Acoustic Image Ten2 EX User manual

Ten2
Clarus
Coda
Corus
IMPORTANT SAFETY INSTRUCTIONS
FCC COMPLIANCE NOTICE
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
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 pinched particularly at plugs,
convenience receptacles, and the point where they exit from the apparatus.
11) Use only 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 apparatus.
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.
This device complies with part 15 of the FCC rules. Operation is subject to the
following two conditions: (1) This device may not cause harmful interference,
and (2) this device must accept any interference received, including
interference that may cause undesired operation.
CAUTION: Changes or modifications not expressly approved by the party
responsible for compliance could void the user’s authority to operate the
equipment.
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 equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in accordance with the
instruction manual, 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
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.

Welcome
The Basics 1
Operation--Electronics 3
Power 3
Preamp 3
Inputs 3
Controls 4
5
Stereo Operation 6
9
Headphone Output 9
Limiter Switch 9
Power Amp 10
Connecting a Speaker 10
Operation with No Speaker 10
Operation--Speaker Cabinets 11
Docking System 11
Speaker Placement 11
Tilt Mechanism 11
Connection an Extension Speaker 12
Presence Switch 12
Description of the Corus Combo 12
Tweeter Level Control 13
Room Coupling Control 13
Description of the Ten2 EX 13
Care 16
Warranty And Repair 16
Low Cut Filter/Phase Reverse
Effects Loop 5
Direct Out 6
Mute Switch 6
Control Panel Drawings 7
Signal Flow Diagram 7
Effects
Specifications 14
Shoulder Strap 15
Contents
The information in this manual is subject to change without notice. No part of this manual may be
reproduced by mechanical, electronic or other means in any form without prior written permission from
Acoustic Image.
The Acoustic Image logo is a registered trademark ofAcoustic Image LLC. Coda, Corus, Coda EX , Corus
EX, Ten 2, Ten2 EX, Clarus and Cabrio Docking System are trademarks of Acoustic Image LLC.
1
Welcome to Acoustic Image!
You have purchased a state-of-the-art musical instrument amplifier
system, combining purity, power and portability in a package that sets
a new standard in high fidelity amplification.
Each of our designs is engineered to accurately reproduce the sound
of acoustic and electric instruments, delivering flat frequency
response across the entire musical spectrum; extended, tight, well-
controlled bass; and complete clarity of sound reproduction.
This manual provides operating information for your Acoustic Image
Clarus head; Coda, Corus and Ten2 combo; and Coda EX, Corus EX
and Ten2 EX extension cabinet.
The Basics
Our Series 4 product line consists of two amp heads, and three
speaker cabinets. The heads mount in the cabinets using our
exclusive Cabrio Docking System to form six different combo amps.
The amp heads use the same superb class-D power amplifier with a
switch mode power supply and a sophisticated, sensitive preamplifier
with one or two channels. The speaker cabinets have a 1x10 or 2x10
speaker configuration. The features of the preamp and the speaker
configuration define the specific head or combo model. The Clarus
amp head combines the power amp with either a one channel or two
channel preamp. The Coda combo has a 1x10 speaker configuration
with a poly cone woofer. The Corus combo has a 1x10 speaker
configuration with a paper cone woofer. Both have a 5 inch extended
range driver with presence control in addition to the woofer and both
are available with a one or two channel head. The Ten2 combo uses a
2x10 speaker configuration (one downfiring, one front firing) with poly
cone woofers in conjunction with a 2.5 inch tweeter. The Ten2 is
available with a one or two channel head. Each cabinet type is also
available as an extension speaker in either a “Cabrio-ready”
configuration or as a fixed extension cabinet (Coda EX, Corus EX or
Ten2 EX).
The Clarus integrated amplifier uses our 600W power amp and a one
or two channel preamp. The power amp is a high efficiency design that
requires no external heat sinks or cooling fans and is capable of
driving loads as low as 2 ohms. The rated output is 600W at 4 ohms.
