American Audio Mixer QSpand Pro User Manual
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Q-SPAND PRO
Featuring:
4295 Charter Street
Los Angeles Ca. 90058
www.AmericanAudio.us
User Guide
and Reference Manual
12/06
©American Audio® - www.americanaudio.us - Q-SPAND PRO Instruction Manual Page 2
MAIN FEATURES....................................................................................................................................2
ELECTRICAL PRECAUTIONS................................................................................................................4
SAFETY PRECAUTIONS........................................................................................................................5
INTRODUCTION.............................................................. ......................................................................6
SET-UP PRECAUTIONS.........................................................................................................................6
UNPACKING.........................................................................................................................................7
QUICK START...........................
.............................................................................................................7
FUNCTIONS AND CONTROLS
FRONT PANEL....................................
.........................................................................................8
REAR PANEL........................
.....................................................................................................13
CLEANING.............. .......................... ........................... ................................................... 18
CROSSFADER REPLACEMENT.........
..................................................................................................18
TROUBLESHOOTING...................................................................................................................... 19
WARRANTY............................................................... ..........................................................................20
SPECIFICATIONS ................................................... ..................................................................21
Q-SPAND PRO CONTENTS
• VCA Fader for Q-Start Control
• Adjustable Crossfader Curve - For Personaliza-
tion
• Single Voltage or Dual Voltage
• 3 Phono/4 Aux, 4 Line, & 3 Mic Inputs
• Q-Start Compatible (for use with American
Audio CD Players with Fader “Q” Start)
• Fader “Q” Start on channels 1 & 2
• Separate gain control for each channel
• High output to headphones
• Balanced XLR Output
• WOW Process • Extremely clean signal to noise ratio
• Talk Over Button - Reduces channel output
gain by 14dB +/- 2 dB
• LED Level Indicators -
Indicates Master Level and Channel Levels
• Master Output Balance Control
• Split Cue Monitoring
• Cue Mixing
• Independent ZONE Output Level
• 12v Gooseneck Light Option
• -30dB Rotary Kills for Treble, Bass and
Mids on all channels
Q-SPAND PRO FEATURES
©American Audio® - www.americanaudio.us - Q-SPAND PRO Instruction Manual Page 3
NOTE: This product satisfies FCC
regulations when shielded cables
and connectors are used to con
-
nect the unit to other equipment.
To prevent electromagnetic inter
-
ference with electrical appliances
such as radios and televisions, use
shielded cables and connectors
for connections.
WARNING: TO PREVENT FIRE OR ELECTRIC
SHOCK HAZARD, DO NOT EXPOSE THIS
UNIT TO RAIN, LIQUIDS, OR MOISTURE
CAUTION: TO PREVENT ELECTRIC SHOCK
DO NOT USE THIS (POLARIZED) PLUG WITH
AN EXTENSION CORD, RECEPTACLE, OR
OTHER TYPE OF ELECTRICAL OUTLET
UNLESS THE WIDE BLADES CAN BE
CAREFULLY INSERTED INTO A MATCHING
WIDE SLOT.
ATTENTION: POUR PREVENIR LES CHOCS
ELECTRIQUES NE PAS UTILISER CETTE
FICHE POLARISEE AVEC UN PROLON-
GATEUR, UNE PRISE DE COURANT OU
UNE AUTRE SORTIE DE COURANT, SAUF
SI LES LAMES PEUVENT ETRE INSEREES A
FOND SANS EN LAISSER AUCUNE PARTIE A
DECOUVERT.
Q-SPAND PRO ELECTRICAL SAFETY PRECAUTIONS
VOLTAGE SELECTOR SWITCH
LINE VOLTAGE SELECTION
For Dual Voltage models only!
• The desired voltage may be set with the
VOLTAGE SELECTOR switch on the rear
panel (using a flat head screw driver).
• Do not force the VOLTAGE SELECTOR
switch as this may cause damage
• If the VOLTAGE SELECTOR switch does
not move smoothly, please contact a quali-
fied service technician.
The serial and model number for this unit is
located on the rear panel. Please write down
the numbers here and retain for future refer
-
ence.
