Mackie Speaker TH 12A User Manual

TH-12A  
2-Way 12" Powered Loudspeaker  
O W N E R ’ S M A N U A L  
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CONTENTS  
What? Me read a manual?  
Before you begin, please make sure you read the  
Safety Instructions on page 2 and Getting Started  
on page 4.  
SAFETY INSTRUCTIONS ........................................... 2  
INTRODUCTION ...................................................... 5  
HOOKUP DIAGRAMS............................................... 5  
FEATURES .............................................................. 8  
REAR PANEL DESCRIPTION................................ 8  
1. INPUT........................................................ 8  
2. THRU ........................................................ 8  
3. LEVEL ........................................................ 8  
4. OL INDICATOR............................................ 9  
5. HIGH EQ .................................................... 9  
6. MID EQ ...................................................... 9  
7. MID FREQ .................................................. 9  
8. LOW EQ ..................................................... 9  
9. EQ ON/OFF SWITCH .................................. 9  
10. POWER SWITCH......................................... 9  
11. LINE CORD SOCKET AND FUSE..................... 9  
PROTECTION CIRCUITS.......................................... 10  
INPUT SIGNAL WIRING......................................... 10  
PLACEMENT.......................................................... 10  
APPENDIX A: SERVICE INFORMATION.................... 11  
APPENDIX B: CONNECTIONS ................................. 12  
APPENDIX C: SPECIFICATIONS ............................... 13  
DIMENSIONS........................................................ 14  
FREQUENCY GRAPH.............................................. 14  
BLOCK DIAGRAM.................................................. 15  
MACKIE LIMITED WARRANTY................................ 16  
Your new Mackie TH-12A powered loudspeakers  
are designed to set up quickly and operate easily.  
We know it’s often seen as a sign of weakness to  
read a manual, along with asking for directions  
when lost, but we hope you will read the rest of the  
manual, at least while nobody is looking.  
It is important to keep your receipt in a  
safe place, and not a bad idea to write your  
product information below for future reference  
(i.e., insurance claims, tech support, return  
authorization, etc.).  
Please write the serial number for your TH-12A here  
(or for both TH-12As if you have two) for future reference:  
Loudspeaker 1  
Loudspeaker 2  
Purchased at:___________________________________ Date of Purchase:_____________  
Don’t forget to visit our website at www.mackie.com  
for more information about this and other Mackie products.  
Part No. SW0890 Rev. C 03/11  
©2011 LOUD Technologies Inc. All Rights Reserved.  
3
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Getting Started  
The following steps will help you set up your  
loudspeakers quickly.  
Now that you have your loudspeakers working, it’s  
time to hunker down and read the rest of this manual…  
especially the following:  
INITIAL SETTINGS:  
ADDITIONAL TIDBITS OF WIDSDOM:  
1. Turn the LEVEL control on the rear panel all the  
way down.  
2. Set the EQ ON/OFF switch out (OFF).  
3. Turn the POWER switch OFF.  
• 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-12A loudspeakers first to prevent thumps  
and other noises generated by any upstream  
equipment from coming out of the speakers.  
When powering up, turn on the TH-12As last.  
CONNECTIONS:  
1. Connect the line-level signal from your mixer (or  
other signal source) to the INPUT jack on the  
TH-12A rear panel (XLR connector).  
• 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!  
2. Connect the supplied AC power cord to the IEC  
socket on the back of the loudspeaker. Plug the  
other end into an AC outlet properly configured with  
the correct voltage as indicated just below the IEC  
socket.  
• Save your sales receipt in a safe place.  
TURN IT ON:  
• Record the serial number in the space provided on  
1. Turn the POWER switch ON.  
page 3, along with where and when you bought it.  
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-12A to  
the “U” (unity gain) mark at the center position.  
4. Adjust the master volume on your mixer to a  
comfortable listening level. If the volume from the  
speakers gets really loud, really fast, try turning  
down the LEVEL control on the TH-12A a bit. If the  
speakers don’t get loud enough, turn up the LEVEL  
control to achieve a good balance of master volume  
control and loudness from the speaker.  
