CH M10 User manual

M10 Two-Channel Reference
Power Amplier
User Manual

Dear Valued Customer,
We are honored that you chose the M10 Two-Channel Reference
Power Amplier. Our team has made every effort in the design and
manufacture of this top quality versatile and future-proof product and
is proud to present it to you. We hope your M10 amplier will bring you
uncountable hours of emotional connection with your music collection.
But before you embark on your musical journey, we kindly request your
attention to the information contained in this manual. The M10, as you
will discover in the following pages, is a Swiss precision product designed
for ultimate performance and exibility. However, delivering that ground
breaking sonic and musical excellence requires your unit to be setup and
operated correctly. That is what this manual is all about. If you have any
questions or require assistance, please don’t hesitate to contact your
authorized dealer.
Once properly installed and congured, we are condent that you will
enjoy your M10 power amplier for many years.
The Concert has just begun...
Cossy F.
Heeb T.
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M10 User Manual 3
Table of contents
1 Introduction
1.1 Output modes 4
1.2 Global audio options 4
1.3 Input-specic options 4
1.4 More user congurable options 5
1.5 The purpose of this manual 5
2 Setting up your M10
2.1 Safety notice 6
2.2 Unpacking 6
2.3 Package contents 7
2.4 Placing your amplier, connecting the two chassis together and installing the spikes 7
2.5 Stacking the M10 (or not) 9
2.6 Connections 10
2.6.1 USB port 12
2.6.2 Ethernet port 12
2.6.3 Local area network considerations 12
2.6.4 Ground lift 12
2.6.5 Inputs 12
2.6.6 Outputs 13
2.6.7 AC Power 13
3 How to congure and operate your M10 14
3.1 Front panel controls 14
3.2 Normal mode 15
3.3 Shortcuts 16
3.4 Menu mode 17
3.5 Menu options 17
3.5.1 Audio settings menu 19
3.5.2 Input-specic settings menu 20
3.5.3 Display settings menu 20
3.5.4 Shortcut menu 21
3.5.5 Network menu 21
3.5.6 Factory settings menu 22
4 Firmware update
4.1 Preparing the USB stick 23
4.2 Updating the unit’s rmware 23
4.3 Emergency rmware update procedure 24
5 Troubleshooting 25
6 Specications 26

1 Introduction
CH products are designed and manufactured in Switzerland by CH Precision Sàrl. We use fully discrete,
fully balanced, fully complementary, ultra-short signal path circuits – but we combine them with sophisticated
software control, monitoring and protection to ensure the highest possible levels of performance, operational
consistency and versatility.
As a result, your M10 offers a number of operational features that are unique and probably unfamiliar.
For that reason it is essential that you fully understand every aspect of the M10’s operation if you are to
enjoy its maximum possible performance.
1.1 Output modes
Stereo mode: Standard stereo conguration, the left channel input is fed to the left amplication channel and
the right channel input is fed to the right amplication channel. A single M10 drives a stereo setup.
Passive bi-amp mode: Both amplication channels are fed from a single input, with independent gain and
local / global feedback ratio; ideal for loudspeakers equipped with two or more independent binding posts,
allowing maximum exibility. Two or more M10 are needed for a stereo setup.
Active bi-amp mode: To be used with an external low-level cross-over between the preamplier and the M10
ampliers. The external crossover splits each channels of the original audio signal into different frequency
sub-bands to be amplied independently to control the different drivers composing each loudspeaker.
This mode allows each M10 to provide two identical amplication channels (like in stereo mode), but with
independent gain and feedback settings. Two or more M10, each equipped with two input boards, are needed
for a stereo setup.
High-current mono mode: A single amplication channel is driven but utilizing the entire power supply,
allowing 1’600 WRMS into a 1Ω load; ideal for low-impedance or reactive loudspeaker loads. Two or more
M10 are needed for a stereo setup.
Bridged mono mode: Bridged operation combining both channels to deliver 1’100 W WRMS into an 8Ω load;
ideal for higher-impedance loudspeaker loads. Two or more M10s are needed for a stereo set up.
1.2 Global audio options
Input type selection (balanced XLR with ultra-short signal path, single-ended RCA or BNC)
Global feedback ratio (0% to 100% in 1% steps)
Amplier gain adjustment, 6dB range in 0.5dB steps
1.3 Input-specic options
Status: active, hidden or bypass
Impedance: high (94kΩ/47kΩ) or low (600Ω/300Ω)
Low pass lter to add noise immunity from source
Absolute phase polarity
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1.4 More user congurable options
Display: color, content and brightness
Dene shortcut functions
Network conguration
Firmware version and update
1.5 The purpose of this manual
This manual will lead you through each step of the installation and set up procedure, in a clear and logical
sequence. Although the operation and options might seem complex, they will quickly become second nature.
But because of the sheer range of options available it is easy to overlook something unless you approach set up
and conguration in a systematic way. If you take the time to follow the manual, it will ensure that you become
completely familiar with the M10’s many options and that your amplier delivers the best possible performance.

