Miles Technology Multisonic M44 Operation Manual Download Page 7

1    Multisonic Imaging

3

Benefits

The Miles Technology M86 Multisonic

®

 Imager will

benefit a sound system in many ways:

Multisonic

®

 Imaging

With patented Multisonic™ Imaging, the “sweet

spot” is enlarged to practically the 

whole room

,

allowing an entire audience to simultaneously

hear great stereo sound.
Designed For Professional Stereo

The M86 is designed for auditoriums, theaters,

sanctuaries, nightclubs, A/V systems, corporate

boardrooms, studios, touring systems, DJ

systems, multimedia rooms, commercial and

home theater, home audio, post production, and

many other types of installed and portable

sound systems.
Compatible With All Program Sources

The Multisonic Imager works perfectly with all

program material, including compact discs, 

tapes, video, stereo-surround audio or video

programming, broadcast, and live signal

sources. It perfectly accommodates separate

signal feeds for center or surround channels,

using the balanced discrete-input connections.
Balanced Inputs and Outputs

All inputs and outputs include balanced

connections for maximum signal integrity.
Discrete 5.1 RCA Inputs

This input connection accommodates a DVD

player (which has analog outputs) for

convenient integration into a 5.1 system. A

separate level control is provided for this input

to balance the system.
5.1-to Multisonic Switch

Most DVD’s, with discrete center (and certainly

those without), will benefit greatly with

Multisonic Imaging. With this function, the

sound will be an optimum combination of

discrete 5.1 and Multisonic imaging.
Additional RCA Inputs

Three stereo pairs of RCA input connections

are provided in addition to the balanced XLR

inputs. These are for additional input sources.

All of the stereo inputs are mixed together so

that whichever device is active will be heard

without any user intervention.

Subwoofer Crossover and Bass

Management

The built-in fourth-order Linkwitz-Riley

crossover filters provide an optimized

subwoofer output derived from all sources,

including 2.0 (two-channel stereo), 5.1, 5.0, 4.0,

etc. Switchable high-pass filters allow

optimization of the main loudspeakers’ bass

performance also.
Discrete Center and Subwoofer Inputs

These balanced inputs allow optimum use of

the center and subwoofer channels with specific

input sources during live productions.
Cleaner and More Dynamic Sound

Using three instead of two loudspeaker and

amplifier channels, the sound is much cleaner

with less distortion and more headroom. For the

same resulting sound level

 each loudspeaker

operates at 

a lower power

 and 

lower distortion

level

.

Superior To Discrete L-C-R Systems

Loudspeaker coverage limitations often prevent

full-width soundstaging with discrete L-C-R

systems because listeners at one side of the

room may be unable to hear the loudspeaker on

the opposite side. The M86 solves this, allowing

more flexibility for the mix engineer.

In addition, it properly presents two-channel

stereo signal sources with the sound system.
SpreadSound™ Surround Outputs

These outputs provide the 

cleanest possible

stereo surround signal derived from stereo

sources; it is much more natural than digital-

delay or decorrelation methods.
Simple and Precise Setup

The task of balancing all the levels in a multi-

channel system is simplified and the guesswork

is removed. Setup is very quick with any signal

source.
No Distortion

Multisonic Imaging is a completely high-fidelity

process; it does not add harmonic, frequency,

phase, or dynamic distortion. There is no

“steering,” and there are no unnatural digital

artifacts or other side effects typical of other

multichannel decoders. From a signal-quality

standpoint, the Multisonic Imager is transparent.

 

Summary of Contents for Multisonic M44

Page 1: ...Miles Technology Inc Niles Michigan USA M44 Multisonic Imager M86 Multisonic Imager Operation Manual...

Page 2: ...Miles Technology Inc Niles Michigan USA...

Page 3: ...as the most demanding professional applications 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 disc...

Page 4: ...cific processing 4 Generally the loudspeakers and amplifier gains of left center and right are to be matched An unmatched center loudspeaker can be accommodated also in this case the gain setting may...

Page 5: ...ation Equipment Selection 14 External Signal Processing 15 Mono Output 16 Delayed Loudspeakers 16 Room Acoustics 17 Loudspeaker Placement 17 Using An Unmatched Center Loudspeaker 19 System Interconnec...

Page 6: ...ing reproduces center panned sound sources within the mix such as lead vocals and kick drums in the center These center panned sound source locations will be heard in the center no matter where the li...

