Mutec REF 10 User manual

1
Manual
REF 10

3
Content
Precautions . . . . . . . . . . . . . . . . . . . . . . . 4
Warranty Regulations . . . . . . . . . . . . . . . . . 5
Introduction
General Description . . . . . . . . . . . . . . . . . . . 6
Features . . . . . . . . . . . . . . . . . . . . . . . . . 6
Matching MUTEC Products . . . . . . . . . . . . . . . 6
Accessories . . . . . . . . . . . . . . . . . . . . . . . 6
Product Registration for Warranty and Support . . . . . 7
Social Media . . . . . . . . . . . . . . . . . . . . . . . 7
Installation
Shipping Contents . . . . . . . . . . . . . . . . . . . . 8
Placing the Device . . . . . . . . . . . . . . . . . . . . 8
Interface Connections . . . . . . . . . . . . . . . . . . 9
Control Elements and Terminals
Front Panel. . . . . . . . . . . . . . . . . . . . . . . .10
Rear Panel . . . . . . . . . . . . . . . . . . . . . . . 10
Operation
General System Operation . . . . . . . . . . . . . . . 11
Recommendations for the REF 10 . . . . . . . . . . . .11
Applications
Using the REF 10 With Other Products. . . . . . . . . .12
10 MHz Compatible Products . . . . . . . . . . . . . .13
Appendix
Changing the Line Voltage . . . . . . . . . . . . . . . .15
Pin Assignment of the Terminals . . . . . . . . . . . . 15
Technical Data . . . . . . . . . . . . . . . . . . . . . .15

REF 10
4
Precautions
General Instructions
To reduce the risk of fire or electrical shock, do not expose this
device to rain or moisture,
direct sunlight or excessive heat from sources such as radi-
ators or spotlights. There are no user-serviceable parts inside.
Any repair and maintenance may only be carried out by qua-
lified personnel authorized by MUTEC GmbH. The device was
designed for operation in a standard domestic environment.
Do NOT expose the unit and its accessories to rain, moisture,
direct sunlight or excessive heat produced by heat sources
such as radiators or spotlights! A free flow of air inside and in
close proximity to the unit must always be ensured.
Initial Operation
Prior to the initial operation of the device, the unit itself, its
accessories and packaging must be inspected for any signs of
physical damage that may have occurred during transit. If the
unit has been damaged mechanically or if liquids have been
spilled inside the enclosure, the device may not be connected
to the mains power or must be disconnected from the mains
immediately! If the unit is damaged, please do NOT return
it to MUTEC GmbH, but notify your dealer and the shipping
company immediately. Otherwise, any liability claims will not
be granted.
If the device is left in a low-temperature environment for a
long time and is then moved to a room-temperature environ-
ment, condensation may occur on the inside and the exterior
of the device. To avoid short-circuits and electric shocks, make
sure to wait one or two hours before putting the device back
into operation.
Power Supply
The device contains a self-adapting, wide-range power supply
supporting the majority of global standard line voltages within
a range of 90-250 V, with no need for any user adjustments.
Make sure that your line voltage source provides a supply vol-
tage within the specified range. In addition, make sure that
the device is properly grounded via the local electric instal-
lation. Please use the enclosed power cable (see packaging)
to connect the unit to the mains power. Switch the unit off
before you attempt to connect it to the mains. Firstly, connect
the power cord to the device, then to a standard 3-pin mains
outlet. To remove the power cord never pull on the cable but
on the mains plug!
The unit must be grounded during operation! For information
on the power input module wiring, refer to the »Wiring of
connectors« section in the appendix. Disconnect the device
from the mains when not using it for an extended period!
Trademarks
MUTEC GmbH assumes no liability for any incorrect informa-
tion provided in this manual. Please note that all software/
hardware product names are registered trademarks of their
respective owners. No part of this manual may be reproduced,
copied or converted to a machine-readable form or electro-
nic media without written permission by MUTEC GmbH. We
reserve the right to change or improve our products without
further notice.
© MUTEC GmbH 2017
This symbol, a flash of lightning inside a triangle,
alerts you to the presence of non-insulated dan-
gerous voltage inside the enclosure - voltage that
may be sufficient to constitute a risk of shock.
This symbol, an exclamation mark inside a triangle
alerts you to important operating or safety instruc-
tions in this manual.
Declaration of Conformity
We herewith confirm that this product complies with the
European Commission’s standards on electromagnetic
compatibility.
Interference emission:
EN 50081-1, 1992, Resistance to interference: EN 50082-1,
1992. Presupposed as operation condition is that all signal
outputs are connected with
high-quality and well shielded
cables.

