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4

ROOM SUITABILITY

The Series MX systems are designed for 

dedicated home cinema rooms, rather than 

open plan living spaces.  They are capable 

of delivering sound pressure levels (SPL) 

equivalent to commercial cinemas and 

therefore are best installed in an enclosed 

room to avoid disturbing other occupants of 

the home.
Ambient light levels in the room should 

be fully controlled to maintain the best 

image contrast, as these speaker systems 

are intended to be used with a projector in 

conjunction with an acoustically transparent 

screen.  This is best achieved in an enclosed 

space with no windows or openings to other 

living spaces.
Room ratios are important. A rectangular 

room is usually the most suitable shape 

for a home cinema with the main speakers 

firing down the length of the room.  The slim 

design of the Series MX main speaker and 

subwoofer modules minimise the space 

required behind the screen and maximise the 

viewing distance in the home cinema (see 

section 5 - front wall construction for more 

details).
Due to the capability of higher SPL’s than 

typical home entertainment systems, it is 

recommended that allowances are made in 

the room design and construction for sound 

proofing  or  isolation.    Sound  isolation  is 

generally required to reduce or eliminate:
• 

extraneous  noises  (eg  traffic  noise  from 

the street outside or internal plumbing) 

entering the home cinema and disturbing 

the soft passages of the film or music.

•  excessive noise (particularly low 

frequencies) emanating from the home 

cinema and disturbing other members of 

the household or neighbours.

Sound  proofing  a  room  for  home  cinema 

use is best achieved during the construction 

phase of the building. It is also possible 

to  retrofit  an  existing  space  with  some 

additional effort. Attention should be paid 

to the thickness and density of the building 

materials that form the boundaries of the 

room (walls, ceiling and floor as applicable). 

Focusing on all the openings in the room, 

door seals, windows and air conditioning 

vents can greatly increase the effectiveness 

of room isolation at a moderate expense. 
It is best to work with an acoustic consultant 

to  determine  the  level  of  sound  proofing 

required to best suit your situation. 

Содержание MX20

Страница 1: ...SERIES MX INSTALLATION MANUAL ...

Страница 2: ...x CONTENTS 2 INTRODUCTION 3 ROOM SUITABILITY 4 ACOUSTIC CONSIDERATIONS 5 ROOM SIZE 6 AMPLIFICATION 7 SYSTEM DIMENSIONS 8 SYSTEM POSITIONING 9 SCREEN WALL CONSTRUCTION 10 SUBWOOFER SETUP AND CONFIGURATION 12 WIRING 13 EQUALISATION 14 ...

Страница 3: ...ry Both the infinite baffle wall and horn design technologies have been successfully combinedinourSeriesMXrangeofdedicated home cinema loudspeaker systems They are designed to be flush mounted into a false wall with an acoustically transparent screen placed over the front replicating the concept of a commercial cinema The Series MX modular systems feature the left centre and right screen loudspeak...

Страница 4: ...r more details Due to the capability of higher SPL s than typical home entertainment systems it is recommended that allowances are made in the room design and construction for sound proofing or isolation Sound isolation is generally required to reduce or eliminate extraneous noises eg traffic noise from the street outside or internal plumbing entering the home cinema and disturbing the soft passag...

Страница 5: ...d hard surfaces adjacent to the loudspeakers are not ideal Placing bass traps in appropriate positions within the home cinema can help to moderate bass response variations and will result in a more defined bass that is realistic particularly when listening to sound effects like gun shots or explosions It is highly recommended when designing a dedicated home cinema that you consult with an acoustic...

Страница 6: ...lly considered if the desired Dolby reference level is to be achieved The Series MX loudspeaker systems have been designed to suit a range of room sizes to best deliver a true cinematic experience Taking into account the average number of seats each room size can accommodate the table below illustrates the ideal room size range for each Series MX screen speaker system Note The Series MX system sho...

Страница 7: ...ne AV receiver Separate power amplifiers including ones with multiple channels have the capability to deliver more current and therefore produce the dynamics and impact desired for a true cinematic experience As the subwoofers in the Series MX systems are passive not self powered an independent power amplifier connected to the LFE channel s of the AV receiver processor is required to power these u...

Страница 8: ...stereo separation The tables in Figures 2 4 show the overall dimensions along with recommended cavity size for each MX system Use these dimensions as a guide to match up to your selected screen size Room Screen wall Cavity for MX system Room Screen wall MX system Screen System System Width System Height System Depth Cavity Width Cavity Height Cavity Depth MX20 2210 mm 1220 mm 295 mm 2260 mm 1270 m...

Страница 9: ...10 degrees of the listening axis of the speaker 500mm from base of speaker module For secondary viewing rows it is recommended to keep this angle within 20 degrees Care should also be taken to ensure the first row of viewers do not obstruct the sound path for viewers behind them Raising the platform height for subsequent rows can help to alleviate these issues System Spacer Width System Width Syst...

Страница 10: ...and alone screen wall This particular technique is outlined under the section Isolated from rear wall Fixed directly to rear wall Using this construction method the shelf studwork supporting the MX modules is fixed securely with construction adhesive in conjunction with screws or nails to the baffle wall and also to the rear wall of the adjoining room 1 Fix the cavity frame to the rear wall Figure...

Страница 11: ...s wall to the floor and the ceiling Figure 10 Where possible fill cavity with bulk insulation and then line the frame with plasterboard or other sheeting 2 Erect a frame for the screen wall and fix this to the floor ceiling and adjoining walls Figure 11 3 Fix noggins in between frames so that plasterboard or engineered timber board can be fixed Figure 12 At this point it is recommended to insulate...

Страница 12: ...ono configuration It is strongly recommended to run separate cabling for all channels in the MX modular loudspeaker system back to the central amplifier rack to permit future flexibility with the wiring configuration Outputs 1 INDIVIDUAL CHANNEL Stereo Power amplifier 2 8 Ohm load on the amplifier Outputs 1 BRIDGED PARALLEL Stereo Power amplifier 2 4 Ohm load on the amplifier Output 1 PARALLEL Mon...

Страница 13: ...e the use of high quality flexible multi stranded copper cables of suitable gauge are recommended for best performance For cable runs up to 10m in length a minimum 14AWG gauge cable should be specified for the main left main centre and main right loudspeakers and at least 12AWG cable for the subwoofers For longer cable runs consider using thicker cable If in doubt consult your Krix authorised deal...

Страница 14: ...riven on program peaks the use of an effective soft limiter will protect the loudspeaker driver against clipping damage and will also reduce the incidence of adverse distortion when the amplifier is faced with signals in excess of its peak rating High pass filter The MX subwoofer can benefit from the use of an appropriately selected high pass filter By filtering out the subsonic frequencies the ov...

Страница 15: ...hich can sound too bright forward and harsh in an average home cinema environment Some also pull too much energy out of the mid bass region resulting in a thin sounding system that lacks warmth and weight Listen for these issues when evaluating the results of an automated room correction system Manual Graphic Equalisation Manual graphic equalisation allows for a gentler equalisation curve to be ap...

Страница 16: ...krix com Krix Loudspeakers Pty Ltd 14 Chapman Road Hackham SA 5163 Australia T 61 8 8384 3433 F 61 8 8384 3419 listen krix com Rev 01 ...

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