AC power and output speaker jacks are located on the rear of the
chassis. A standard, three-prong detachable AC power cord is used
to provide power to the unit, while an AC voltage selection switch
allows the unit to operate at 100 to 120V (50 or 60 Hz) or 220 to 240V
(50 Hz). The input channels of both preamp types incorporate combo
jack interfaces that allow either a high impedance instrument input (to
optimize the sound of piezo-type pickups) or a mic input with a
switchable 10 dB pad, a three-band EQ, an effects loop with return
level control, a selectable low cut filter and phase reverse switch for
feedback control and reduction of low frequency boominess, a six-
program effects unit with wet/dry mix control, a direct out capability
with ground lift and pre/post EQ switch, a master level control and a

mute switch. The two-channel preamp has a switch that allows the
second channel to be disconnected from the main amp and
connected to a satellite power amp to create a stereo system.
The Coda, Corus and Ten2 combo amps use either the one channel or
two channel Clarus head mounted in a speaker cabinet via the
docking system. The Coda and Corus use the same cabinet and
speaker configuration: a 10 inch downfiring woofer and a 5 inch front
firing extended range driver with a presence control. The difference
between the two is the woofer. The Coda uses a poly cone woofer, the
Corus uses a paper cone woofer. This gives the Corus a somewhat
different sound, one more suited for guitar. The Ten2 has the same
amp options but uses a slightly larger cabinet than the Coda/Corus. It
has a downfiring 10 and a front firing 10 with a 2.5 inch tweeter for high
frequencies A built-in, spring-loaded tilt mechanism allows each
cabinet type to be tilted back to better direct sound to your listening
position. The cabinets are made of an acoustically inert, high
durability, injection molded polymer material which dramatically
reduces the weight of the unit. Each unit (combo or extension cab)
comes with a fitted slip cover and shoulder strap. A padded case is
also available.
While our combos and speakers are designed to play loudly--and
clearly--enough so that you can be heard in most gigging situations,
they are not suited to playing at extreme volumes. Generating high
SPLs may require an extension cabinet like the Coda EX, Corus EX,
Ten2 EX or augmentation by a larger house system.
The instructions that follow apply to all of the products due to the many
common elements in the different units. Where there are specific
differences that are unique to one or more units, those differences are
described as necessary. The one and two channel amp heads are
described first followed by the common elements of the combo amps
(docking system, tilt mechanism, cabinet placement, etc). The
specifics of each cabinet type are then described followed by detailed
specifications of all of the models.
2
Operation--Electronics
Clarus Rear Panel
Coda, Corus and Ten2 Rear Panel
(shown in the docked position)
3
Power
Preamp
Plug the detachable AC power cord into the receptacle on the back of
the amp and into a wall receptacle. A power switch next to theAC input
turns on power to the pre- and power amps, illuminating a “power on”
indicator on the front panel of the amp.
Note
that a spare fuse is mounted inside the drawer.
All combos will work with either 100 to 120 volt, 50/60 Hz or 220 to 240
volt, 50 Hz AC power. A switch located on the rear panel selects the
appropriate voltage. Use the 115V setting for 100 to 120V operation,
use the 230V setting for 220 to 240V operation. Note that the correct
AC power cord must be used for connection to the appropriate wall
plug. If you do not have the right cord, you can buy one from an
electronics or computer store. Be sure the switch is in the correct
position for the intended application.
Combo jacks are used for the input to each channel of their preamp.
Either an XLR or 1/4 inch connector can be plugged into this type of
jack. The 1/4 inch input has a 1 megohm input impedance that is
A 6.3-amp fast blow fuse is
mounted in the drawer marked with the fuse symbol that is part
of the AC receptacle. To replace the fuse, turn off the amp,
remove the AC cord and use a small screwdriver to pry the
drawer out of the receptacle. Remove and replace the fuse.
Operation at 230 volts with the
switch in the 115 volt position will damage the unit.
Inputs
Refer to the signal flow diagram and the control panel drawings (page
6).