Model No._____________________________
Serial No._____________________________
Purchase Notes:
Date of Purchase_______________________
Dealer Name__________________________
Dealer Address_________________________
_____________________________________
_____________________________________
Dealer Phone__________________________
©American Audio® - www.americanaudio.us - Q-SPAND PRO Instruction Manual Page 4
ELECTRICAL PRECAUTIONS
RISK OF ELECTRIC SHOCKDO NOT OPEN
CAUTION
The exclamation point within an equilateral triangle is
intended to alert the user to the presence of important
operating and maintenance (servicing) instructions in
the literature accompanying the appliance.
The lightning flash with arrowhead symbol, within anequilateral triangle, is intended to alert the user to thepresence of uninsulated "dangerous voltage" within the
product's enclosure that may be of sufficient magnitude
to constitute a risk of electric shock to persons.
READ INSTRUCTIONS — All the safety and operating
instructions should be read before the product is
operated.
RETAIN INSTRUCTIONS — The safety and operatin
g
instructions should be retained for future reference.
HEED WARNINGS — All warnings on the product andin the operating instructions should be adhered to.
FOLLOW INSTRUCTIONS — All operating and use
instructions should be followed.
CLEANING
— T he product should be cleaned only witha polishing cloth or a soft dry cloth. Never clean withfurniture wax, benzine, insecticides or other volatile
liquids since they may corrode the cabinet.A TTACHMENTS — Do not use attachments not
recommended by the product manufacturer as they
may cause hazards.
WATER AND MOISTURE
— Do not use this product
near water — for example, near a bathtub, wash
bowl, kitchen sink, or laundry tub; in a wet basement;
or near a swimming pool; and the like.
ACCESSORIES
— Do not place this product on an
unstable cart, stand, tripod, bracket, or table. The
product may fall, causing serious injury to a child oradult, and serious damage to the product. Use onlywith a cart, stand, tripod, bracket, or table
recommended by the manufacturer, or sold with
the product. Any mounting of the product shouldfollow the manufacturer’s instructions, and should
use a mounting accessory recommended by the
manufacturer.
CART — A product and cart combination should be
moved with care. Quick stops, excessive force, and
uneven surfaces may cause the product and cart
combination to overturn.
VENTILATION
— Slots and openings in the cabinet are
provided for ventilation and to ensure reliable
operation of the product and to protect it from
overheating, and these openings must not be
blocked or covered. The openings should never be
blocked by placing the product on
a bed, sofa, rug,
or other similar surface. This product should not be
placed in a built-in installation such as a bookcase or
rack unless proper ventilation is provided or the
manufacturer’s instructions have been adhered to.
POWER SOURCES — This product should be operated
only from the type of power source indicated on the
marking label. If you are not sure of the type of
power supply to your home, consult your product
dealer or local power company.
LOCATIO
N – The appliance should be installed in a
stable location.
NONUSE PERIOD
S – The power cord of the appliance
should be unplugged from the outlet when left un-
used for a long period of time. GROUNDING OR POLARIZATION
•
If this product is equipped with a polarized alternating
current line plug (a plug having one blade wider than
the other), it will fit into the outlet only one way. Thisis a safety feature. If you are unable to insert the plugfully into the outlet, try reversing the plug. If the plug
should still fail to fit, contact your electrician to
replace your obsolete outlet. Do not defeat the
safety purpose of the polarized plug.
• If this product is equipped with a three-wire
grounding type plug, a plug having a third (grounding)
pin, it will only fit into a grounding type power outlet.
This is a safety feature. If you are unable to insert the
plug into the outlet, contact your electrician to
replace your obsolete outlet. Do not defeat the
safety purpose of the grounding type plug.
POWER-CORD PROTECTION
- Power-supply cords
should be routed so that they are not likely to be
walked on or pinched by items placed upon or
against them, paying particular attention to cords at
plugs, convenience receptacles, and the point where
they exit from the product.
