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4

Getting Started

The following steps will help you set up your 

subwoofer(s) quickly.

INITIAL SETTINGS:

1.  Turn the LEVEL control on the rear panel all the 

way down.

2.  Turn the POWER switch OFF.

CONNECTIONS:

1.   Connect the line-level signal from a mixer (or other 

signal source) to the INPUT jack on the TH-18s rear 
panel (XLR connector). If you are operating the 
system in stereo, connect INPUT B, as well.

2.  Connect the supplied AC power cord to the IEC 

socket on the back of the subwoofer. Plug the other 
end into an AC outlet properly configured with the 
correct voltage as indicated

 

just above the IEC 

socket.

TURN IT ON:

1.   Turn the POWER switch ON.
2.  Start your signal source (mp3 player, CD, DAW, 

band, or whatever), but leave the master level 
control on your mixer down.

3.  Slowly turn up the LEVEL control on the TH-18s to 

the “U” (unity gain) mark at the center position.

4.  Adjust the master volume on your mixer to a 

comfortably loud listening level. If the volume from 
the subwoofer gets really loud, really fast, try turning 
down the LEVEL control on the TH-18s a bit. If 
the subwoofers don’t get loud enough, turn up the 
LEVEL control to achieve a good balance of master 
volume control 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 listen to loud music for prolonged periods.  

     Please see the Safety Instructions on page 2 for  
    information on hearing protection.

•   When you shut down your equipment, turn off the  

       TH-18s subwoofers first to prevent thumps    
    and other noises generated by any upstream    
    equipment from coming out the speakers. When  
    powering up, turn on the TH-18s last, but just  
    before your full-range loudspeakers.

•   Save the shipping boxes and packing materials!  

    You may need them someday. Besides, your    
    cat will love playing in them and jumping out at  
    you unexpectedly. Remember to pretend like you  

    are surprised!

•   Save your sales receipt in a safe place.

•   Record the serial number in the space provided on  

    page 3, along with where and when you bought it.

 

FUSE: T10AH AC250V

TH-18s

ACTIVE SOUND 

REINFORCEMENT SUBWOOFER

REVISION

SERIAL NUMBER

WARNING

:

 TO REDUCE THE RISK OF FIRE OR ELECTRIC

SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR
MOISTURE.  DO NOT REMOVE COVER. NO USER SERVICEABLE
PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL.

AVIS: RISQUE DE CHOC ELECTRIQUE — NE PAS OUVRIR

POWER

ON

B

A

INPUTS

B

A

B

A

OUTPUTS

HIGH PASS

FULL RANGE

LEVEL

OL

SIGNAL POWER

POLARITY

NORMAL
INVERT

THERMAL

R

+

6dB

6dB

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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