2 Setting up your M10
2.1 Safety notice
Like any piece of sensitive audio electronics, there are certain precautions that you should take in handling
and installing your CH Precision M10 in order to protect yourself, your new equipment and your system.
Always handle with care. The M10 amplier components are extremely heavy, so have someone to help
you when unpacking, re-packing or moving them around. It is neither safe nor sensible to attempt to pack,
unpack or move them on your own. You risk seriously damaging both your ampliers and your health!
Install both chassis of your M10 amplier on strong, stable supports capable of holding their considerable
weight. It is best to clear/prepare the supporting surfaces in advance.
Do not install your M10 amplier near water.
Do not expose the units to any kind of liquid.
Do not install them under direct sunlight or near any heat source, such as a radiator or other apparatus
generating heat.
Do not install them in a conned space and make sure there is sufcient ventilation and airow around and
beneath each unit.
Do not operate them under high ambient temperature (>40°C) or in extremely high humidity conditions.
Only use options and accessories specied or recommended by CH Precision.
Do not open the units or try to service them yourself. Always refer to a qualied technician for service,
maintenance or upgrades. Failure to do so will void the unit’s warranty.
2.2 Unpacking
The M10’s cartons are large and contain both the components and all of their accessories. You will need
a large, preferably carpeted area in which to unpack them. Please also ensure that the rack, platform or
support space on which the M10 will be placed has been cleared and cleaned before you start. At this point
it is also worth ensuring that the connectors on any interconnect cables are cleaned and that the power to
your system is turned off. Each Carton consists of an inner box and outer sleeve. It is easiest to empty one
box at a time, before reassembling it to save space.
Once you open the inner box, remove the top layer of white foam packaging. Inside you will see the
component chassis and various accessories.
With a helper, carefully lift the M10 component out of the box and place it to one side. Then carefully remove the
plastic bag in which it is sealed. Alternatively, open the carton, fold the aps out of the way and gently turn the
whole box over. You can then lift the cardboard carton off of the internal packing, remove the foam base (that is
now on top) and gently turn the unit onto its feet. This saves lifting the heavy chassis off of the ground.
Remove the small, brown Accessory Pack and place it with its unit. Also remove the power cord and suction
cup (if present) and the four levelling/grounding spikes.
We recommend storing the Accessory Packs in a readily accessible place, so don’t put them back in the
cartons with the plastic bags when resealing them.
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M10 User Manual 7
2.3 Package contents
Your M10 should arrive in two substantial cartons. Once unpacked these cartons and packaging materials
should be stored safely in case you ever need to transport your units. When moving or transporting the M10
units, this should always be done in the original packaging.
The audio chassis carton should contain:
The M10 amplier
Four composite titanium/polymer spikes
A suction cup (used to remove the four top covers)
An accessory box containing:
–a spike adjustment screwdriver
–a Torx T-10 screwdriver
–four support discs
–four smaller, dimpled stacking caps
–a USB stick containing the latest CH Precision rmware
The power supply chassis carton should contain:
The M10 power supply with four captive umbilical cables
Two 20A power cords
Four composite titanium/polymer spikes
An accessory box containing:
–four support discs
–four smaller, dimpled stacking caps
In case of damage to either chassis, or missing components, please contact your authorized dealer immediately.
If your M10 units are still very cold from transport, please let them warm to room temperature in order to avoid
condensation developing inside them.
2.4 Placing your amplier, connecting the two chassis together and installing
the spikes
Before positioning your M10 units, it is worth taking the time to make a few preliminary decisions.
Decide which inputs you will use. Familiarizing yourself with (and making a note of) their position on the rear
of the audio chassis will be extremely useful when you come to actually make connections and allocate /
congure those inputs.
Decide whether you will use the CH Precision supplied levelling / grounding spikes. If an alternative system
is to be used, please note that the lower part of each foot that is held by three screws can be removed to
provide an easier access to the M10×1.5 central thread where a third-party system can be attached. Please
note that the CH Precision casework is designed to support weight and ground energy in the corners only.
If you choose to use third party supports they should be positioned in the same location as the unit’s original
feet and we do not recommend stacking components except using the supplied spikes and caps.
If you do plan to use the CH spikes, use the blue suction cup to lift the four magnetic circular covers in the top
plate of each unit. Gently insert the titanium composite spikes into each exposed shaft and use the short red
screwdriver to turn them enough to engage the threads at the bottom of each spike. Each internal thread
is coated with a thin layer of grease during assembly to prevent galling between it and the titanium spike.