Voltage Switch
115/230V
AC Input
115/230 V
50/60 Hz
400 Watts
~
Speaker Output 2 minW
Headphone
Output
Limiter
On
Power Switch Fuse
CAUTION: TO REDUCE THE
RISK OF FIRE, REPLACE FUSE
WITH THE SAME TYPE 6.3A FAST
BLOW FUSE (F 6.3A H 250V)
CAUTION: TO REDUCE THE
RISK OF ELECTRIC SHOCK,
DO NOT REMOVE COVER.
NO USER SERVICEABLE PARTS
INSIDE. REFER SERVICING
TO QUALIFIED PERSONNEL.
Voltage Switch
115/230V
Speaker Output 2 minW
Limiter
On
Speaker Input
8 300WWPresence Headphone
Output
Power Switch Fuse
CAUTION: TO REDUCE THE
RISK OF FIRE, REPLACE FUSE
WITH THE SAME TYPE 6.3A FAST
BLOW FUSE (F 6.3A H 250V)
CAUTION: TO REDUCE THE
RISK OF ELECTRIC SHOCK,
DO NOT REMOVE COVER.
NO USER SERVICEABLE PARTS
INSIDE. REFER SERVICING
TO QUALIFIED PERSONNEL.
AC Input
115/230 V
50/60 Hz
400 Watts
~

4
optimized to get the best sound from piezo pickups. The XLR input is a
low impedance balanced input with sufficient gain to allow
microphones to be plugged into it. There is a switchable 10 dB pad to
attenuate the mic level when it is too “hot.” Phantom power is available
through the connector for powering a mic or outboard preamp and can
be activated using the push button switch located next to the
connector. To avoid an audible “pop”, set the input level control all the
way off when switching on the phantom power. An LED indicates
when phantom power is on. In the two channel versions, each channel
is identical and can be blended to mix two instruments, 2 microphones
or a mic and an instrument thereby performing much like a small PA
system.
The preamp has the following controls in each channel: input level,
bass, mid, treble and effects level. In addition, there is a variable
frequency low cut filter and a phase reverse switch and a master level
control that affects both channels.
The input level controls the level of the signal at the input stage of the
preamp. The master volume controls the level of the signal at the
output of the preamp (at the input of the power amp). Set the master
control at “12 o’clock” and the input level at zero. The input level
should then be used to control the overall output of the unit. The two
controls are provided to allow independent control of “house” volume
and “stage” volume when the unit is used as a stage monitor with a
connection to a house PA. See the discussion under “Direct Out”
below.
The maximum volume at which the system will play is limited by the
capability of the speaker system. A 10-inch driver in a small cabinet
has a limitation in how loudly it will play. The 2x10 configuration of the
Ten2 will play louder but it still won’t play at
“rock” levels. If more volume is needed, use an extension cabinet
(Coda EX, Corus EX or Ten2 EX) or take a feed from the Direct Out
jack to a PAsystem or another amplifier.
Each tone control has a center detent at the flat position. Experiment
with settings to achieve the frequency balance that sounds best to
you. In general, small values of boost and cut are best. The amp is
designed with flat frequency response so only minor corrections
should be required to compensate for room effects or “peaky” pickups
in order to maintain the balanced response desired for acoustic
instrument amplification. To minimize electronic noise, avoid
operating all controls simultaneously at their maximum settings.
Controls
Level
Tone
5
The bass control is a shelving-type that affects frequencies below 250
Hz and with a maximum boost/cut of 15 dB. The mid control affects
frequencies between 300 Hz and 2000 Hz and has a maximum
boost/cut of 15 dB. The treble control is also a shelving-type that
affects frequencies above 1000 Hz with a maximum boost/cut of 15
dB.
