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1.

  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 a 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 grounding prong. 

The wide blade or the third prong are provided for your safety. If the 

provided plug does not fit into 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 a cart, stand, tripod, bracket, or 

table specified by the manufacturer, or sold with 

the apparatus. When a cart is used, use caution 

when moving the cart/apparatus combination to 

avoid injury from tip-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, liquid has been spilled or objects have 

fallen into the apparatus, the apparatus has been exposed to rain or 

moisture, does not operate normally, or has been dropped.

15.

 This apparatus shall not be exposed to dripping or splashing, and no 

object filled with liquids, such as vases or beer glasses, shall be placed 

on the apparatus.

16.

 Do not overload wall outlets and extension cords as this can result in a 

risk of fire or electric shock.

17.

 This apparatus has been designed with Class-I construction and must 

be connected to a mains socket outlet with a protective earthing con-

nection (the third grounding prong).

18.

 This apparatus has been equipped with a rocker-style AC mains power 

switch. This switch is located on the rear panel and should remain 

readily accessible to the user.

19.  

The MAINS plug or an appliance coupler is used as the disconnect 

device, so the disconnect device shall remain readily operable.

20.

 NOTE: This equipment has been tested and found to comply with 

the limits for a Class B digital device, pursuant to part 15 of the FCC 

Rules. These limits are designed to provide reasonable protection 

against harmful interference in a residential installation. This equip-

ment generates, uses, and can radiate radio frequency energy and, if 

not installed and used in accordance with the instructions, may cause 

harmful interference to radio communications. However, there is no 

guarantee that interference will not occur in a particular installation. If 

this equipment does cause harmful interference to radio or television 

reception, which can be determined by turning the equipment off and 

on, the user is encouraged to try to correct the interference by one or 

more of the following measures:

•  Reorient or relocate the receiving antenna.

•  Increase the separation between the equipment and the receiver.

•  Connect the equipment into an outlet on a circuit different from 

that to which the receiver is connected.

•  Consult the dealer or an experienced radio/TV technician for help.

  CAUTION: Changes or modifications to this device not expressly 

approved by LOUD Technologies Inc. could void the user's authority to 

operate the equipment under FCC rules.

21.

 This apparatus does not exceed the Class A/Class B (whichever is 

applicable) limits for radio noise emissions from digital apparatus as 

set out in the radio interference regulations of the Canadian Department 

of Communications.

ATTENTION

 — 

Le présent appareil numérique n’émet pas de bruits 

radioélectriques dépassant las limites applicables aux appareils 

numériques de class A/de class B (selon le cas) prescrites dans le 

réglement sur le brouillage radioélectrique édicté par les ministere des 

communications du Canada.

22.

 Exposure to extremely high noise levels may cause permanent hearing 

loss. Individuals vary considerably in susceptibility to noise-induced 

hearing loss, but nearly everyone will lose some hearing if exposed to 

sufficiently intense noise for a period of time. The U.S. Government’s 

Occupational Safety and Health Administration (OSHA) has specified 

the permissible noise level exposures shown in the following chart.

  According to OSHA, any exposure in excess of these permissible limits 

could result in some hearing loss. To ensure against potentially danger-

ous exposure to high sound pressure levels, it is recommended that all 

persons exposed to equipment capable of producing high sound pres-

sure levels use hearing protectors while the equipment is in operation. 

Ear plugs or protectors in the ear canals or over the ears must be worn 

when operating the equipment in order to prevent permanent hearing 

loss if exposure is in excess of the limits set forth here:

Important Safety Instructions

PORTABLE CART

WARNING

CAUTION    

AVIS

RISK OF ELECTRIC 

SHOCK. DO NOT OPEN

RISQUE DE CHOC ELECTRIQUE. NE PAS OUVRIR

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE COVER (OR BACK)

NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL

ATTENTION: POUR EVITER LES RISQUES DE CHOC ELECTRIQUE, NE PAS ENLEVER LE COUVERCLE. 

AUCUN ENTRETIEN DE PIECES INTERIEURES PAR L'USAGER. 

CONFIER L'ENTRETIEN AU PERSONNEL QUALIFIE.

AVIS: POUR EVITER LES RISQUES D'INCENDIE OU D'ELECTROCUTION, N'EXPOSEZ PAS CET ARTICLE 

A LA PLUIE OU A L'HUMIDITE

The lightning flash with arrowhead symbol within an equilateral triangle is 
intended to alert the user to the presence of uninsulated "dangerous 
voltage" within the product's enclosure, that may be of sufficient magnitude 
to constitute a risk of electric shock to persons.