M10 User Manual 8
Do not screw the spikes in too far at this point or they will protrude from the feet and potentially damage
the supporting surface. Do not replace the top-caps yet.
Check that the voltage selector rotary switch on the M10 power supply unit is set to the correct local voltage
and that the power switch is off (the 0 side depressed).
Now you are ready to place the units. Each chassis is heavy and the feet are tted with elastomer rings to
protect the supporting surface, which makes it hard to slide the units. Having a partner or two to lift and help
place each chassis should be considered essential.
Place the power supply rst, carefully planning the path to be taken by the four umbilicals before
positioning the unit.
Gently place the umbilicals into position to be connected to the audio chassis, noting which is which.
Do not cross connect the umbilicals.
Move the audio unit as close as possible to the rack/support so that you can connect the umbilicals before
moving it back into position. Connect the four umbilicals to their corresponding sockets (they are color coded
with rings on the sockets and heatshrink on the umbilicals). The plugs on the umbilicals will only insert in one
position / orientation, so turn the connector in the socket until you feel it engage and then gently push
it home to lock it in place.
DO NOT force the umbilical connectors into the sockets.
This will risk damaging the connecting pins and disable your M10.
If you feel resistance when you insert the connector, disconnect the umbilical and start again.
You will be able to feel when the umbilical is in the correct position as it will produce a locking sound.
The M10 is supplied with a set of support discs. These have a groove machined in the upper face that ts over
the elastomer ring in the underside of each foot. Carefully lift each corner of the chassis in turn and position
the chosen disc beneath each foot. The groove that interfaces with the elastomer ring will ensure that the
footer disc stays in place if you slide the unit.
As well as making the units easier to position, the support discs can also offer a superior interface between
the grounding spikes and the supporting surface. The spikes are designed to drain internally generated energy
away from sensitive circuitry and into a dispersive support structure, but if the supporting surface is extremely
hard or forms an impedance mismatch with the spike tips, the material and footprint of the support discs can
function as a lossy mechanical buffer, easing the passage of mechanical energy out of the unit. As a rule, the
support discs work well with very hard surfaces, but results will vary with system and supporting surface. Once
set up and warmed up, compare the sound of the unit(s) with and without the discs in place.
Use the red screwdriver to wind down each of the four spikes until they touch the surface (or disc)
underneath. You will feel a slight resistance due to the chassis’ weight. Then turn each spike by the same
amount, for instance one more full turn. This should ensure that the load is evenly applied on all four spikes.
It is worth using a spirit level to ensure that the M10 units are perfectly level. If they are not at this point
of the setup, adjust the spikes with the screwdriver. Once this is done, simply check that all four spikes show
the same resistance to turning. This means that the spikes are rigidly coupled to the supporting discs and
equally loaded.
Replace the top caps. Their magnetic coupling will hold them in place.

