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Optimal Audio Cuboid 10, User Manual

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Horizontal coverage

It is important to consider the dispersion angles, or coverage, of each 
loudspeaker, and ensure that at the point at which you are at the extreme of the 
loudspeaker’s horizontal coverage angle, you are overlapping with that from 
another loudspeaker, to prevent “dead spots”, areas where the high frequency 

sounds from the loudspeaker drop more than 3dB below those on axis of the 
loudspeaker. This would reduce the speech intelligibility and the clarity of music 
reproduction. 

For Cuboid 8 and upwards, the 
horizontal dispersion is narrower, and the 
loudspeakers will necessarily be placed 
closer together, or further away from the 
listeners for seamless horizontal coverage.

Cuboid 3 horizontal coverage 

2 x Cuboid 3 positioned to overlap horizontal coverage

Cuboid 3 

Cuboid 3 

Cuboid 3 

15/23

Cuboid

Loudspeakers

Loudspeakers

USER GUIDE

© 2022. Optimal Audio Group Ltd. (v2.2)

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Introduction

Aiming/

coverage

Overview

Horizontal 

coverage

Wall mount

Connecting up

Ceiling mount

Matching 

speakers/amps

Grille removal

Accessories

Badge rotation

Specifications

Coverage

Horn rotation

Safety info

Summary of Contents for Cuboid 10

Page 1: ...Loudspeakers Cuboid Loudspeakers USER GUIDE ...

Page 2: ...imal Audio eco system Cuboid will surprise you with its performance even coverage and professional aesthetic This Quick Start Guide will help you get your loudspeakers rigged positioned and connected correctly Congratulations on your choice of Optimal Audio for your latest sound system installation 2 23 Cuboid Loudspeakers Loudspeakers USER GUIDE 2022 Optimal Audio Group Ltd v2 2 Introduction Aimi...

Page 3: ...ing increased efficiency and directivity and a low frequency cone driver The loudspeaker is fed with a full range output from an amplifier and an internal electronic cross over network divides the signal between the high and low frequency drivers Cuboid loudspeakers 3 23 Cuboid Loudspeakers Loudspeakers USER GUIDE 2022 Optimal Audio Group Ltd v2 2 Introduction Aiming coverage Overview Horizontal c...

Page 4: ...ed M5 bolt and steel wire rope in the case of the Cuboid 3 3TX 5 and 5TX Cuboid model Wall bracket Combined weight U bracket Combined weight Eyebolt fitting Cuboid 3 included 1 39kg 3 06lbs N A N A M5 x 1 Cuboid 3TX included 1 77kg 3 9lbs N A N A M5 x 1 Cuboid 5 included 2 28kg 5 02lbs N A N A M5 x 1 Cuboid 5TX included 2 66kg 4 98lbs N A N A M5 x 1 Cuboid 8 A 10 64kg 23 45lbs A 13 0kg 28 66lbs M8...

Page 5: ...e supplied 4mm hex wrench Use the supplied 3mm hex wrench to fix the loudspeaker to the bracket Once the wall mounting part is fixed attach the loudspeaker part of the bracket to the mounting points on the back of Cuboid 3 3TX 5 and 5TX Attach the loudspeaker and bracket assembly to the wall mount and tighten in the desired orientation Wall mounting Cuboid 3 3TX 5 and 5TX Portrait or landscape 5 2...

Page 6: ...tional wall bracket mounting positions enable greater down tilt using the lower four M8 bolt position or the loudspeaker can be mounted in landscape mode by rotating the bracket as shown he loudspeaker to the bracket Wall mounting Cuboid 8 10 12 and 15 Portrait or landscape 6 23 Cuboid Loudspeakers Loudspeakers USER GUIDE 2022 Optimal Audio Group Ltd v2 2 Introduction Aiming coverage Overview Hori...

Page 7: ... Horizontal Fixings Vertical Fixing Grub Screw Grub screw Wall mounting Cuboid 8 10 12 and 15 Portrait or landscape Once the loudspeaker is in position and you are happy with the angle adjustments tighten all fixings as shown to lock the cabinet in place 7 23 Cuboid Loudspeakers Loudspeakers USER GUIDE 2022 Optimal Audio Group Ltd v2 2 Introduction Aiming coverage Overview Horizontal coverage Wall...

Page 8: ...alance volume levels around a room make sure that the total power of the circuit does not exceed the capability of the amplifier channel driving that circuit For outdoor use a weatherproof connector cover with cable glands can be purchased as an accessory to ensure no water ingress to the loudspeaker terminals Be sure to select a gauge of cable with a maximum outside diameter of 6 8mm to ensure it...

Page 9: ...ver the loudspeaker and line up the holes with the centre M8 bolt hole Use the supplied bolts to fix the bracket to the loudspeaker When the angle is set fix with the supplied locking screw 9 23 Cuboid Loudspeakers Loudspeakers USER GUIDE 2022 Optimal Audio Group Ltd v2 2 Introduction Aiming coverage Overview Horizontal coverage Wall mount Connecting up Ceiling mount Matching speakers amps Grille ...

Page 10: ...rocess for the remaining gaps in the grille to ease it out of the slot all the way up one side of the cabinet when you get to the final gap the grille should pop out and away from the front of the cabinet To replace the grille first insert one side into the slot on one side of the cabinet Make sure the return on the grille is completely engaged in the slot Push on the front of the grille with the ...