4
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Introduction  
The Mackie TH-12A Powered Loudspeaker delivers a chest-pounding 400W of peak system power via ultra-  
efficient Class-D amplification. This means more power with less weight, perfect when portability matters. The 12"  
high-precision woofer and 1" compression driver provide punchy sound with superior midrange response, ideal for  
vocal and acoustic applications.  
An integrated 3-band contour EQ with a sweepable mid-frequency lets you dial in the perfect tone and even  
allows you to correct common room anomalies. The XLR input handles both mic and line level signals, so you can  
just hook up a mic and be heard, assuming you have something to say. There’s even an XLR Thru that allows you to  
easily “daisy chain” multiple TH-12As for increased coverage.  
The TH-12A harnesses Mackie’s Active technology, including transducer time alignment, phase correction and  
precision crossovers, maximizing the potential of every component. The TH-12A is truly greater than the sum of its  
parts.  
Convenient top and side handles are integrated into the rugged, impact-resistant polypropylene enclosure,  
providing a PA solution that is as durable as it is portable. It makes the perfect stage monitor, and at only 25.5 lb,  
it’s a breeze to pole-mount on a tripod stand or atop a subwoofer.  
Mackie Thump TH-12A — High-performance audio without the high price tag.  
Here’s a quick look at all the features packed into the TH-12A loudspeaker:  
• 100W HF and 300W LF power amplifiers (peak)  
• 12" low-frequency woofer  
• High-density adiabatic fiberfill absorbs internal  
reflections  
• 1" high-frequency compression driver  
• Flat frequency response (–10 dB, 57 Hz to 20 kHz)  
• 24 dB/octave crossover at 3 kHz  
• Low-frequency over-excursion protection  
• High-strength lightweight polypropylene cabinet  
• Ported, bass reflex design for enhanced bass  
performance  
• Rear panel power switch  
• Pole-mount socket  
• Balanced Mic/Line XLR input and thru connectors  
• Adjustable input level control  
• LF EQ provides ±15 dB at 80 Hz and below  
• MF EQ provides ±15 dB with sweepable frequency  
from 100 Hz to 8 kHz  
• Convenient portable design, with integrated  
handles in both sides and top  
• HF EQ provides ±15 dB at 12 kHz and above  
• EQ bypass switch  
Stereo Speaker Hookup  
Left  
Line-Level  
Output  
Right  
Line-Level  
Output  
TH-12A  
TH-12A  
CONTOUR EQ  
CONTOUR EQ  
U
U
EQ  
EQ  
MIC  
MIC  
MIC  
MIC  
(UNBALANCED)  
L
L
OFF  
ON  
OFF  
ON  
TAPE  
IN  
TAPE  
OUT  
R
HIGH  
HIGH  
12kHz  
12kHz  
R
-15 +15  
600  
-15 +15  
600  
1
2
3/4  
5/6  
7/8  
L
L
L
L
L
ProFX8 Mixer  
MON SEND  
FOOTSWITCH  
FREQ  
FREQ  
R
R
R
R
R
100 8k  
U
100 8k  
U
ST RETURN  
FX SEND  
MAIN OUT  
PHONES  
ON  
OL  
ON  
OL  
STEREO GRAPHIC EQ  
48V  
MID  
MID  
GAIN  
GAIN  
GAIN  
GAIN  
GAIN  
POWER  
LEVEL  
U
POWER  
LEVEL  
U
EQ  
EQ  
EQ  
EQ  
EQ  
-15 +15  
U
-15 +15  
U
MAIN  
METERS  
LOW  
LOW  
USB  
80Hz  
80Hz  
FX PRESETS  
O
O
-15 +15  
THRU  
-15 +15  
THRU  
AUX  
PAN  
AUX  
PAN  
AUX  
PAN  
AUX  
PAN  
AUX  
PAN  
O
O MAX  
O
O MAX  
INPUT LEVEL  
L
R
USB THRU  
BREAK  
INPUT  
INPUT  
FX MASTER  
MUTE  
FX TO MON  
PHONES  
TAPE LEVEL  
MUTE  
MUTE  
MUTE  
3/4  
MUTE  
5/6  
MUTE  
7/8  
MAIN  
MON  
1
2
ST RTN  
FX RTN  
The left and right line-level outputs from a mixer feed the inputs of two Mackie TH-12A Powered  
Loudspeakers.  