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2.5 Stacking the M10 (or not)
Also included in the accessory packs is a set of small, dimpled stacking caps for each unit. These polymer
inserts allow owners to stack the M10 units on top of each other. However, this will inevitably compromise
performance and should only be done when space is at an absolute premium.
The optimum support for any CH unit is to mechanically ground it to a stable, dispersive structure, either
using the supplied spikes or an after-market solution. But if lack of space absolutely mandates the stacking
of CH components, then using the supplied spikes and stacking caps will provide the best possible solution.
The stacking caps simply screw into the top of the spike wells, taking the place of the cosmetic caps.
When a second unit is stood on top of them, its spikes can be wound down into the wells in the caps,
providing a stable, safe and easily managed stacking option that improves mechanical termination and
satises aesthetic and practical considerations.
You may choose to use the support discs below the bottom unit if the sound is preferred.
If stacking M10 units, you should place the audio chassis on top of the power supply.
Make sure that you retain the cosmetic top caps from the lower unit(s) and store them safely as you may
well require them in the future if (or rather, when) your system or circumstances change.
M10
amplier
unit
M10 power
supply unit
magnetic
cosmetic
caps
stacking
caps
support
discs

2.6 Connections
With the two (or four) M10 units placed and levelled, you are now ready to connect your signal cables.
The rear panel layout is shown below:
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1. Right channel negative loudspeaker terminal #2
(customized Argento Audio connector)
2. Right channel positive (or bridged mono positive)
loudspeaker terminal #2 (customized Argento Audio
connector)
3. Right channel negative loudspeaker terminal #1
(customized Argento Audio connector)
4. Right channel positive (or bridged mono positive)
loudspeaker terminal #1 (customized Argento Audio
connector)
5. USB port for software upgrades [CONTROL board]
6. Ethernet port for network remote control
[CONTROL board]
7. Balanced XLR analog inputs (R & L)
8. Single-ended RCA analog inputs (R & L)
9. Single-ended BNC analog inputs (R & L)
10. Balanced XLR analogue outputs (R & L) for
amplier daisy chain connection
11. Earth socket. Internally connected to digital
ground and chassis
12. Ground lift: switch on to connect signal ground
(analog GND) to earth (digital GND)
13. Signal ground (analog GND) socket
14. Left channel positive (or bridged mono negative)
loudspeaker terminal #1 (customized Argento Audio
connector)
15. Left channel negative loudspeaker terminal #1
(customized Argento Audio connector)
16. Left channel positive (or bridged mono negative)
loudspeaker terminal #2 (customized Argento Audio
connector)
17. Left channel negative loudspeaker terminal #2
(customized Argento Audio connector)
18. Analog power supply socket, to be connected
to corresponding cable from power supply unit
19. 2nd high voltage rail socket, to be connected
to corresponding cable from power supply unit
20. 1st high voltage rail socket, to be connected
to corresponding cable from power supply unit
21. Control (digital) power supply socket, to be
connected to corresponding cable from power
supply unit
2 154 171 143166
7
9
11 13
810 125
1821
1920
M10 audio unit rear panel connections

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1. Control (digital) power supply umbilical cable,
to be connected to the corresponding socket in
the audio unit
2. Analog power supply umbilical cable, to be
connected to the corresponding socket in the
audio unit
3. Left 20A IEC power cord receptacle.
Both left and right need to be connected
4. Left high power section fuse (T10A for 230V
mains, T20A for 100V and 115V mains)
5. Low power section fuse (T1.6A for 230V mains,
T3.15A for 100V and 115V mains)
6. 2nd high voltage rail umbilical cable, to be
connected to the corresponding socket in the
audio unit
7. Earth socket. Internally connected to digital
ground and chassis
8. Mains voltage selector. Make sure it matches
your country’s power grid voltage
9. Mains power On/Off switch
10. Right 20A IEC power cord receptacle.
Both left and right need to be connected
11. Right high power section fuse (T10A for 230V
mains, T20A for 100V and 115V mains)
12. Standby section fuse (T250mA for 230V mains,
T500mA for 100V and 115V mains)
13. 1st high voltage rail umbilical cable, to be
connected to the corresponding socket in the
audio unit
You will note that as well as the array of conventional inputs and outputs, there are a number of other sockets
available which are used for control and update functions.
310 7 411 8512 9 613
21
M10 power supply unit rear panel connections

