Operation ManualENGLISH

Column Speakers

CU-910/920/930/940

COLUMN SPEAKERS

WelcomeWelcomeA personal welcome to you from the management and employees of Inter-M

All of the co-workers here at Inter-M are dedicated to providing excellent products with inherently good value,and we are delighted you have purchased one of our products.

We sincerely trust this product will provide years of satisfactory service, but if anything is not to your completesatisfaction, we will endeavor to make things right.

Welcome to Inter-M, and thank you for becoming part of our worldwide extended family!

RISK OF ELECTRIC SHOCKDO NOT OPEN

CAUTION

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK.

DO NOT REMOVE COVER (OR BACK).

NO USER-SERVICEABLE PARTS INSIDE.

REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.

WARNING

To prevent fire or shock hazard, do notexpose the unit to rain or moisture.

*WARNING FOR YOUR PROTECTION PLEASE READ THE FOLLOWING-WATER AND MOISTURE: Unit should not be used near water(e.g.near a bathtub, washbowl, kitchen sink, laundry tub, in a wet basement, or near a swimming pool, etc). Care should be taken so than objects donot fall and liquids are not spilled into the enclosure through openings.

*Do not install this equipment in a confined space such as a book case or similar unit.*This apparatus shall not be exposed to dripping or splashing and no objects filled with liquids, such vases, shall be placed on the apparatus.*This apparatus shall be connected to a mains socket outlet with a protective earthing connection.*It has heed to be easy to disconnect the device. To disconnect the device from power, separate AC input cable from inlet or unplug the AC Cord.

CAUTION*These servicing instructions are for use by qualified service personnel only. To reduce the risk of electric shock, do not perform any servicing oth-er than that contained in the operating instructions unless you are qualified to do so.

NOTE*This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits aredesigned to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipmentgenerates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmfulinterference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user willbe required to correct the interference at his own expense.

This symbol is intended to alert the user to the pres-ence of uninsulated “dangerous voltage” within theproduct’s enclosure that may be of sufficient magni-tude to constitute a risk of electric shock to persons.

This symbol is intended to alert the user to the pres-ence of important operation and maintenance (servic-ing) instructions in the literature accompanying theappliance.

Caution: To prevent electric shock do not use this (polarized) plug withan extension cord, receptacle or other outlet unless the bladescan be fully inserted to prevent blade exposure.

Attentions: Pour prévenir les chocs électriques ne pas utiliser cettefiche polarisée avec un prolongateur, une prise de couranton une autre sortie de courant, sauf si les lames peuventétre insérées à fond sans en laisser aucune partie à décou-vert.

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1CU-910/920/930/940

ContentsContentsUnpacking .......................................................................................................................................2

InstallationEnvironment....................................................................................................................................2Important Safety Instructions.............................................................................................................2

Features............................................................................................................................................3

Setup and Operation .....................................................................................................................3

Connecting your Speaker System................................................................................................4

Polar Pattern Diagram ..................................................................................................................6

Frequency Response ......................................................................................................................7

Matching Transformer ...................................................................................................................7

Specifications ..................................................................................................................................8

ServiceProcedures......................................................................................................................................9Schematic .......................................................................................................................................9Parts List .........................................................................................................................................9

Variations and Options .................................................................................................................9

Warranty .........................................................................................................................................9

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Installation

UnpackingUnpacking Although your CU-910/920/930/940 is neither complicated nor difficult to operate, we recommend youtake a few minutes to read this brief manual and familiarize yourself with the important information regardingproduct features, setup and operation.

As with most electronic devices, we strongly recommend you retain the original packaging. In the unlikelyevent the product must be returned for servicing, the original packaging (or reasonable equivalent) isrequired.

InstallationEnvironmentNever place this product in an environment which could alter its performance or reduce its service life. Suchenvironments usually include high levels of heat, dust, moisture, and vibration.