OUTDOOR ANTENNA GROUNDING — If an outside
antenna or cable system is connected to the product,
be sure the antenna or cable system is grounded so
as to provide some protection against voltage surges
and built-up static charges. Article 810 of the National
Electrical Code, ANSI/NFPA 70, provides informatio
nwith regard to proper grounding of the mast and
supporting structure, grounding of the lead-in wire
to an antenna discharge unit, size of grounding
conductors, location of antenna-discharge unit,
c o n n e c t i o n t o g r o u n d i n g e l e c t r o d e s , a n d
requirements for the grounding electrode. See Figure
A.
LIGHTNING
— For added protection for this product
during a lightning storm, or when it is left unattended
and unused for long periods of time, unplug it from
the wall outlet and disconnect the antenna or cable
system. This will prevent damage to the product
due to lightning and power-line surges.
POWER LINES
— An outside antenna system should
not be located in the vicinity of overhead power lines
or other electric light or power circuits, or where it
can
fall into such power lines or circuits. When
installing an outside antenna system, extreme care
should be taken to keep from touching such power
lines or circuits as contact with them might be fatal.OVERLOADING — Do not overload wall outlets,
extension cords, or integral convenience receptacles
as this can result in a risk of fire or electric shock. OBJECT
AND LIQUID ENTRY
- Never push objects of
any kind into this product through openings as they
may touch dangerous voltage points or short-out
parts that could result
in a fire or electric shock.
Never spill liquid of any kind on the product.
SERVICING — Do not attempt to service this product
yourself as opening or removing covers may expose
you
to dangerous voltage or other hazards. Refer all
servicing to qualified service personnel.
DAMAGE REQUIRING SERVICE - Unplug this product
from the wall outlet and refer servicing to qualified
service personnel under the following conditions:
• W hen the power-supply cord or plug is damaged.
•If liquid has been spilled, or objects have fallen into
the product.• If the product has been exposed to rain or water.•If the product does not operate normally by following
the operating instructions. Adjust only those controls
that are covered by the operating instructions as an
improper adjustment of other controls may result
in
damage and will often require extensive work by a
qualified technician to restore the product to its
normal operation.
•If the product has been dropped or damaged in anyway.
• W hen the product exhibits a distinct change in
performance — this indicates a need for service.
REPLACEMENT PARTS
-- When replacement parts
are required, be sure the service technician has used
replacement parts specified by the manufacturer or
have the same characteristics as the original part.
Unauthorized substitutions may result in fire, electri
c
shock, or other hazards.
SAFETY CHECK
- Upon completion of any service or
repairs to this product, ask the service technician to
perform safety checks to determine that the product
is in proper operating condition.
WALL OR CEILING MOUNTING
— The product should
not be mounted to a wall or ceiling.
HEAT
— The product should be situated away from heat
sources such as radiators, heat registers, stoves, or
other products (including
amplifiers) that produce
heat.
IMPORTANT SAFETY INSTRUCTIONS
ANTENNA
LEAD IN
WIRE
GROUND
CLAMP
ANTENNA
DISCHARGE UNI
T
(NEC SECTION 810-20)
GROUNDING CONDUCTOR
S
(NEC SECTION 810-21)
GROUND CLAMPS
POWER SERVICE GROUNDING
ELECTRODE SYSTEM
(NEC ART 250, PART H)
ELECTRIC
SERVICE
EQUIPMENT
Fig.
A NEC — NATIONAL ELECTRICAL CODE
C A U T I O N : T O R E D U C E T H E R I S K O F E L E C T R I C
SHOCK, DO NOT REMOVE THE COVER (OR BACK).
T H E R E A R E N O U S E R S E R V I C E A B L E P A R T S
INSIDE REFER SERVICE TO YOUR AUTHORIZED
AMERICAN AUDIO® SERVICE TECHNICIAN.
Q-SPAND PRO ELECTRICAL SAFETY PRECAUTIONS
©American Audio® - www.americanaudio.us - Q-SPAND PRO Instruction Manual Page 5
1. For adult use only - Keep out of the reach
of children.
2. Water and Moisture - The player should not
be used near water - for example, near a bath
tub, kitchen sink, laundry tub, in a wet
base-
ment or near a swimming pool, etc.
Do not
spill water or other liquids in to or on to your
mixer.