5
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Daisy-Chaining Two Speakers Per Side  
Using a Microphone and the Thru Jack  
TH-12A  
TH-12A  
CONTOUR EQ  
U
CONTOUR EQ  
U
EQ  
EQ  
OFF  
ON  
OFF  
ON  
HIGH  
HIGH  
12kHz  
12kHz  
-15 +15  
600  
-15 +15  
600  
FREQ  
FREQ  
100 8k  
U
100 8k  
U
ON  
OL  
ON  
OL  
MID  
MID  
POWER  
LEVEL  
U
POWER  
LEVEL  
U
-15 +15  
U
-15 +15  
U
CONTOUR EQ  
LOW  
LOW  
U
80Hz  
80Hz  
EQ  
O
O
-15 +15  
THRU  
-15 +15  
THRU  
OFF  
ON  
O
O MAX  
O
O MAX  
HIGH  
12kHz  
-15 +15  
600  
INPUT  
INPUT  
FREQ  
100 8k  
U
ON  
OL  
MID  
POWER  
LEVEL  
-15 +15  
U
U
LOW  
TH-12A  
TH-12A  
80Hz  
O
-15 +15  
THRU  
O O MAX  
CONTOUR EQ  
U
CONTOUR EQ  
U
EQ  
EQ  
OFF  
ON  
OFF  
ON  
HIGH  
HIGH  
INPUT  
12kHz  
12kHz  
-15 +15  
600  
-15 +15  
600  
FREQ  
FREQ  
100 8k  
U
100 8k  
U
ON  
OL  
ON  
OL  
MID  
MID  
POWER  
LEVEL  
U
POWER  
LEVEL  
U
-15 +15  
U
-15 +15  
U
LOW  
LOW  
80Hz  
80Hz  
Dynamic  
O
O
-15 +15  
THRU  
-15 +15  
THRU  
O
O MAX  
O
O MAX  
Microphone  
INPUT  
INPUT  
CONTOUR EQ  
U
EQ  
OFF  
ON  
HIGH  
Thru  
Thru  
12kHz  
-15 +15  
600  
FREQ  
100 8k  
U
ON  
OL  
MID  
Left  
Right  
POWER  
LEVEL  
U
-15 +15  
U
Line-Level  
Output  
Line-Level  
Output  
LOW  
80Hz  
O
-15 +15  
THRU  
O O MAX  
MIC  
MIC  
MIC  
MIC  
MIC  
MIC  
(UNBALANCED)  
L
L
T
APE  
IN  
T
OUT  
R
APE  
ProFX12 Mixer  
R
INPUT  
1
2
3
4
5/6  
7/8  
9/10  
11/12  
L
L
L
L
L
L
MON SEND  
FOOTSWITCH  
R
R
R
R
R
R
ST RETURN  
FX SEND  
MAIN OUT  
PHONES  
STEREO GRAPHIC EQ  
48V  
GAIN  
GAIN  
GAIN  
GAIN  
GAIN  
GAIN  
GAIN  
GAIN  
EQ  
EQ  
EQ  
EQ  
EQ  
EQ  
EQ  
EQ  
MAIN  
METERS  
USB  
FX PRESETS  
AUX  
PAN  
AUX  
PAN  
AUX  
PAN  
AUX  
PAN  
AUX  
PAN  
AUX  
PAN  
AUX  
PAN  
AUX  
PAN  
L
R
INPUT LEVEL  
USB THRU  
BREAK  
FX MASTER  
MUTE  
FX TO MON  
PHONES  
T
APE LEVEL  
MUTE  
MUTE  
MUTE  
MUTE  
MUTE  
5/6  
MUTE  
7/8  
MUTE  
9/10  
MUTE  
11/12  
MON  
MAIN  
1
2
3
4
ST RTN  
FX RTN  
The left and right line-level outputs from a  
mixer feed the inputs of two Mackie TH-12A  
For microphone connections, you can daisy-chain  
up to two TH-12As using the THRU jack, as shown.  