The amps have a low cut filter and phase reverse switch in each
channel. The low cut filter is a variable frequency type that inserts a 12
dB per octave rolloff at frequencies between 30 and 400 Hz,
depending on the position of the control. Approximate frequency
settings are noted on the frequency control. Note that the first half of
the control’s rotation affects frequencies from 30 to 60 Hz, the last half
of the rotation affects frequencies between 70 and 400 Hz. This is
done so that there is plenty of control in the critical low frequency
range. The low cut filter is used to reduce the bass output in cases
where room location or instrument/pickup combination results in
“boomy” sound. Press the on/off switch to turn on the filter circuit. Start
with the frequency control fully counterclockwise and gradually turn it
clockwise until the desired effect is achieved. Experiment with the
position of the control to give you the sound you like best.
The phase reverse switch is used to reduce feedback and to control
phase interactions between the two channels. If you are using two
pickups or a mic and a pickup, you will find the phase reverse switch to
come in handy. Mic feedback can be reduced by reversing the phase
of the signal. Phase related interactions between a mic and a pickup
or two pickups can be cleared up by reversing the phase of one of the
channels. You should experiment with the phase reverse switch to see
if the effect is one that you like.
Acoustic Image preamps have output (“Send”) and input (“Return”)
capability in each channel to allow you to use effects boxes. The send
output is affected by the input volume and tone controls and can also
be used as a preamp output for driving other power amplifiers. The
Return input can be used to directly connect an external preamp to the
unit’s power amp. The effects level control in each channel controls
the volume of the returned (“wet”) signal relative to the original (“dry”)
signal. Because the effects loop is a parallel type, plugging something
into the send output does not interrupt the signal path. So, a tuner can
be plugged into the send output without affecting the signal going
through the amp. When the effects loops are not used, the level
controls should be set at zero.
The return input can also be used as an auxiliary input for connecting
other line level signals such as a CD player.
Low Cut Filter/Phase Reverse
Effects Loop

6
Direct Out
Mute Switch
If you are not
getting any sound out of the amp, check to make sure that the
mute switch is off.
Stereo Operation
Note that channel
2 will not be heard through the speaker system unless the Ch 2
switch is in the depressed or on position. If you are not hearing
channel 2 in the output, check to be sure that the switch is on.
An XLR jack is provided for a Direct Out connection that allows the
system’s output to be fed to mixing boards of house PA systems or
recording studios. As a result, the instrument amplified by the unit can
be recorded or further amplified by the house PA system. In the two
channel amps and combos, the Direct Out signal is the combined
output of the two channels. A switch is provided to allow you to select
whether the output from the Direct Out jack is affected by the tone
controls (post EQ) or not (pre EQ).
With the switch in either the pre or post EQ position, the input level
control affects the level of the Direct Out signal, the master level does
not. This allows independent adjustment of the “stage” volume (the
volume coming from the combo amp) and the “house” volume (the
volume in the house PA system) when the unit is used as a stage
monitor. Once the level has been set for the house, if more volume is
needed on stage, the master level can be increased. This will increase
the stage volume but not the volume in the house PA.
A ground lift switch is available to “lift” the ground from the output of the
direct out--reducing noise should a ground loop create hum when the
unit is connected to a mixing board.
A switch is provided to allow you to mute the output of the amplifier
without having to turn the amp off. This will allow you to tune your
instrument on stage without being heard. The amp output and direct
out signals are both muted by the switch. The mute switch has a red
button on it to remind you that it is an important switch.
The two-channel preamp can be operated in stereo mode. When it is
in the “on” position, the switch labeled “Ch 2” connects the channel to
the internal power amp and speaker. When it is in the “off” position, it is
disconnected from the internal amp but is accessible from the channel
2 send output. By connecting the send output to a satellite power
amplifier, and putting the switch in the off position, the preamp
operates in stereo mode. Note that channel 2 remains in the direct out
signal even when the switch is in the off position. This is done since
stereo operation is typically a “stage” mode but not a “house” mode
(house systems are typically not stereo). The Ch 2 switch has a red
button to remind you that is is an important switch.