3. Ventilation - The Mixer should be situ
ated
so that its location or position does not inter
-
fere with its proper ventilation. For
example,
the Mixer should not be situated on a bed,
sofa, rug, or similar surface that may block the
ventilation openings; or, placed in a built-in
installation, such as a bookcase or cabinet that
may impede the flow of air through the ventila
-
tion openings.
4. Heat - The Mixer should be situated away
from heat sources such as radiators, heat reg
-
isters, stoves, or other appliances (including
amplifiers) that produce heat.
5. Power Sources - The Mixer should be con
-
nected to a power supply (
wall outlet) only of
the type described in the operating instructions
or as marked on the Mixer.
6. Servicing -The user should not attempt to
service the Mixer beyond that described in the
operating instructions. There are no user ser
-
viceable parts
inside. All other servicing should
be referred to qualified service personnel. The
Player should be serviced by qualified service
personnel when:
A. The power-supply cord or the plug has
been damaged.
B. Objects have fallen, or liquid has been
spilled into the Mixer.
C. The Mixer has been exposed to rain
or water.
D. The Mixer does not appear to operate
normally or exhibits a marked change
in performance.
7. Never disassemble or modify your unit in
any way, doing so will void your manufactures
warranty.
Q-SPAND PRO SAFETY PRECAUTIONS
8. Never plug this mixer in to a dimmer pack.
9. Do not let insecticides, benzene, or thinner
come in contact with the surface of the
unit.
10. This unit is intended for indoor use only, use
of this product outdoors voids all warranties.
11. Always mount this unit in safe and stable
matter.
12. Disconnect from main power before making
any type of connection.
13. Cleaning - The mixer should be cleaned
only as recommended by the manufacturer.
U se a soft cloth to wipe down the outside of the
unit.
For stubborn stains moisten a soft cloth
with glass cleaner or other mild detergent to
wipe
away any stains. Use a soft cloth to wipe
any
residual cleaner. Never use volatile clean-
ers such as benzene
, solvent, or thinner to clean
your
unit, these cleaners will damage the units
surface.
14. Handle the power supply cord carefully. Do
not damage or deform; it may cause electric
shock or malfunction when used. Hold plug
attachment when removing from wall outlet.
Do not pull on the cord.
15. To avoid electric shock, do not open the
top cover when the unit is plugged in. If prob
-
lems occur with the unit, call American Au
d io®
customer support.
16. Do not place metal objects or spill any liq
-
uids inside or on the mixer. Electric shock or
malfunction may occur.
17. Power Cord Protection - Power supply
cords should be routed so that they are not
likely to be walked on or pinched by items
placed upon or against them, paying particular
attention to cords at plugs, convenience recep
-
tacles, and the point where they exit from the
mixer. Route your power cord out of the way of
foot traffic.
18. Always have the front gain controls set to
their lowest level during initial power-up to pre
-
vent speaker damage.
©American Audio® - www.americanaudio.us - Q-SPAND PRO Instruction Manual Page 6 Introductions: Congratulations and thank you for purchasing the American Audio® Q-SPAND PRO mixer. This mixer is a representation of American Audio’s continuing commitment to produce the best and highest quality audio products possible at an affordable price. Please read and understand this manual completely before attempting to operate your new mixer. Please carefully read and understand the instructions in this manual thoroughly before attempting to operate this unit. These instructions contain important safety information regarding the use and maintenance of this unit. Take special care to follow all warning symbols and labels both on the unit and printed in this manual. Also, Please keep this manual with the unit, for future reference. Customer Support: American Audio ® provides a toll free customer support line, to provide set up help and answer any question should you encounter problems during your initial set up or operation. You may also visit us on the web at www.americanaudio.us for any comments or suggestions. Service Hours are Monday through Friday 9:00 a.m. to 5:30 p.m. Pacific Standard Time. Voice: (800) 322-6337 Fax: (323) 582-2941 E-mail: [email protected] To purchase parts online visit http://parts.americandj.com Caution! There are no user serviceable parts inside this mixer. Do not attempt any repairs yourself, without being instructed to do so by an authorized American Audio service technician. Doing so will void your manufactures warranty. In the unlikely event your mixer may require service, please contact American Audio® customer support. Do not discard the packing carton in the trash. Please recycle when ever possible. Q-SPAND PRO INTRODUCTION Q-SPAND PRO SET-UP PRECAUTIONS Please be sure to make any connections before plugging the mixer