Page 7: ...at whichever device is active will be heard without any user intervention Subwoofer Crossover and Bass Management The built in fourth order Linkwitz Riley crossover filters provide an optimized subwoo...

Page 8: ...stage Adjustable Or Actual Mix The relative levels of center and side panned sounds in a stereo mix can easily be adjusted with the C S Image Balance control making the sound distribution perfectly ev...

Page 9: ...e direction at a time resulting in frequent sound staging compromises In addition the Multisonic system provides superior playback with all audio program sources Portable Sound Systems A Multisonic sy...

Page 10: ...s integral to the Multisonic circuit It allows adjustment of the matrix parameters which control the relative levels and effective width of the stereo sound stage This allows compensation for any vari...

Page 11: ...r the Multisonic Imaging conversion process This control can be set and left in the center position for general applications or used for fine tuning the imaging performance with different sources High...

Page 12: ...e send level of the derived surround signal for convenient balancing of the derived surround with the front loudspeakers Once this control is set the derived surround signal will track the source leve...

Page 13: ...Indicators Each output control has an associated two light level display which shows the actual output level The green light indicates the presence of signal above 20 dBu 80 mV The red light indicate...

Page 14: ...an external source such as a mixing console channel or subgroup output which is to be routed directly to the subwoofer in the sound system This is useful for live production applications which include...

Page 15: ...ce Outputs Left Center Right and Subwoofer XLR connectors balanced 26 dBu maximum output into 1200 ohms 100 ohms differential output impedance Left Surround Right Surround M86 only XLR connectors bala...

Page 16: ...2 The Multisonic Imager 12 Fig 7 M86 Internal Block Diagram...

Page 17: ...2 The Multisonic Imager 13 Fig 8 M44 Internal Block Diagram...

Page 18: ...ty is usually the primary concern for loudspeaker selection In general one ought to use the best sounding loudspeakers available within the sound system budget However another critical parameter espec...

Page 19: ...o be immediately after the M86 Equalization Program equalization such as one might use to optimize or correct the sound of recorded program material is normally placed right after the signal source eq...

Page 20: ...ut disrupting the sound staging The amount of delay is set so that the sound from the main system arrives at the listener just before the delayed sound usually by about 15 to 30 ms This helps to retai...

Page 21: ...y listener can hear each of them Large venues may require loudspeaker clusters with appropriate dispersion performance designed to cover the entire audience from each of the three locations In medium...

Page 22: ...shows a more extreme example where a thrust stage requires the center loudspeaker to be placed closer to the central audience than the left and right loudspeakers Also the left and right loudspeakers...

Page 23: ...nt type of center loudspeaker While the theoretical principles of stereo imaging are based upon matched sound sources good imaging still can be achieved with an unmatched center loudspeaker If an unma...

Page 24: ...ROUND CONNECTION ON ANY POWER CORD Unbalanced Connections The M44 and M86 XLR inputs can accept either balanced or unbalanced signals Connect the signal source to pin 2 and or ground to pin 3 The outp...

Page 25: ...ation The loudspeakers should be identical or at least have the same sensitivity and frequency response Since the center loudspeaker has no independent gain control or signal path it should match the...

Page 26: ...fier gain set for audibly matched loudspeaker output This is easily accomplished using the Setup switch on the M44 or M86 Here is the basic procedure 1 Set the center amplifier gain at an appropriate...

Page 27: ...level should be correct To adjust for individual program variations the Surround Output level control is used for 5 1 sources Either the Surround Output level control or the Stereo Input Surround lev...

Page 28: ...Image Balance control fully clockwise to Diff and then adjust the surround level so that a surround effect is realized which is balanced from front to back A stereo program source is necessary for thi...

Page 29: ...itor system even while generating a stereo mix In this case the resulting stereo output is the signal connected to the input of the Multisonic Imager The Imager is used just for monitoring When mixing...

Page 30: ...y when the Surround Output Level control is turned down If so then the program source is probably noisy Also be sure you have a stereo source there will be no surround signal with a mono source Turnin...

Page 31: ...from to S may be helpful also Check that the center loudspeaker is correctly connected The polarity of all signals must be correct Use the setup procedure to verify correct left center and right cente...

Page 32: ...even coverage If the center loudspeaker does not match it will be helpful to use an equalizer for the center channel adjust it for the best possible frequency response match with the side loudspeakers...

Page 33: ...probably caused by intense signal processing Multisonic Imaging will reproduce this effect exactly 6 Product Support Warranty All Miles Technology products are warranted against malfunction due to mat...

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