Page 11: ...spigot holding the badge in place so the badge is protruding forward from the grille and is proud of the recess in which it sits Rotate the badge as required and release the spigot on the rear so it settles back into the recess in the grille To adjust the badge on Cuboid 3 3TX 5 and 5TX simply rotate as required Badge rotation 11 23 Cuboid Loudspeakers Loudspeakers USER GUIDE 2022 Optimal Audio Gr...

Page 12: ...t therefore follows that the axis should be aimed at the furthest point of the desired coverage area This is also useful for controlling the amount of energy hitting unwanted areas such as a ceiling or wall or ensuring SPL is not too high for a listener near the loudspeaker see page 14 on aiming and room coverage These specifications refer to the loudspeaker ex factory with the loudspeaker in port...

Page 13: ... 1 3 13 23 Cuboid Loudspeakers Loudspeakers USER GUIDE 2022 Optimal Audio Group Ltd v2 2 Introduction Aiming coverage Overview Horizontal coverage Wall mount Connecting up Ceiling mount Matching speakers amps Grille removal Accessories Badge rotation Specifications Coverage Horn rotation Safety info ...

Page 14: ...AL HORN HORN AXIS AIMED AT FURTHEST POINT OF COVERAGE 6dB AIMED AT NEAREST POINT OF COVERAGE 6dB REDUCED ENERGY ON CEILING Loudspeaker axis aimed at the furthest point of the desired coverage area 11 40 m IN THIS EXAMPLE THE ROOM IS TOO BIG FOR ONE SPEAKER TO BE ABLE TO COVER RIGHT TO THE BACK A SECOND SPEAKER IS ADDED AT THE POINT WHERE THE FIRST AND SECOND CROSS OVER THE SECOND IS DELAYED BACK T...

Page 15: ...ility and the clarity of music reproduction For Cuboid 8 and upwards the horizontal dispersion is narrower and the loudspeakers will necessarily be placed closer together or further away from the listeners for seamless horizontal coverage Cuboid 3 horizontal coverage 2 x Cuboid 3 positioned to overlap horizontal coverage Cuboid 3 Cuboid 3 Cuboid 3 15 23 Cuboid Loudspeakers Loudspeakers USER GUIDE ...

Page 16: ... recommend using a flexible cable with a minimum cross sectional area of 1 5mm 1 2 1 2 Connecting Cuboid 8 10 12 and 15 Cuboid connector viewed from rear Cuboid uses these terminals When wiring loudspeaker cables be careful to observe the correct polarity of the cable and connector at both ends 16 23 Cuboid Loudspeakers Loudspeakers USER GUIDE 2022 Optimal Audio Group Ltd v2 2 Introduction Aiming ...

Page 17: ... Then push the cable mounted connector into the speaker and slide the cover over the cable until it fits against the recess in the back of the speaker Insert the four screws to secure in place tight enough to seal against the cabinet but not over tight Finally tighten the cable gland onto the cable s to provide a good seal If only one gland is used tighten the second as far as you can Fitting weat...

Page 18: ...5 3 75 5 7 5 5 7 5 10 15 18 23 Cuboid Loudspeakers Loudspeakers USER GUIDE 2022 Optimal Audio Group Ltd v2 2 Introduction Aiming coverage Overview Horizontal coverage Wall mount Connecting up Ceiling mount Matching speakers amps Grille removal Accessories Badge rotation Specifications Coverage Horn rotation Safety info ...

Page 19: ... standing 1m away from it It will however be able to deliver transient peaks in the audio signal at 121dB SPL 1m when connected to an amplifier capable of delivering the full 800W of its peak power handling In the case of Cuboid 3TX and 5TX the inclusion of a 70V 100V transformer determines the amount of power being delivered to the loudspeaker see previous page The amplifier sees the transformer ...

Page 20: ... Cuboid 15 black U Bracket A black UB1 B U bracket for Cuboid 8 black U Bracket B black UB2 B U bracket for Cuboid 10 black U Bracket C black UB3 B U bracket for Cuboid 12 black U Bracket D black UB4 B U bracket for Cuboid 15 black Accessories 20 23 Cuboid Loudspeakers Loudspeakers USER GUIDE 2022 Optimal Audio Group Ltd v2 2 Introduction Aiming coverage Overview Horizontal coverage Wall mount Con...

Page 21: ...TAPS 70V 2 5 3 75 5 7 5W 2 5 3 75 5 7 5W TRANSFORMER TAPS 100V 5 7 5 10 15W 5 7 5 10 15W DISPERSION 6dB 130 H x 120 V 130 H x 120 V 150 H x 100 V 150 H x 100 V 90 H x 50 V user rotatable 90 H x 50 V user rotatable 80 H x 50 V user rotatable 80 H x 50 V user rotatable ENCLOSURE ABS ABS ABS ABS Trapezoid wooden cabinet Trapezoid wooden cabinet Trapezoid wooden cabinet Trapezoid wooden cabinet FINISH...

Page 22: ...ularly at plugs convenience receptacles and the point where they exit from the apparatus 10 Do not unplug the unit by pulling on the loudspeaker cable use the plug 11 Refer all servicing to qualified service personnel Servicing is required when the apparatus has been damaged in any way such as liquid has been spilled or objects have fallen into the apparatus the apparatus has been exposed to rain ...

Page 23: ...Relax It s Optimal Audio Optimal Audio Group Ltd Century Point Halifax Road Cressex Business Park High Wycombe Buckinghamshire HP12 3SL optimal audio co uk ...

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