Powered Loudspeakers. Their respective THRU  
jacks feed the inputs of another pair of Mackie  
TH-12A Powered Loudspeakers.  
Take great care to point any microphones away  
from the loudspeakers. Otherwise, feedback may  
occur.  
6
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PA System with two powered subwoofers  
Left Main  
Right Main  
Po wered Loudspeaker  
(Mackie TH-12A)  
Po wered Loudspeaker  
(Mackie TH-12A)  
High Pa ss  
Output  
High Pa ss  
Output  
Po le Mount  
Po le Mount  
ProFX12 Mixer  
From Mixer  
Right Output  
From Mixer  
Left Output  
Po wered Subwoofer  
(Mackie SRM1801)  
Po wered Subwoofer  
(Mackie SRM1801)  
The left and right line-level outputs from a mixer feed the inputs of two powered subwoofers. The high  
pass line-level outputs of the subwoofers feed the inputs of the Mackie TH-12A loudspeakers.  
PA System with one powered subwoofer  
Left and Right Main  
Powered Loudspeakers  
(Mackie TH-12A)  
High Pass  
Output  
High Pass  
Output  
1
2
3
4
5/6  
7/8  
9/10  
11/12  
From Mixer  
Left and Right  
Outputs  
MON  
MAIN  
ProFX12 Mixer  
Powered Subwoofer  
(Mackie SRM1801)  
The left and right line-level outputs from a mixer feed the inputs of a powered subwoofer. The high pass  
line-level outputs of the subwoofer feed the inputs of the Mackie TH-12A loudspeakers.  
7
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Mackie TH-12A Features  
REAR PANEL DESCRIPTION  
CONTOUR EQ  
9
U
EQ  
OFF  
ON  
HIGH  
5
12kHz  
-15 +15  
600  
FREQ  
7
100 8k  
U
ON  
OL  
4
3
MID  
6
LEVEL  
POWER  
-15 +15  
U
U
LOW  
10  
8
80Hz  
O
-15 +15  
O O  
MAX  
THRU  
INPUT  
11  
2
1
This is where you connect AC power and your  
signal to the loudspeaker and make adjustments to  
the frequency response of the speaker to match the  
loudspeaker’s location and your room’s environment.  
3. LEVEL  
The LEVEL control adjusts the overall signal level at  
the input to the built-in power amplifiers. It ranges from  
Off ( ) to MAX (maximum gain), with unity gain at the  
center position (12 o’clock).  
1. INPUT  
• The TH-12A is designed to operate with a +4  
dBu signal when the LEVEL control is at the U  
(center) position.  
This is a female XLR-type connector that accepts a  
balanced mic or line-level signal from a mixing console  
or other signal source. For small gigs, simply connect a  
microphone directly and adjust the LEVEL control [3]  
accordingly.  
• The TH-12A can accept up to a +20 dBu signal  
by turning down the LEVEL control accordingly.  
Turning the LEVEL past unity will provide enough  
gain to connect a microphone directly.  
2. THRU  
• NEVER connect the output of an amplifier directly  
to the input of the TH-12A. This could damage the  
active input circuitry of the loudspeaker.  
This is a male XLR-type connector that produces  
exactly the same signal that is connected to the input  
jack. Use it to daisy-chain several TH-12As together off  
the same signal source.  
8
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8. LOW EQ  
4. OL Indicator  
This control provides up to 15 dB of boost or cut  
below 80 Hz and it is also flat at the center  
position (U). This frequency range represents the  
punch in bass drums, bass guitar, fat synth patches, and  
some really serious male singers.  
The OL (overload) indicator lights when the  
amplifiers in the TH-12A are 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 the amplifiers and you are  
getting the most from your TH-12As.  