in to an electrical outlet. All fader and volume controls should be set to zero or minimum position, before the mixer is switched on. If the mixer has been exposed to drastic temperature fluctuation (e.g. after transportation), do not switch on the mixer immediately. The arising condensation of water might damage your device. Leave the device switched off until it has reached room temperature. Operating Determinations: • When installing this mixer, please make sure that the device is not exposed or will not be exposed to extreme heat, moisture or dust! • Do not operate the mixer in extremely hot (more than 30°/100°F) or extremely cold (less than 5°C/40°F) surroundings. • Keep the unit out of direct sunlight and away from heaters. • Operate the mixer only after becoming familiar with its functions. Do not permit operation by persons not qualified for operating the mixer. Most damages are the result of unprofessional operation! • Do not attempt to operate this mixer if the power cord has been frayed or damaged. • Disconnect from main power before making any type of connection. • Do not attempt to operate this mixer, if it becomes damaged in any way. • Never operate this mixer when it’s covers are removed. • To reduce the risk of electrical shock or fire, do not expose this mixer to rain or moisture. • This mixer is intended for indoor use only, use of this product outdoors voids all warranties. • During long periods of non-use, disconnect the mixer’s main power.
QUICK START: American Audio® would like to thank you for your purchase of this great audio product. For those of you that don't have the time to read the entire user manual we have compiled these quick start instructions. We hope that you will at least read through these instructions to familiarize yourself with the basics of this mixer. The Q-SPAND PRO is part of American Audio’s continuing evolution in audio technology. This unit has been built and designed to meet the needs of a typical DJ. We have attempted to provide you with the most reliable product on the market by using only components con - structed of the finest material. MASTER LEVEL - Use this level to control your main volume output. Try never to send an output of more than +4dB to your system. Signal at levels higher than this will start to distort and may cause damage to your system and speakers. Remember that a distorted signal from you mixer will only be multiplied throughout your system. CHANNEL GAIN LEVEL - The channel gain levels are not to be used as volume controls. Never use the channel trim to set the output volume. These controls are used to aid in distortion control. Use these control to preset your signal level before the crossfader. With your channel faders in the maxi - mum position, use the channel trim level to set an average output level of about +4dB on you master level meter. HEADPHONES - To avoid damaging your headphones always be sure the headphone volume level (31) is set to minimum before plugging them in. To avoid sever hearing damage, never put the head - phone on without making sure the headphone level is turned down. MAIN MIC - The main mic connector uses a combo plug that allows you to connect either a 1/4” unbalanced jack or by a standard 3-pin XLR balanced connector. The main mic also has an indepen - dent volume control. When feedback occurs when using the mic, try lowering the level this may reduce the feedback. Always leave the mic level to it’s minimum level when not in use. Note: We recommend that you use a 500-600ohm microphone for the best sound quality. PHONO/AUX LINE LEVEL SELECTOR SWITCH - This switch is used to change the selected input from phono to line and vice versa. The switch selectors are on the rear panel. Q-SPAND PRO QUICK START INSTRUCTIONS Q-SPAND PRO UNPACKING Every Q-SPAND PRO has been thoroughly tested and has been shipped in perfect operating condi- tion. Carefully check the shipping carton for damage that may have occurred during shipping. If the carton appears to be damaged, carefully inspect your mixer for any damage and be sure all equipment necessary to operate the mixer has arrived intact. In the event damage has been found or parts are missing, please contact our toll free customer support number for further instructions. Please do not return the mixer to your dealer without first contacting American Audio ® customer support. ©American Audio® - www.americanaudio.us - Q-SPAND PRO Instruction Manual Page 7
©American Audio® - www.americanaudio.us - Q-SPAND PRO Instruction Manual Page 8
Q-SPAND PRO FRONT PANEL - CONTROLS AND FUNCTIONS
1. MICROPHONE EQ SECTION -
MICROPHONE TREBLE CONTROL - This knob is used to adjust the treble levels of the
Microphone with a maximum signal gain of
+12 dB or maximum signal decrease of -30 dB. Turning the
knob in a counter-clockwise direction will decrease the amount of treble applied to the microphone
signal, turning the knob in a clockwis
e direction will increase the amount of treble applied to micro-
phone signal.