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2.6.1 USB port
The USB port is used to upgrade the M10 rmware. Do not use it for any other purposes. For more
information please refer to the rmware update instructions in the dedicated chapter of this manual.
2.6.2 Ethernet port
The Ethernet port is used for connecting the M10 to a local network router that will allow control of the M10,
its functions and conguration through the CH Control App, loaded on an Android device. This allows the user
to adjust critical settings (such as channel gain and global feedback ratio) from the listening position and can be
enormously helpful when it comes to system set up and tuning.
2.6.3 Local area network considerations
We strongly recommend that you construct a dedicated local network for both music streaming and system
control functions. It can be operated from locally located network switches, galvanically isolated from your main
household network using affordable and readily available optical converters. This will improve the responsiveness
of your setup, and keep as much high frequency noise out of your precious audio setup as possible.
2.6.4 Ground lift
The grounding switch allows owners to combine or separate the signal and chassis ground. In a complete CH
system, this allows you to congure a single point, star grounding arrangement for the signal grounds. It can
also prove useful in a situation where ground-loops generate hum.
2.6.5 Inputs
Make sure that the M10 is switched off and disconnected from the wall socket.
The modular input topology of the M10 means that each amplier chassis can carry a pair of input cards for
stereo or active bi-amplied operation, or a single left or right input card (always located in the left hand side
slot) for mono or passive bi-amp operation. Each input card offers a choice of balanced XLR or single-ended
RCA or BNC inputs. There is also a balanced XLR output to daisy chain ampliers in multi-amp systems.
For each input, you can select either high-Z (High Impedance, 94kΩ or 47kΩ ) or 600Ω/300Ω settings for
each input. The High-Z setting will draw no current from the preamplier, DAC or external crossover and will
deliver the greatest dynamic range and authority. The 600Ω (balanced) or 300Ω (single-ended) connections
will offer better rejection of induced noise and should be selected if noise oor becomes an audible problem.
Some source components (for instance some DAC with little ltering on their output stage) can produce
high frequency modulation noise that can damage the loudspeakers if a high bandwidth (DC to 500 kHz)
amplier such as the M10 is used. To overcome this issue, the bandwidth of the M10 can be limited to 120 kHz
thanks to a low pass lter that can be activated independently for any of its input. This low-pass lter is not
recommended with analog sources nor with CH Precision DACs.
Connect the source interconnects to the input you have chosen. If your M10 is congured in passive bi-amp,
bridged or mono mode, ensure that its unique input board is tted in the correct (left hand side) slot.
Stereo or active bi-amp congurations use both inputs boards.

M10 User Manual 13
2.6.6 Outputs
The M10 is equipped with two pairs of binding posts – blue and black on the left channel (right side as seen
from behind): red and black on the right channel (left side as seen from the back). In stereo or bi-amp modes,
red and blue are the positive connections, black the negative connections.
Consult the system topology diagrams and identify which layout your system corresponds to. Then carefully
connect your speaker cables as shown in the illustrations. Note that for bridged operation, you will connect
a single speaker cable to the red and blue terminals only. In this mode the red terminal is connected to the
positive terminal on the speaker, the blue to the negative.
Make sure to properly tighten your speaker cable terminals, both at the amplier end and at the speaker
end. This is especially true if you use heavy cables with spades terminals, whose weight tend to create a
lot of tension at the sensitive connection point. This will both ensure optimal power transmission and avoid
accidents if a speaker cable end disconnects from the binding post and touches a metallic surface that allows
a return path for the current ow. If the speaker cable features a bulky metallic part, even anodized, double
check that this part cannot touch the amplier’s back nor the speaker’s enclosure.
2.6.7 AC Power
With all the signal inputs and outputs connected, you can now connect the two 20A IEC power cords to the
input sockets on the M10 power supply and switch the units on. You should see the red bar in the CH logo in
the top-left corner of each front panel illuminate.
Your M10 is now in standby mode and ready to be turned on and congured.