9. EQ ON/OFF Switch  
If the OL indicator is blinking frequently or lighting  
continuously, turn down the LEVEL control [3] on the  
TH-12A or turn down the signal at it source  
(e.g., the mixing console) until the OL indicator blinks  
occasionally or not at all.  
This switch allows you to bypass the EQ section.  
When the switch is out (OFF), the EQ section is  
bypassed and the EQ knobs have no effect on the signal.  
When the switch is pushed in (ON), the EQ controls  
may be used to tailor the frequency response of the  
TH-12A.  
5. HIGH EQ  
This control gives you up to 15 dB boost or cut above  
12 kHz. The circuit is flat (no boost or cut) at the  
center position (U). Use it to add sizzle to cymbals,  
and an overall sense of transparency or edge to the  
keyboards, vocals, guitar, and bacon frying. Turn it down  
a little to reduce sibilance, or to remove high frequency  
hiss.  
10. POWER Switch  
Use this switch to turn the TH-12A loudspeaker on  
and off. The indicating LED above the POWER switch  
lights when the POWER switch is on and AC power  
is available at the linecord socket. A second power  
indicator is located on the front of the cabinet.  
6. MID EQ  
11. Line Cord Socket and Fuse  
This is a midrange EQ control that provides 15 dB of  
boost or cut centered at any frequency between  
Connect the detachable line cord to this IEC socket  
securely, and plug the other end into your AC outlet.  
Make sure the AC power is matched to the AC power  
indicated on the rear panel (under the IEC socket).  
100 Hz and 8 kHz. The MID EQ circuit is flat (no boost  
or cut) at the center position (U). This frequency range  
includes most vocals (male at the lower end of the  
range and female at the upper end of the range), and  
the fundamentals and harmonics for many instruments.  
The fuse is located behind the fuse cover, at the  
bottom of the IEC socket. See the “Troubleshooting”  
section on page 11 for information about replacing the  
fuse.  
7. MID FREQ  
This knob ranges from 100 Hz to 8 kHz and  
determines the center frequency for the MID EQ filter.  
This allows you to zero in on the precise narrow band of  
frequencies you want to have affected by the MID EQ.  
9
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Protection Circuits  
There are several protection mechanisms designed  
into the TH-12A to safeguard the loudspeakers and  
amplifiers from inadvertent damage.  
• If the internal temperature again gets too hot,  
the shutdown process repeats. Should this  
happen, make sure that airflow to the rear of the  
cabinet is not restricted. If the ambient air  
temperature is very warm, try pointing a small  
fan toward the rear panel to increase the airflow  
across the rear panel.  
CAUTION: The protection circuits are  
designed to protect the loudspeakers 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 speakers in the TH-12A by  
overdriving them past the point of amplifier clipping. Such  
damage is beyond the scope of the warranty.  
Driver Protection  
Each driver has its own compression circuit, which  
helps protect them from damaging transient peaks. The  
compressors are designed to be transparent and are not  
noticeable under normal operating conditions.  
Overexcursion Protection  
A 12 dB/octave high-pass filter at 60 Hz just prior  
to the low-frequency amplifier prevents very low  
frequencies from being amplified. Excessive low-  
frequency energy below 60 Hz can damage the woofer by  
causing it to “bottom out,” also known as overexcursion,  
which is equivalent to a mechanical form of clipping.  
Input Signal Wiring  
You should use high-quality, shielded cable to  
connect the signal source to the INPUT jack on the  
TH-12A.  
• High quality microphone cables work well.  
Thermal Protection  
• Foil shielded cables are commonly used for audio  
All amplifiers produce heat. The TH-12A is designed  
to be efficient both electrically and thermally.  
wiring.  
• The better the shield, the better the immunity  
from externally induced noise (like EMI and  
RFI). Route the cable away from AC power cords  
and outlets. These are common sources for hum  
in an audio signal. You can purchase quality  
cables from your Mackie dealer.  
The amplifier module is mounted on a large  
heatsink, which is cooled by convection where cool air  
is drawn over the rear panel, carrying the heat away.  