Signal Flow Diagram
Two channel version shown, the one channel
version has channel 2 removed from the diagram
One Channel Control Panel
Input
Level Bass Mid Treble Level
Channel 1
Freq
Direct Out
Master
Power
Level
Effects
Phantom
Hall
Room
Plate
Delay Ambient
Chorus
Flange
Off On
Off On
Low Cut
Send
Return
Post EQ Mute
Ground
lift
Off On
Effects
Loop
30 400
60
Phase Inv
Off On Mic
Atten
PRE EQ OUT
BUFFER
INPUT BUFFERS
INPUT BUFFERS
OFF ON
-10 dB MIC
ATTEN
ONOFF
-10 dB MIC
ATTEN
FILTER
OFF
CUT
FILTER
OFF
CUT
180
PHASE INV
OFF
180
PHASE INV
OFF
7

8
BYP
FX
FX
BYP
CH 2
SWITCHFX
CH 1
SWITCHFX
CH 2
RETURNFX RTN
LEVEL
FX HEADPHONE
OUTPUT
H/P
AMP
CH 1
RETURNFX
RTN
LEVEL
FX
Two Channel Control Panel
Input
Level Bass Mid Treble Level
Input
Level Bass Mid Treble Level
Channel 1
Channel 2 Send
Return
Freq
Direct Out
Master
Power
Level
Effects
Phantom
Phantom
Hall
Room
Plate
Delay Ambient
Chorus
Flange
Off On
Off On
Off On
Low Cut
Send
Return
Ch 1
Ch 2
Post EQ Mute
Ch 2 Ground
lift
Off On
30
60
400
Effects
Loop
Effects
Loop
30 400
60
Phase Inv
Freq
Low Cut
Phase Inv
Off On
Off On
Mic
Atten
Mic
Atten
9
Effects
Headphone Output
There is a short delay between removal of the plug and the amp
coming back on, so expect a pause before you will hear anything
from the amp after the headphone is removed.
Limiter Switch
Our high-quality effects units offer 6 program selections: 3 reverb
programs (Hall, Room and Plate), a delay, an ambient chorus and a
flanger. There are switches to select which of the two channels are
processed by the effects unit. Either channel can be connected to the
effects unit. If both switches are engaged, the selected program
appears in both channels. In the one channel preamp, only one switch
is present. A level control affects the level of the effects signal that is
mixed with the “dry” signal to control the overall effect of the selected
program. You should experiment with both the program selection and
the level control to find the sound that you prefer. When effects are not
used, the switches for both channels should be off and the level
control should be turned fully counterclockwise. Note that the flange
effect is noisy, it is normal the hear the modulation of the flanger when
no signal is present.
There is headphone output on the rear panel of the amp head. You can
plug a standard 1/4 inch stereo plug into this output to connect a
headphone for private listening. If your headphone has a 1/8th inch
plug, you can buy an adapter to allow you to use the 1/4 inch output
jack.
When you plug into the jack, the amp is muted. Sound will only be
heard through the headphones. The headphone is connected to the
output of the preamp so all of the controls on the preamp, including
effects, will affect the signal heard through the headphone. When the
headphone plug is removed from the jack, the amp will come back on.
Anytime anything is
plugged into the headphone output jack, the amp will be muted so
make sure that nothing is plugged into the jack when you want to use
the amp normally.
Under extreme playing conditions such as high volume or when
driving a low impedance speaker load, the amplifier may be pushed
beyond its limits. When that happens, you will hear high distortion and
you may even cause the overcurrent protection circuit to operate
resulting in an interruption of sound. The power amp is protected
against short circuits in its output. When the amp tries to deliver too
much output current, the overcurrent circuit will operate to prevent
damage. The result is that the power amp is turned off for a second or
two to keep it from delivering too much current. The limiter switch,
located on the rear panel of the amp head, is provided to allow the amp

10
to operate under these conditions with lower distortion or without
having the overcurrent circuit kick in. The limiter reduces the peak
signal that is driving the power amp, thereby reducing its peak output
with the result of lower distortion. If you find yourself having to play in
extreme conditions that cause the amp or combo to have too much
distortion or even signal interruption, engage the limiter and see if that
helps the situation.