Le symbole éclair avec point de flèche à l'intérieur d'un triangle équilatéral 
est utilisé pour alerter l'utilisateur de la présence à l'intérieur du coffret de 
"voltage dangereux" non isolé d'ampleur suffisante pour constituer un risque 
d'éléctrocution.

The exclamation point within an equilateral triangle is intended to alert the 
user of the presence of important operating and maintenance (servicing) 
instructions in the literature accompanying the appliance.

Le point d'exclamation à l'intérieur d'un triangle équilatéral est employé 
pour alerter les utilisateurs de la présence d'instructions importantes pour le 
fonctionnement et l'entretien (service) dans le livret d'instruction 
accompagnant l'appareil.

WARNING — To reduce the risk of fire or electric shock, do not 

expose this apparatus to rain or moisture.

Duration, 

per day in 

hours

Sound Level 

dBA, Slow 

Response

Typical Example 

8

90

Duo in small club

6

92

4

95

Subway Train

3

97

2

100

Very loud classical music

1.5

102

1

105

Greg and Ben screaming at Troy 

about deadlines

0.5 

110

0.25 or less 115

Loudest parts at a rock concert

Summary of Contents for TH-18S

Page 1: ...OWNER S MANUAL 18 Powered Subwoofer TH 18s...

Page 2: ...or an experienced radio TV technician for help CAUTION Changes or modifications to this device not expressly approved by LOUD Technologies Inc could void the user s authority to operate the equipment...

Page 3: ...www mackie com for more information about this and other Mackie products Subwoofer 1 Subwoofer 2 Please write the serial number for your TH 18s here or for both TH 18s s if you have two for future re...

Page 4: ...ontrol and loudness from the subwoofer Now that you have your subwoofers working it s time to hunker down and read the rest of this manual especially the following ADDITIONAL TIDBITS OF WIDSDOM Never...

Page 5: ...ug and play system that is ideal for small clubs DJs and rehearsal spaces The TH 18s has both full range and high pass stereo outputs for connection to full range top boxes Just dial in the appropriat...

Page 6: ...the inputs of the powered loudspeakers so these reproduce the mid to high frequencies in stereo and the subs provide the low frequencies in stereo TH 18s Left and Right Main Powered Loudspeakers Macki...

Page 7: ...he inputs are summed in mono to play in the subwoofer but this does not affect the full range or high pass outputs which remain fully stereo The left and right full range line level outputs of this su...

Page 8: ...e other loudspeakers in your system and account for the subwoofer s location and your room s environment 1 IEC AC Receptacle and Fuse Connect the detachable line cord to this IEC socket securely and p...

Page 9: ...ers the subwoofer The frequency range above 125 Hz is sent to these line level output jacks Connect these outputs to the inputs of your main powered loudspeakers or to the inputs of the amplifier powe...

Page 10: ...ights when the amplifier in the TH 18s is near the clipping point It is okay if the OL indicator blinks occasionally because this means that the transient peaks are just reaching the maximum output of...

Page 11: ...its position especially if you are listening to just the subwoofer This is normal as our ears perceive them both as the same The polarity invert switch comes into play when the TH 18s subwoofer is pai...

Page 12: ...esigned to protect the subwoofers under reasonable and sensible conditions Should you choose to ignore the warning signs i e frequent OL LED indications excessive distortion you can still damage the s...

Page 13: ...o fuses blow in a row then something is very wrong Try a different outlet in a totally different location If fuses continue to blow see the Repair section on the next page to find out what to do No So...

Page 14: ...g a ground loop If connecting an unbalanced output to the TH 18s balanced input make sure the shield is connected to the unbalanced ground and to pin 1 of the XLR Repair For warranty service refer to...

Page 15: ...labeled FULL RANGE and two labled HIGH PASS These are also wired according to the AES standards listed above The FULL RANGE connectors allow you to connect several TH 18s s Simply plug the signal sour...

Page 16: ...uency Range 10 dB 35 Hz 150 Hz Frequency Response 3 dB 50 Hz 115 Hz Max peak SPL calculated 1 129 dB Max peak SPL measured 2 124 dB Transducer Diameter 18 in 457 mm Voice coil diameter 3 in 76 mm Diap...

Page 17: ...vided by the distributor in your local market LOUD warrants to Customer that the product will be free from defects in materials and workmanship under normal use during the Warranty Period If the produ...

Page 18: ...Road NE Woodinville WA 98072 USA United States and Canada 800 898 3211 Europe Asia Central and South America 425 487 4333 Middle East and Africa 31 20 654 4000 Fax 425 487 4337 www mackie com E mail s...

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