In order for this convection cooling to work efficiently,  
it is important to provide adequate airspace behind  
the loudspeaker. When you position the TH-12A, we  
recommend leaving at least six inches of air space  
behind it.  
Placement  
The TH-12A loudspeaker is designed to sit on the  
floor or stage. It may also be pole-mounted via the  
built-in socket on the bottom of the cabinet. Be sure the  
pole is capable of supporting the weight of the TH-12A.  
• If for some reason the internal temperature  
gets too hot, a built-in thermal switch activates  
and turns off the amplifier. This protection  
operates independently for the low-frequency and  
high-frequency amplifiers. Therefore, it is possible  
for only the low frequency or high frequency  
amplifier to shut down while the other remains on.  
WARNING: The cabinet has no rigging  
points and is not suitable for rigging.  
NEVER attempt to suspend the TH-12A by  
its handles.  
• When the amplifier cools down to a safe  
temperature, the thermal switch resets  
and normal operation resumes.  
As with any powered components, protect them from  
moisture. If you are setting them up outdoors, make  
sure they are under cover if you expect rain.  
10  
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Appendix A: Service Information  
If you think your Mackie product has a problem,  
please check out the following troubleshooting tips and  
do your best to confirm the problem. Visit the Support  
ideas or contact our technical support heroes. You may  
find the answer to the problem without having to send  
your Mackie product away.  
4. Replace the fuse drawer by pushing it all the way  
back into the IEC socket.  
If two 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.  
Troubleshooting  
No Sound  
• Are the power LEDs on the front and rear panel  
illuminated?  
No Power  
• Our favorite question: Is it plugged in?  
• Make sure the line cord is securely seated in the  
line cord socket and plugged all the way into the  
AC outlet.  
• Make sure the AC outlet is live (check with a  
tester or lamp).  
• Is the POWER switch in the ON position?  
• Are the power LEDs on the front and rear panel  
illuminated? If not, make sure the AC outlet is  
live. If so, refer to “No Sound” below.  
• If the power LEDs are not illuminated, and you  
are certain that the AC outlet is live, it is possible  
the fuse has blown.  
• Is the LEVEL control turned up?  
• Is the signal source turned up? Make sure the  
signal level from the mixing console (or whatever  
device immediately precedes the loudspeaker) is  
high enough to produce sound.  
• If it’s a stereo pair, try switching them around.  
For example, if a left speaker is presumed dead,  
switch the left and right cords at the speakers. If  
the problem switches sides, it’s not the TH-12A. It  
could be a bad cable, or no signal from the mixer.  
Bad Sound  
To remove and replace the fuse:  
• Is the input connector plugged completely into  
the INPUT jack?  
1. Disconnect the power cord from the IEC socket.  
2. Remove the fuse drawer by prying it open with  
a small screwdriver. It will slide all the way out.  
• Is something connected to the THRU jack? Try  
unplugging it. If the sound improves, whatever  
was plugged into the THRU jack may have  
affected the signal.  
• Is it loud and distorted? Reduce the signal level at  
the mixer.  
• If possible, listen to the signal source with  
headphones plugged into the preamp stage. If it  
sounds bad there, it’s not the loudspeaker.  
FUSE  
• Too much bass or not enough bass? Move  
around the room and see if the bass response  
changes. It’s possible your listening position  
coincides with a room mode where the  
low frequencies either become exaggerated or  
nulled. If so, try moving the loudspeakers to a  
different position, or moving your listening  
position.  
3. Remove the fuse and replace it with an  
equivalent-type fuse.  
115 VAC unit: 6.3 amp slo-blo (T6.3AL/250 V)  
230 VAC unit: 3.15 amp slo-blo (T3.15AL/250 V)  
11  
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Noise/Hum  
Appendix B: Connections  
• Check the signal cable between the mixer and  
the loudspeaker. Make sure all connections are  
secure. These problems usually produce crackling  
noises or hum.  