Speakers are connected via Neutrik Speakon connectors (“twist lock”
type) located on the rear panel. These connectors are used because
of their low contact resistance and non-shorting operation. The output
of each Speakon connector is wired to pole “1”. Make sure the cables
you use to connect a speaker (and the speakers themselves) are
similarly wired.
The power amplifier is capable of driving speaker loads as low as 2
ohms. Use a high quality speaker system in order to get the maximum
performance from the amp. The Acoustic Image Coda EX, Corus EX
or Ten2 EX are excellent choices. As mentioned above, the power
amp is short circuit protected. If a short is connected to a speaker jack,
the output signal will be interrupted until the short is removed. Note
that when using a 1/4 inch type speaker plug, there is a momentary
short that occurs when the plug is put into the jack. That short can
cause a problem for the amp.
There may be times when you want to operate the amp without a
speaker connected to it. For example, you may want to record using
the Direct Out and don’t want the output of the amp to be heard
through a speaker. In that case, set the master level to zero. By setting
the master level to zero, the signal to the power amp is turned off and it
is not driven without a speaker load which can damage the amp.
Power Amp
Connecting a Speaker
Operation Without a Speaker Connected
Be
sure to set the master level to zero when a speaker load is not
connected to the amp. Operating the amp with no load and the
master level turned up can damage the amp.
To be on the safe side, you should
shut off the power to the amp before connecting or
disconnecting speakers from the unit.
11
Operation--Speaker Cabinets
Docking System
Speaker Placement (Combos or Extension Cabs)
Tilt Mechanism
The amp head component of our combo amps can be removed and
used as a stand-alone amplifier. To remove the head unit, first
disconnect the speaker “pigtail” that connects the speaker cabinet to
the amp, then unscrew the docking screws on the rear panel until they
are loose. Grip the cabinet as shown and use the tips of your fingers to
push the head unit out. The fit is quite snug so some force will be
needed.
Once you have removed the head, you will notice the rubber feet
stored in a compartment on the bottom. Remove the feet and screw
them into the four positions on the bottom of the head. When you want
to put the head back into the cabinet, you will have to remove the feet
and put them back into the storage compartment.
To reinsert the head unit, grip the cabinet as shown and push it in with
your thumbs. Again, the fit is snug so some force will be needed. Once
the head unit is in place, tighten the docking screws to pull the head
tight to the docking plate. Reconnect the speaker cable and the unit is
ready to go.
The omnidirectional low frequency output of our speaker cabinets
makes speaker placement relatively noncritical. You will easily be
heard all over the bandstand no matter where one or more are
located. However, best results are obtained when the cabinet is
placed on the floor. Putting the unit on a shelf or stand will reduce
bass frequencies. There may be circumstances where this is
desirable. Feel free to experiment to find the sound that is best for you.
In some settings, such as a hollow stage or small, “boomy” room, your
amp or enclosure will produce too much bass. One way to cut
unwanted bass output is to use the built in tilt back feature to lift the
front of the cabinet, reducing the coupling to the floor. To do this, pull
the stand into its forward position and set the combo in place on the
floor. The stand is spring loaded so when you pick up the unit, the
stand will spring back into its storage position. You may want to use
Removal Insertion

12
the tilt stand at all times in order to aim the high frequency output of the
speaker toward your ear so that you can better hear the amp.
An extension speaker (ideally, one of our cabinets which is matched to
the specific combo unit) can be connected to the amp to increase its
output level using the jack provided on your amp’s rear panel.
Speakers are connected via Neutrik Speakon connectors (“twist lock”
type). These connectors are used because of their low contact
resistance and non-shorting operation. The output of each Speakon
connector is wired to pole “1”. Make sure the cables (and cabinets)
you use to connect an external speaker are similarly wired.