IMPORTANT SAFETY INSTRUCTIONS1. Read these instructions.2. Keep these instructions.3. Heed all warnings.4. Follow all instructions.5. Do not use this apparatus near water.6. Clean only with dry cloth.7. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including

amplifiers) that produce heat.9. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two

blades with one wider than the other. A grounding type plug has two blades and a third groundingprong. The wide blade or the third prong are provided for your safety. If the provided plug does not fitinto your outlet, consult an electrician for replacement of the obsolete outlet.

10. Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles,and the point where they exit from the apparatus.

11. Only use attachments/accessories specified by the manufacturer.12. Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the appa-

ratus. When a cart is used, use caution when moving the cart/apparatus combination to avoid injury fromtip-over.

13. Unplug this apparatus during lightning storms or when unused for long periods of time.14. Refer all servicing to qualified service personnel. Servicing is required when the apparatus

has been damaged in any way, such as power-supply cord or plug is damaged, liquidhas been spilled or objects have fallen into the apparatus, the apparatus has beenexposed to rain or moisture, does not operate normally, or has been dropped.

S3125A

S3125A

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FeaturesFeatures- DESIGNED FOR INDOOR USESleek, stylish design blends with most indoor environments.

- DURABILITYAluminum alloy construction and anti-rust coating for long life and durability.

- HIGH EFFICIENCY FOR P.AFull range speaker unit and matching transformer are incorporated for high efficiency of P.A.

- EASY INSTALLATIONInstalls easily with included bracket.

- 2 WAY SYSTEMTo assure absolute long-term reliability these model are used by tweeter of high quality.

Setup and OperationSetup and OperationAfter unpacking your CU-910/920/930/940 Indoor Column Speaker, attach the speaker to a wall or othersecure surface with the supplied mounting bracket. The illustration below shows the preferred method ofsecuring the speaker.

WARNING: under no circumstances should any loudspeaker be mounted or suspended in a public placeunless the mounting method has been approved and certified by a qualified engineer. Failureto properly secure the system can result in damage to the unit or personal injury.

Bracket B

Wall

Bolt

Nut

ScrewHILTI Nail

Bracket A

SPEAKER

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Connecting your Speaker SystemConnecting your Speaker SystemAlways switch off the power to the amplifier before connecting speakers.

Choosing the Correct Speaker CableIt is important to choose cabling designated for audio use and good quality connectors. Using guitar cableor zip cord(designed for lamps and other electrical use) or poor quality connectors will degrade your loud-speakers' audio performance. For distributed loudspeaker systems, we recommend stranded twisted pairspeaker cable with and overall vinyl jacket (plenum rated when installed in required installations).

Always use the appropriate gauge of speaker cable. For cable runs of less than 25 feet (7.5 meters), 18-gauge cable is adequate. For longer cables, we suggest 16-gauge stranded cable.

Speaker Connection ProceduresAfter removing approximately 10mm (1/4-inch) of insulation from the ends of the speaker cables, twist thestrands tightly and when twist together with the distribution cable(s), using an appropriate cable connector.Make certain the wires do not protrude form the cable connector and touch any metal on the speaker chas-sis, or any other adjacent metal.Connect speaker wires to the appropriate terminals for your mode of operation, as shown in the illustration below.

Maintaining Proper PolarityIt is very important to wire your speakers consistently in order to maintain proper polarity. All quality cablesare manufactured with clear markings to identify the different conductors - normally by color-coding, print-ed markings, or textured ribbing on the cable's jacket material. Failing to do so will cause your speakers tooperate out of phase, resulting in significantly reduced low-frequency output from your system.

COM500Ω1KΩCOM1KΩ2K

CU-910 CU-920

CU-930 CU-940

Ω

COM330Ω660Ω COM250Ω500Ω

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Choosing the Correct AmplificationWhen selecting an amplifier for use with your distributed speaker system, it is important to choose anamplifier that has sufficient power output.Choosing an amplifier that does not have adequate rated power may result in pushing the amp beyond itslimits, producing distortion or “ clipping” of the signal. This can irritate the listener and may cause damageto the speaker.Choosing an amplifier that is over-powered can result in over-driving the speaker system.