M10 User Manual 14
3 How to congure and operate your M10
The M10 amplier is operated either from the unit’s front panel display and push buttons or from the CH
Control app. The initial set up should be done using the front panel buttons and the menus shown on the
display. Once congured for inclusion in the Control App, all parameters can be adjusted or re-set remotely.
3.1 Front panel controls
On the front panel of the M10 audio chassis you will nd the following controls and displays:
1. Standby LED
2. Five user control push buttons
3. Display area (high-denition display)
M10 audio chassis front panel elements
1
2
3
The standby LED lights up when the unit is in standby. It is normally turned off during operation.
The LED can also be programmed to remain on during operation.
The main display is a user customizable, multi-color high-denition panel with very wide viewing angle,
high contrast and high brightness, ensuring that it can be easily read from distance and at an angle.
The color and brightness of the display can be congured according to the user’s taste and other equipment.
It is set to dim to 30% brightness, once actual operations/adjustments have been completed, although this is
also user congurable.

M10 User Manual 15
The push buttons located on the front panel of the M10 allow users to operate the amplier as well as congure
its various selectable parameters.
Button position Button symbol Description
1st (top position) Standby (long push), Mute/Unmute (short push)
2nd Up
3rd OK
4th Down
5th Cancel
In use, your M10 has two operating modes: Normal mode and Menu mode.
Normal mode is used to operate the amplier. In this mode the M10 displays status
(such as power and/or temperature).
Menu mode is used to congure the unit. The M10 menus can be accessed through the Detailed Setup screen.
Users can also use Shortcuts to quickly access preselected Menu items. Shortcuts are user programmable
and most Menu mode items can be selected as Shortcuts.
3.2 Normal mode
In normal mode, the M10 can be congured to display its general status (operating mode [stereo/mono],
input [XLR/BNC/RCA)] feedback ratio, peak power, internal temperature, etc.).
It can also be set to display a peak power VU-meter, or a temperature gauge for each output channel. Once
powered-on, the M10 will show a Startup display which indicates the charging progress of the main power
supply. Once the supply is fully charged, the amplier will automatically enter Normal mode.
The following table shows the actions of the front panel push buttons in Normal mode.
Front face push buttons Unit State Unit Action
short push STANDBY Wakes up from STANDBY
Any other state Mutes/Unmutes outputs
long push STANDBY Wakes up from STANDBY
Any other state Goes to STANDBY
Any state Enters Shortcuts mode
Any state Enters Shortcuts mode
Any state Enters Shortcuts mode
Any state No effect
Front panel push buttons description
M10 push buttons actions in Normal mode

M10 User Manual 16
3.3 Shortcuts
The M10 amplier settings are accessible through menus accessed via the ve control buttons (or via the
CH Control app) and viewed on the display. The amplier also offers Shortcuts to the most frequently used
conguration menu items. Shortcuts are user selectable and fully programmable.
The user may choose any conguration parameter as a Shortcut.
There are up to six user programmable Shortcuts.
To learn how to program individual Shortcuts, please refer to the Shortcuts menu item in the next section.
There are no pre-programmed shortcuts dened within the Factory default settings.
To access user programmed shortcuts, press OK [ ].
1. Input selected
2. Input impedance termination
3. Indicates if the low-pass lter is engaged
(symbol) or not (nothing is displayed in this case).
4. Absolute phase polarity indication. If the symbol
is present, polarity is reversed
5. Mute indication. If the symbol is present,
the M10 output is muted
6. Instantaneous power indication. Gives a reading of
the peak power (in Watts) supplied to the loudspeaker
7. Average temperature of the two output channels
(in degree Celsius)
8. Global feedback applied to the channel 2 output
board (only displayed in bi-amplication mode)
9. Global feedback applied to the channel 1 output
board (in Bi-amplication modes) or to both output
boards (in Stereo, Monaural or Bridged modes)
10, Amplier mode (Stereo, Monaural, Active/Passive
Bi-amplication or Bridged
The general status display of the M10 looks like this:
7
1 2 34 5 6
Normal mode display elements
98
10