XLR Connectors  
XLR connectors are used to make balanced input  
and through connections to the TH-12A. They are wired  
as follows, according to standards specified by the AES  
(Audio Engineering Society).  
• If you are using two or more TH-12A powered  
loudspeakers, try plugging them all into the same  
AC outlet panel or outlet strip. The purpose for  
this is to connect them all to the same earth  
ground point and reduce the possibility of creating  
a ground loop.  
XLR  
Hot (+) Pin 2  
Cold (–)Pin 3  
Shield (Ground)Pin 1  
• If connecting an unbalanced output to the TH-12A  
balanced input, make sure the shield is connected  
to the unbalanced ground and to pin 1 of the XLR.  
2
SHIELD  
HOT  
Repair  
1
3
COLD  
For warranty service, refer to the warranty  
information on page 16.  
SHIELD  
1
3
COLD  
2
HOT  
Non-warranty service for Mackie products is  
available at a factory-authorized service center. To  
locate your nearest service center, call our Tech  
Support department at 1-800-898-3211, Monday-Friday,  
during normal business hours, Pacific Time, to explain  
the problem. Tech Support will tell you where the  
nearest factory-authorized service center is located in  
your area.  
SHIELD  
COLD  
HOT  
1
3
2
Balanced XLR Connectors  
Need help with your new loudspeaker?  
• Email us at: [email protected].  
Telephone 1-800-898-3211 to speak with one of our splendid technical support chaps (Monday  
through Friday, normal business hours, PST).  
12  
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Appendix C: TH-12A Specifications  
Acoustic Performance  
Equalization  
Frequency Range (–10 dB):  
Frequency Response (–3 dB):  
Horizontal Coverage Angle:  
Vertical Coverage Angle:  
57 Hz – 20 kHz  
Low Frequency EQ:  
Mid Frequency EQ:  
15 dB @ 80 Hz, shelving  
15 dB, bandpass,  
sweepable from100 Hz to  
8 kHz  
70 Hz – 18.5 kHz  
90º  
60º  
High Frequency EQ:  
Direct/EQ Switch:  
15 dB @ 12 kHz,  
shelving  
Maximum SPL Long-Term:  
Maximum SPL Peak:  
117 dB SPL @ 1m  
120 dB SPL @ 1m  
Bypasses EQ section  
Input/Output  
Input Type:  
Protection Features  
Over-excursion Protection:  
Female XLR Balanced /  
Unbalanced  
Second-order sub-sonic  
filter  
Input Impedance:  
Loop-through:  
20 k balanced  
bridging;  
10 k unbalanced  
Thermal Protection:  
Driver Protection:  
Independent amplifier  
shutdown, auto reset  
Independent HF and LF  
compressors  
Male XLR Balanced /  
Unbalanced  
(parallel with input)  
Level Control:  
Sensitivity:  
Rotating knob  
0 dB at center  
AC Power Requirements  
US:  
100 – 120 VAC,  
50 – 60 Hz 320 watts  
+4 dBu for full output  
(Level Control @ Center)  
EU:  
200 – 240 VAC,  
50 – 60 Hz 320 watts  
–36 dBu for full output  
(Level Control @ Max)  
AC Connector:  
3-pin IEC 250 VAC,  
20 A male  
Transducers  
Low Frequency:  
Construction Features  
Basic Design:  
Material:  
12 in / 305 mm with  
steel frame, paper cone  
woofer  
Trapezoidal  
Polypropylene  
Textured  
High Frequency:  
Horn-loaded 1 in /  
25 mm exit compression  
driver  
Finish:  
Handles:  
One on each side, one on  
top  
Grille:  
Perforated metal with  
weather-resistant coating  
Power Amplifiers  
Low Frequency Power Amplifier  
Display LEDs  
Front:  
Rated Power:  
150 watts, 8 ohm load  
300 watts peak  
Power ON  
Rear:  
Power ON, OL (overload)  
Signal-to-Noise Ratio:  
Operating Temperature:  
0˚ – 40˚C  
32˚ – 104˚F  
>94 dB, 20 Hz to 20 kHz, unweighted,  
referenced to 138 watts into 8 ohms  
BTL Class D  
Design:  
Physical Dimensions and Weight  
Dimensions  
High Frequency Power Amplifier  
Rated Power:  
50 watts, 4 ohm load  
100 watts peak  
Height:  
23.5 in / 596 mm  
14.5 in / 367 mm  
12.4 in / 314 mm  
25.5 lb / 11.6 kg  
Width:  
Signal-to-Noise Ratio:  
Depth:  
>97 dB, 20 Hz to 20 kHz, unweighted,  
referenced to 50 watts into 4 ohms  
Class AB  
Weight:  
Mounting Methods:  
Design:  
Pole-mountable via the built-in socket on the  
bottom of the cabinet. Be sure the pole is  
capable of supporting the weight of the TH-12A.  