MICROPHONE BASS CONTROL
- This knob is used to adjust the low frequency levels of the
microphone with a maximum signal gain of
+12 dB or maximum signal decrease of -30 dB. Turning the
knob in a counter-clockwise direction will decrease the amount of bass applied to the microphone
signal, turning the knob in a clockwise direction will increase the amount of
bass applied to micro-
phone signal.
2. TALKOVER CONTROL - This function decreases all signal output except the microphone signal.
The amount of decrease is preset to -14dB and is not user selectable.
3. MICROPHONE 1 - This combo jack will accept a standard 1/4 plug or XLR 3-pin balanced male
plug. The volume output level for this microphone will be controlled by its own respective
VOLUME
KNOB
(31). Note: We recommend that you use a 500-600ohm microphone for the best sound
quality.
4. SOURCE SELECTOR SWITCH - These switches are used to select the input source assigned to
each channel. Each channel may only be assigned one input source at a time. This switch must be in
1
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15141312
111098765432
3130291920
the “phono” position for turntable operation.
5. CHANNEL GAIN CONTROL - This adjustment is used to adjust the audio source signal input gain
for a channel. Never use the gain control to adjust a channels output volume. Setting the gain level
properly will ensure a clean output signal. An improper gain level adjustment will send a distorted
signal throughout the entire audio line which may damage speakers and amplifiers. To properly set a
channels gain level control:
1. Be sure the MASTER VOLUME CONTROL (
22) is set to level 8.
2. Set the CHANNEL FADER (
25) to level 8.
3. Begin playback on an audio source connected to the channel you are adjusting.
4. Use the Gain Control to adjust an average output volume of +4 dB
.
5. Repeat this step for all channels
6. Q-START ON/OFF BUTTON - This function works in conjunction with a compatible American DJ®
or American Audio
® “Q” Start CD player. When used with a compatible CD player, you can use the
crossfader to start and stop a CD Player with the slide of the mixer’s CROSSFADER (
28). The ON/OFF
“Q" START BUTTTON activates the FADER “Q" START feature. When in the ON position (RED LED
WILL BE LIT)
, the FADER “Q" START automatically returns the CD player to the preset CUE POINT.
For example; Assuming you have two compatible American Audio™ CD players or a
compatible dual CD player connected to channels one and two. When the Fader "Q" Start
option is turned on, sliding the crossfader to the far left position will trigger playback on CD
player 1. When the crossfader is pushed to the far right position, playback on CD player 2 will
begin, and CD player 1 will return to the cue position. Refer to your American Audio CD player
user manual for setting CUE POINTS. Turn the ON/OFF BUTTON to the OFF position (RED
LED IS NOT LIT)
to disengaged “Q” Start function and resume to a normal fader.
7. CHANNEL EQ SECTION -
CHANNEL TREBLE CONTROL - This knob is used to adjust the treble levels of a channel
allowing for a maximum treble gain of
+ 12 dB or maximum decrease of -30dB. Turning the knob in a
counter-clockwise direction will decrease the amount of treble applied to a channel signal,
turning the
knob in a clockwise direction will increase the amount of treble applied to a channel signal.
CHANNEL MIDRANGE CONTROL - This knob is used to adjust the midrange levels of a chan-
nel allowing for a maximum midrange gain of +12 dB or maximum decrease of -30dB. Turning the knob
in a counter-clockwise direction will decrease the amount of midrange
applied to a channel signal,
turning the knob in a clockwise direction will increase the amount of midrange applied to a channel
signal.
CHANNEL BASS CONTROL - This knob is used to adjust the low frequency levels of a channel
allowing for a maximum bass gain of
+12 dB or maximum signal decrease of -30dB. Turning the knob
in a counter-clockwise direction will decrease the amount of bass applied to a channel
signal, turning
the knob in a clockwise direction will increase the amount of bass applied to a channel signal.