M10 User Manual 17
3.4 Menu mode
The Menu mode allows the conguration and set up of the M10 amplier. Menu mode is entered by pressing
the OK [ ] button until DETAILED SETUP appears on the main display. Then press UP [ ] to actually access
the available menus. If no shortcuts are congured, a simple press on the OK [ ] button will directly launch the
M10 setup menus. The entry screen looks as follow:
Navigation in the Menu mode is based on using the UP [ ] and DOWN [ ] buttons to highlight an item in the
menu. The OK [ ] button will select that item and then the UP [ ] /DOWN [ ] buttons can be used to adjust
the selected setting/value. Don’t forget to press the OK [ ] button once more to save the adjusted setting/
value. You can use the CANCEL [ ] to exit without saving.
M10 Front panel push buttons Unit Action
STANDBY [ ] Short Push Mutes/Unmutes the unit
STANDBY [ ] Long Push Goes to STANDBY
UP [ ] Moves to the next menu item upward
OK [ ] Enter the next menu level or Validate a choice (save settings)
DOWN [ ] Moves to the next menu item downward
CANCEL [ ] Returns to the previous menu level without saving
3.5 Menu options
If you study the menu tree laid out below, you can see the various options and where to nd them.
It may look confusing to start with, but it soon becomes clear and easy to navigate.
Below the menu tree is a list of the various sub-menu options and their signicance. These options are
the key to conguring your M10 to deliver the best performance, tailored user interface and coupling with
your system. It is worth studying the various options and their importance as they will directly affect your
enjoyment of your system.
M10 SETUP screen items
M10 push button actions in Menu mode

M10 User Manual 18
M10 amplier menu structure
BI-AMP
Normal mode
Shortcut mode SHORTCUT 1 SHORTCUT N EXITSHORTCUT 2 ENTER
M10 SETUP M10 SETUP >>
AUDIO
XLR / RCA / BNC >>
IMPEDANCE
XLR / RCA / BNC >>
FILTER
M10 SETUP >>
DISPLAY
DISPLAY >>
DISPLAY MODE
DISPLAY >>
FRONT LED
DISPLAY >>
BRIGHTNESS NORMAL
DISPLAY >>
COLOR
COLOR >>
EDIT CUSTOM
EDIT CUSTOM >>
GREEN
EDIT CUSTOM >>
RED
EDIT CUSTOM >>
BLUE
Menu mode
M10 SETUP >>
SHORTCUTS
SHORTCUTS >>
SHORTCUT 1
SHORTCUTS >>
SHORTCUT 2
SHORTCUTS >>
SHORTCUT 3
SHORTCUTS >>
SHORTCUT 4
SHORTCUTS >>
SHORTCUT 5
SHORTCUTS >>
SHORTCUT 6
M10 SETUP >>
FACTORY
FACTORY >>
FIRMWARE VERSION
FACTORY >>
UPDATE FIRMWARE
FACTORY >>
FACTORY RESET
FACTORY >>
INSTALLED OPTIONS
M10 SETUP >>
NETWORK
NETWORK >>
ROLE
NETWORK >>
STATUS
XLR / RCA / BNC >>
ALL PARAM RESET
NETWORK >>
POWER OFF COMMAND
NETWORK >>
ROOM NUMBER
DISPLAY >>
BRIGHTNESS DIMMED
FACTORY >>
SERIAL NUMBER
FACTORY >>
PROTECTION
NETWORK >>
IP SETTINGS
NETWORK >>
WAKE-ON-LAN
M10 SETUP >>
INPUTS
INPUTS >>
XLR / RCA / BNC
INPUTS >>
SELECTION
XLR / RCA / BNC >>
POLARITY
AUDIO >>
AMPLIFIER MODE
AUDIO >>
GLOBAL FEEDBACK
AUDIO >>
GAIN
NETWORK >>
NETWORK KNOWLEDGE
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3.5.1 Audio settings menu
Amplier mode
Allows users to select between the different operating modes (stereo, active/passive bi-amp, monaural or
bridged). With a single M10, you can only use the amplier in stereo mode. However, with a pair of M10s
there is a range of possible options, generally dictated by the matching speakers.
–If your speakers are bi-wirable then you have the option to run them bi-amped. The passive bi-amp
mode allows you use a single input but to adjust gain and feedback independently for each channel
of the amplier/section of the crossover.
–If your speakers use an active crossover between the pre-amp and M10 ampliers, you will need to use
both inputs while still being able to control the individual channel parameters.
–If your speakers are low impedance or present a reactive load, then monaural conguration will deliver
the best results.
–If your speakers are low sensitivity and/or high impedance, then bridged mode will be optimum.
Global feedback
Users can select the percentage global feedback (GFB) applied to the output stage. In the M10 the feedback
ratio can be adjusted from 0% global (100% local) to 100% global (0% local), in 1% increments.
Generally speaking, low levels of global feedback deliver the most musically expressive results, while
increasing GFB increases control and precision, especially at low frequencies. There is always a balance to be
struck between these qualities and in every system, that balance will occur at a different point.
Start with the GFB set to 0%. If you feel that the bass would benet from some extra grip, simply increase
the global feedback until you’re satised with the overall presentation. Do not add more global feedback than
strictly necessary, as ultimately it will decrease those qualities that make the midrange and treble sound so
uid and natural.
With a bi-amped or active setup, we recommend keeping the feedback setting for the mid/treble at 0%,
while applying subtle adjustments in %-level to the low frequencies. You can experiment with these settings
to arrive at the optimum value but note that: you may well reduce %GFB over time and that your preferred
value may actually vary with the musical program.
Gain
The M10’s overall gain is +24dB, with bridged mode adding an extra +6dB. The gain of each amplication
channel can be tuned by up to 6dB, in 0.5dB increments. This allows several things:
In a stereo setup, the nominal gain of the amplier can be modied to make the preamplier work in its
optimal range while keeping the same total system gain.
When used in conjunction with another amplier model (or a separate sub-bass system), the M10’s gain can
be adjusted, ensuring consistency across the system.
When using multiple M10s in a bi-amp conguration, setting independent gain for the different legs in the
loudspeaker crossover allows relative bass to midrange/treble level adjustment, which can be a vital aid to
speaker positioning and set-up.
M10 User Manual 19