Electronic Crossover  
Crossover Type:  
13  
24 dB/octave  
3 kHz  
Crossover Frequency:  
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TH-12A Dimensions  
WEIGHT  
25.5 lb  
11.6 kg  
14.1 in /  
357 mm  
23.5 in /  
596 mm  
22.8 in /  
579 mm  
6.3 in /  
160 mm  
6.0 in /  
152 mm  
20.6 in /  
522 mm  
CONTOUR EQ  
14.5 in /  
367 mm  
12.4 in /  
314 mm  
TH-12A Frequency Response  
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TH-12A Block Diagram  
LOUD Technologies Inc. is always striving to improve our products  
by incorporating new and improved materials, components, and  
manufacturing methods. Therefore, we reserve the right to change  
these specifications at any time without notice.  
“Mackie,” and the “Running Man” are registered trademarks of LOUD  
Technologies Inc. All other brand names mentioned are trademarks  
or registered trademarks of their respective holders, and are hereby  
acknowledged.  
©2011 LOUD Technologies Inc. All Rights Reserved.  
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Mackie Limited Warranty  
Please keep your sales receipt in a safe place.  
This Limited Product Warranty (“Product Warranty”) is provided by LOUD Technologies Inc. (“LOUD”)  
and is applicable to products purchased in the United States or Canada through a LOUD-authorized  
reseller or dealer. The Product Warranty will not extend to anyone other than the original purchaser of  
the product (hereinafter, “Customer,” “you” or “your”).  
For products purchased outside the U.S. or Canada, please visit www.mackie.com/warranty to find  
contact information for your local distributor, and information on any warranty coverage provided 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 product fails to conform to the warranty then LOUD  
or its authorized service representative will at its option, either repair or replace any such nonconforming  
product, provided that Customer gives notice of the noncompliance within the Warranty Period to the  
Company at: www.mackie.com/support or by calling LOUD technical support at 1.800.898.3211 (toll-  
free in the U.S. and Canada) during normal business hours Pacific Time, excluding weekends or LOUD  
holidays. Please retain the original dated sales receipt as evidence of the date of purchase. You will need it  
to obtain any warranty service.  
For full terms and conditions, as well as the specific duration of the Warranty for this product, please visit  
www.mackie.com/warranty.  
The Product Warranty, together with your invoice or receipt, and the terms and conditions located  
at www.mackie.com/warranty constitutes the entire agreement, and supersedes any and all prior  
agreements between LOUD and Customer related to the subject matter hereof. No amendment,  
modification or waiver of any of the provisions of this Product Warranty will be valid unless set forth in a  
written instrument signed by the party to be bound thereby.  
Correct Disposal of this product: This symbol indicates that this product should not be disposed of with your household waste, according to the WEEE  
Directive (2002/96/EC) and your national law. This product should be handed over to an authorized collection site for recycling waste electrical and  
electronic equipment (EEE). Improper handling of this type of waste could have a possible negative impact on the environment and human health due  
to potentially hazardous substances that are generally associated with EEE. At the same time, your cooperation in the correct disposal of this product will  
contribute to the effective usage of natural resources. For more information about where you can drop off your waste equipment for recycling, please  
contact your local city office, waste authority, or your household waste disposal service.  
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16220 Wood-Red 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  
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