The combo amp has two outputs on the rear panel but one of them is
used to connect to the internal speaker via the short jumper cable. So,
one output is available for connecting an extension cabinet.
As mentioned earlier, the power amplifier in our combo amps is
capable of driving speaker loads as low as 2 ohms. Use a high quality
speaker system in order to get the maximum performance from the
amp. The amp has a short circuit protection circuit that interrupts the
signal if a short is connected to the speaker output. If you are getting
no sound when an extension cabinet is attached, check to see if the
extension has a short in it.
A switch that controls the output level of the midrange driver is
mounted on the docking panel of the Coda and Corus combo units.
We call it the Presence switch. The switch allows the Coda to sound
brighter and more forward, or in the case of the Corus amp, it can be
used to make it sound less forward. Play through the combo and try
the switch in each position to see which position sounds best to you.
You will hear the relative level of the mid and high frequencies change
as you flip the switch. You may find that the more forward sound is
helpful when you are playing in noisy environments.
So, what’s the difference between the Corus and the Coda? The
preamp and power amp of the Corus are the same as those used in
the Coda. The Corus uses a different woofer. It is more efficient and
has slightly less bass response. When coupled with the other speaker
in the two-way system and after the crossover is adjusted for the
higher efficiency of the woofer, the result is still a flat response like the
Coda and but the low frequency 3 dB point is higher (60 Hz versus 40
Hz) and the overall efficiency of the system is higher (94 dB versus 90
dB). Thus the Corus is more optimized for non bass instruments than
the other combos. In particular, guitar, keyboard and violin players will
like the sound of the Corus. The higher efficiency gives it a more
“forward” sound that these instrumentalists prefer. The slightly higher
Connecting An Extension Speaker
Presence Switch (Coda and Corus)
Description of the Corus Combo
low frequency cut off is not noticeable with guitar and other
instruments.
The Corus EX has the same speaker components and the Corus
combo and the perfect match to the combo when additional volume is
needed. The Corus combo and Corus EX have a gray front panel and
a gray front grill so they look a little different and can be easily
distinguished from the other combos.
The tweeter level control is located on the rear panel of the speaker
cabinet(see picture of the rear panel below). It is a three position
switch with a selection of zero attenuation, 6 dB attenuation or off. The
tweeter operates from 3000 Hz and up so it’s effect on the sound will
be audible. Under most circumstances, it should be operated with zero
attenuation. Experiment with the control and pick the level of
attenuation that sounds best to you.
The Room Coupling Control is also located on the rear panel of the
Ten2 speaker cabinet. It is used to control the low frequency output of
the downfiring woofer. It is useful in controlling “boominess” in difficult
acoustic settings. It is a three position switch with settings of 100%,
75% and 50%. At the 100% setting, the downfiring woofer is operating
at full output. At the 75% setting, it’s output is reduced slightly. Use this
setting when there is only moderate boominess in the room. At the
50% setting, the output is reduced even more. Use this setting for the
most difficult situations. Experiment with the control so you can get a
good idea of its effect on the sound.
The Ten2 EX is the speaker cabinet portion of the Ten2 combo. It is
about 3 inches shorter and about 7 pounds lighter than the Ten2
because the docking bay for the amplifier is not attached and the amp
head is not provided. It has the same speakers and the same
performance as the Ten2. It is the ideal extension cabinet for the Ten2
but it can also be used effectively with any of our other 1x10 combo
amps. In fact, the other combos can be stacked on top of the Ten2 EX
to create a 3x10 system.
