level control on the M44 or M86 Setup Adjustment of the Surround Level affects the overall gain of the stereo input signals to With the M86 Surround Output level control and the all of the outputs. -
Page 28: Multisonic Mixing
M86 Operation surround level so that a surround effect is realized Many recordings are recorded with a somewhat- which is balanced from front to back. A stereo narrow sound stage. This studio mixing approach program source is necessary for this. From the provides more consistency for monophonic center of the listening area, the left, right, and reproduction. -
Page 29: Vocal Cancellation
Another method which can be used on the M44 is to desired. set the C/S Image Balance control to ‘Diff’ and use... -
Page 30: Troubleshooting Guide
Troubleshooting Guide 5 Troubleshooting Guide System Problems Check if the Power indicator is on. If not, check the power No output supply connection and make sure the ac outlet is on. If the Power indicator is on, then check the Level controls and all input and output connections. -
Page 31: Imaging
Troubleshooting Guide near a power amplifier or any big power transformer. Try increasing the distance to any nearby power equipment. Sometimes RFI can induce hum in the system. This could result from a nearby transmitter or a lamp dimmer on the ac line. If proper grounding technique does not solve this, then an RF filter for the ac line (such as Radio Shack 15-1111 for moderate suppression) might be helpful. - Page 32 Troubleshooting Guide Check the program source for channel balance. This symptom Balance is off; sound is is usually caused by an unbalance in the source. Compare with lopsided Mono source material. Make sure the amplifier gains are set correctly with the setup procedure. Verify the polarities of the loudspeakers.
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Page 33: Sound Quality
The above exclusions may not apply to you. Repair by other than Miles Technology will void this warranty. In the event of a warranty claim, call for return information and authorization.
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