M10 User Manual 20
3.5.2 Input-specic settings menu
Input selection
Each input board sports three connectors: A balanced XLR, a single-ended RCA and a single-ended BNC.
The XLR provides the shortest signal path, and is therefore the recommended choice if the preamplier
features a balanced XLR output. Single-ended inputs both pass through an additional conditioning circuit.
Impedance
Sets individual impedance termination per input.
High impedance (47kΩ for single-ended inputs, 94kΩ for balanced inputs) means this amplier’s input won’t
draw any current from the upstream device’s output (usually a preamplier), delivering the best possible
resolution and authority.
600Ω (300Ω for single-ended inputs) means a termination resistor is activated, increasing the noise immunity
of the interconnect while drawing a bit of current from the upstream device’s output. This eliminates induced
noise at the cost of dynamic range and precision. It should only be used if noise oor is an audible problem.
Low-pass lter
The default bandwidth of the M10 is DC to 500 kHz. As some delta-sigma DACs with little output ltering
can generate high frequency content that may damage loudspeaker tweeters when amplied by a wide
bandwidth system, we provide the facility to add a low pass lter with a cutoff frequency of 120 kHz in the
amplier’s signal path.
Absolute phase polarity
Allows you to reverse the absolute phase of the audio signal.
3.5.3 Display settings menu
Display mode
Allows the user to choose what information is displayed (status, power VU-meter or temperature gauge) and
whether the display remains on or switches off after a short time.
Front LED
Allows the user to turn the red power LED off when the units are active rather than in standby.
Display brightness and gamma
Allows you to set the brightness of the display in operating mode (10 – 100%), and to ne tune the high
brightness gamma curves to perfectly match the brightness and color or other displays.
Display brightness (dimmed)
Allows you to set the brightness of the display when dimmed between operations (10 – 30%), and to ne tune
the low brightness gamma curves to perfectly match the brightness and color or other displays.
Display color
Lets the user select display color from a choice of seven standard shades or a user dened RGB color.