8. CHANNEL VOLUME LEVEL INDICATORS - The LED indicators that run along each channels EQ
section are used to measure incoming signal levels. Use these indicator to visually maintain an average
signal output of +4dB. A consistent average output level of +4dB will produce a clean output signal.
9. MASTER VOLUME LEVEL INDICATORS - The dual MASTER LEVEL LED indicators are used to
detail the master fader output level. The meter s will detail the output level of both the left and right
channels.
10 . MASTER OUTPUT BALANCE CONTROL - This knob is used to control the pan, adjust how much
©American Audio® - www.americanaudio.us - Q-SPAND PRO Instruction Manual Page 9
Q-SPAND PRO FRONT PANEL - CONTROLS AND FUNCTIONS CONT.
©American Audio® - www.americanaudio.us - Q-SPAND PRO Instruction Manual Page 10 Q-SPAND PRO FRONT PANEL - CONTROLS AND FUNCTIONS CONT. of the signal is sent to the left and right output level. For true stereo imaging, maintain the knob in the 12 o’ clock position. 11. BNC JACK - This jack is used to supply a 12V DC signal to a gooseneck light, such as the American Audio ® GNL-14. 12. POWER SWITCH - This is the main power ON/OFF button. A blue LED next to the power switch will glow when power is ON. Before you turn the power on be sure you have made all connections to the mixer. Also be sure you amplifiers are turned off. Remember mixer on first and turned off last. 13 . WIDTH CONTROL - This knob is used to control the amount of SRS 3D process is applied to the output source signal. 14 . 3D ST CONTROL - This button is used to activate the SRS® (Sound Retrieval System®) 3D Stereo Process. SRS retrieves the spatial information from recordings and restores the original three-dimen - sional sound field. As a result, the reproduced sound is much closer to a live performance. Like live performances, SRS has no critical listening position (sweet spot). Listeners can move around the room and continue to be immersed in full three-dimensional sound. A microphone does not possess the ability to interpret the direction a sound is coming from in the same way that the human ear does. How - ever, when the audio source is recorded, directional audio cues are still present in the recording. By breaking down the stereo signal into its various signal components, it is possible to isolate and restore these spatial cues and place them in the proper space relative to the direct sounds, such as a soloist or dialogue. These spatial cues are restored by the use of Head Related Transfer Functions (HRTFs), which process ambient sounds via patented frequency response correction curves. 15 . TRU BASS CONTROL - This button is used to activate the SRS ® (Sound Retrieval System®) TRU BASS™ Process. TruBass circuity actively monitors the low-frequency content of an audio signal and optimizes the frequency and amplitude spectrum of the output signal to enhance bass perception. Whether you are limited by space, cost or implementation, for bass previously believed impossible. This process creates deep, rich bass in headphones and speaker systems that have poor or little bass response. Sub-woofer performance will be enhanced substantially. Unprecedented bass response will virtually eliminates the need for large speakers to create low frequency fundamental tones and will in several case eliminate the need for a sub-woofer all together. Be sure that the TRU BASS™ process will not color the midrange or create bass not present on recordings. This process will only define any bass present on a recording. 16 . TRUE BASS LEVEL - This knob is used to control the amount of "TRU BASS" process is applied to the output source signal. 17 . WOW CONTROL - This button is used to activate the SRS® WOW Process created by SRS Labs. The WOW™ process is a combination of 3D Stereo Process and the TRU BASS™ Process. WOW cre - ates extraordinary enhancement to the listening experience. Ordinary stereo presents a limited spatial presentation, and often lack-luster bass (low frequency) performance. Any sound system can deliver an audio performance with drastically improved image size, dynamics and immersion when playing a signal processed with WOW. Because the WOW™ effect combines the 3D Stereo™ Process and the TRU BASS™ Process, t he processing of the spatial cues surrounds the listener with a holographic representation of the performance. In addition bass becomes deep, rich and controlled through means that don’t require a speaker with a large woofer or cabinet size. In essence you may eliminate the need of a separate sub-woofer. 18. AUX 4 INPUT JACK - This Aux input is for the use of a Mp3 player, or XM or Sirius satellite radio. Input volume will be controlled by the channel four fader.