Tweeter Level Control (Ten2, Ten2 EX)
Room Coupling Control
Description of the Ten2 EX
75%
50%
R
o
o
m
C
o
u
p
l
i
n
g
C
o
n
t
r
o
l
100%
-6 dB
0 dB
T
w
e
e
t
e
r
A
t
t
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a
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i
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Off
Ten2 and Ten2 EX Rear Panel
13

System (all models)
Amp Head
Frequency Response 30 Hz-18 kHz (40-14 kHz ±3 dB)
50 Hz- kHz (60-1 kHz ) Corus
Max SPL >112 dB at 1 meter,
(Corus), >118 dB/m (Ten2)
AC Power 100-115V/50/60 Hz or 220-240V/50 Hz,
switchable,
Size 12”Hx15”Wx13”D (Coda, Corus, EX)
Weight 22 lbs (Coda, Corus, 19 lbs (EX)
32 lbs (Ten2), 25 lbs (EX)
4 lbs (Clarus)
Frequency Response 20 Hz - 20 kHz (
Mic Input 600 ohm balanced, XLR connector,
switchable 10 dB pad
Phantom Power 48 volts, on/off switch w/LED indicator
Instrument Input 1 M impedance, 1/4 inch jack
Direct Out +4 dB, balanced, XLR connector, ground
lift, pre/post EQ selector
Effects Loop Parallel type with return level control
Bass Control Shelving type, ±15 dB at 60 Hz
Mid Control ±15 dB at 650 Hz
Treble Control Shelving type, ±15 dB at 10 kHz
Low Cut Filter -12 dB/octave sweepable from 30 to 400
Hz
Phase Reverse Switchable 180 degree phase reverse
Type Digital with 6 presets and level control
Program Presets 3 reverb (hall, room, plate), delay,
ambient chorus, flange
Topology Class D (PWM)
Switching Frequency 500 kHz
Output Power 8 300W rms continuous, 350W rms music,
500W peak transient
External Speaker Output Neutrik Speakon type (pole 1), 2 min
load including internal speakers, if
connected
18 4 ±3 dB
>115 dB at 1 meter
17”Hx15”Wx13”D (Ten2), 14”H (EX)
10”x8”x3.5” (Clarus)
±0.5 dB)
Output Power 4 500W rms continuous, 650W rms music,
1000W peak transient
Preamp (Mic and Instrument Inputs through combo jack)
Effects
Power Amp
W
W
W
W
14
Specifications
Speaker System (Coda, Corus)
Speaker System (Ten2)
Shoulder Strap
Woofer 10 inch, downfiring
Midrange 5 inch, forward firing with 2 position level
control switch
Crossover Passive, alignment corrected
Impedance 8
Power rating 250W
Woofer Dual 10 inch, one downfiring with level
control, one forward firing
Tweeter 2.5 inch forward firing with attenuation
control
Crossover Passive, alignment corrected
Impedance 4
Power rating 500W
Fitted slip cover with cord storage
pocket and shoulder strap (combo
amps)
Gig bag with shoulder strap, Speakon
to 1/4 inch adapter (amp heads)
Padded gig bag with shoulder strap
made by Mooradian, kit to convert
cabinet with head removed to an
extension cab (adapter, filler panel,
padded case for head)
To use the shoulder strap to transport a combo amp, feed the strap
through the handle opening on the speaker cabinet (both sides) and
clip the end to the D-ring attached to the strap. The picture below
illustrates how to attach the strap. The strap can be used either with
the slip cover in place or not in place.
W
W
Supplied Accessories
Available Accessories
15

Care
Warranty and Repair
Acoustic Image combos and cabinets are made from injection molded
polymer materials. A little care will keep yours looking new for years to
come. Use a clean, dry cloth to clean the cabinet and metal parts of
the amplifier.
We stand behind our products with a full warranty of five years from
the date of purchase. Speaker components are warranted for 180
days. Should a problem arise, please call us before returning your
amplifier or enclosure. Naturally, our warranty does not cover
products that have been damaged through misuse. Be sure to check
our web site regularly, we have an FAQ section and we post helpful
information for getting the most out of yourAcoustic Image product.
Warranty Information
Serial Number _______________
Acoustic Image Phone: 919-785-1280
5820 Triangle Drive Fax: 919-785-1281
Raleigh, NC 27617
www.acousticimg.com
16
© 2011 Acoustic Image LLC
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2
This manual suits for next models
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