Using Multiple LoudspeakersIt is important to consider the overall speaker load (impedance) when connecting distributed speaker sys-tems to an amplifier. Some distributed loudspeakers are marked in load impedance; others show thewattage taps. Whatever the, case, it is easy to compute the total impedance (or wattage load) that is possi-ble for a given amplifier.

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Polar Pattern DiagramPolar Pattern Diagram

500Hz

1000Hz

2000Hz

4000Hz

-35

-30

-25

-20

-15

-10

-5

0

50

1020

30

40

50

60

70

80

90

100

110

120

130

140

150160

170180

190200

210

220

230

240

250

260

270

280

290

300

310

320

330340

350

500Hz

1000Hz

2000Hz

4000Hz

-35

-30

-25

-20

-15

-10

-5

0

50

1020

30

40

50

60

70

80

90

100

110

120

130

140

150160

170180

190200

210

220

230

240

250

260

270

280

290

300

310

320

330340

350

- CU-910 - CU-920

500Hz

1000Hz

2000Hz

4000Hz

-35

-30

-25

-20

-15

-10

-5

0

50

1020

30

40

50

60

70

80

90

100

110

120

130

140

150160

170180

190200

210

220

230

240

250

260

270

280

290

300

310

320

330340

350

500Hz

1000Hz

2000Hz

4000Hz

-35

-30

-25

-20

-15

-10

-5

0

50

1020

30

40

50

60

70

80

90

100

110

120

130

140

150160

170180

190200

210

220

230

240

250

260

270

280

290

300

310

320

330340

350

- CU-930 - CU-940

COLUMN SPEAKERS

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Frequency ResponseFrequency Response

Matching TransformerMatching Transformer

CU-940

CU-910

60

70

20 200 Hz 2k 20k

80

90

100

dB

110

50

60

20 200 Hz 2k 20k

70

80

90

dB

100

CU-930

CU-920

- CU-910/940 - CU-920/930

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CU-910 CU-920 CU-930 CU-940

Rated Input 10W 20W 30W 40W

Impedance 1KΩ/2kΩ 500Ω/1kΩ 330Ω/660Ω 250Ω/500Ω

Frequency Response 220Hz ~ 15kHz

SPL(1W/1m) 87dB 90dB 91dB 93dB

Casing Aluminum

Operating temperature -10。C ~ +40。C

Weight (SET) 1.45kg/3.2lb 2.35kg/5.18lb 2.85kg/6.23lb 3.35kg/7.39lb

Dimensions (SET) 104(W)X290(H)X86(D)mm/ 104(W)X400(H)X86(D)mm/ 104(W)X490(H)X86(D)mm/ 104(W)X580(H)X86(D)mm/ 4.1(W)X11.4(H)X3.4(D)in 4.1(W)X15.8(H)X3.4(D)in 4.1(W)X19.3(H)X3.4(D)in 4.1(W)X22.9(H)X3.4(D)in

* Specifications and design are subject to change without notice.

SpecificationsSpecifications

COLUMN SPEAKERS

ServiceService

ProceduresTake steps to insure the problem is not related to operator error or other products within the system. Informationprovided in the troubleshooting portion of this manual may help with this process. Once it is certain that theproblem is related to the product contact your warranty provider as described in the warranty section of thismanual.

SchematicA Schematic is available by contacting your warranty provider.

Parts ListA Parts List is available by contacting your warranty provider.

Variations and OptionsVariations and Options

VariationsProducts supplied through legitimate sources are compatible with local AC power requirements.

Options No optional items are available for this product.

WarrantyWarranty

Warranty terms and conditions vary by country and may not be the same for all products. Terms and conditionsof warranty for a given product may be determined first by locating the appropriate country which the productwas purchased in, then by locating the product type.

To obtain specific warranty information and available service locations contact Inter-M directly or the authorizedInter-M Distributor for your specific country or region.

NOTE

MADE IN KOREAwww.inter-m.com

2009.8 124926