5
Warranty Regulations
§1 Warranty
MUTEC GmbH warrants the flawless performance of this pro-
duct to the original buyer for a period of three (3) years from
the date of purchase. If any failure occurs within the specified
warranty period that is caused by defects in material and/or
workmanship, MUTEC GmbH shall either repair or replace the
product free of charge within 90 days. The customer is not
entitled to claim an inspection of the device free of charge
during the warranty period. If the warranty claim
proves to be justified, the product will be returned freight
prepaid by MUTEC GmbH within Germany. Outside Germany,
the product will be returned with the additional internatio-
nal freight charges payable by the customer. Warranty claims
other than those indicated above are expressly excluded
§2 Warranty Transferability
This warranty is extended exclusively to the original buyer
who purchased the product from a MUTEC GmbH specialized
dealer or distributor, and is not transferable to anyone who
may subsequently purchase this product. No other person (re-
tail dealer, distributor, etc.) shall be entitled to give any war-
ranty promise on behalf of MUTEC GmbH.
§3 Warranty Regulations
The return of the completed registration card, or online regis-
tration on one of the websites specified below, is a condition
of warranty. Failing to register the device before returning it
for repair will void the extended warranty.
The serial number on the returned device must match the one
stated on the registration card or entered during online regist-
ration. Otherwise, the device will be returned to the sender at
the sender’s expense. Any returned device must be accompa-
nied by a detailed error description and a copy of the original
sales receipt issued by a MUTEC dealer or distributor.
The device must be returned free of shipping expenses and in
the original package, if possible; otherwise, the sender has to
provide comparably protective packaging. The sender is fully
responsible for any damage or loss of the product when ship-
ping it to MUTEC GmbH.
§4 Limitation of Warranty
Damages caused by the following conditions are not covered
by this warranty:
•Damages caused by every kind of normal wear and tear
(e.g. displays, LEDs, potentiometers, faders, switches, but-
tons, connecting elements, printed labels, cover glasses,
cover prints, and similar parts)..
•Functional failure of the product caused by improper
installation (please observe CMOS components handling
instructions!), neglect or misuse of the product, e.g. failure
to operate the unit in compliance with the instructions
given in the user or service manuals.
•Damage caused by any form of external mechanical
impact or modification.
•Damage caused by the user’s failure to connect and ope-
rate the unit in compliance with local safety regulations.
•Damage caused by force majeure (fire, explosion, flood,
lightning, war, vandalism, etc.).
•Consequential damages or defects in products from other
manufacturers as well as any costs resulting from a loss of
production.
•Repairs carried out by personnel which is not authorized
by MUTEC GmbH.
§5 Repairs
To obtain warranty service, the customer must call or write
to MUTEC GmbH before returning the unit. All inquiries must
be accompanied by a problem description and the original
buyer’s invoice. Devices shipped to MUTEC GmbH for repair
without prior notice will be returned to the sender at the sen-
der’s expense. In case of a functional failure please contact:
MUTEC Gesellschaft für Systementwicklung
und Komponentenvertrieb mbH
Siekeweg 6–8, 12309 Berlin, Germany
Phone: [phone]
Fax: [phone]
E-Mail: [email protected]
Web: www.mutec-net.com

REF 10
6
Introduction
General Description
Thank you very much for your purchase of the MUTEC REF 10,
an audiophile 10 MHz reference master clock generator.
The REF 10 is an audiophile reference master clock generating
10 MHz signals with industry-leading low phase noise (i.e. jit-
ter) to significantly improve digital playback systems. As the
conductor of your digital audio orchestra at home, the REF
10 will inspire you with unheard-of clarity, graceful dynamics,
and pure music. It is also the most flexible, most compatible
10 MHz clock on the market allowing you to spend less time
worrying about integration and leaving you with more hours
to enjoy blissful playback.
In contrast to so-called “atomic clocks”, clocks based on a
rubidium or cesium normal, the REF 10 is engineered around
MUTEC's handcrafted, oven-controlled oscillator (OCXO)
made in Germany, featuring significantly higher clock stabi-
lity in the time domain relevant for audiophile digital audio
performance. Newly developed ultra-low noise clock distribu-
tion and amplification circuits based on sub-1 Hz optimized,
lowest noise voltage sources transfer the reference signal to
the REF 10's eight outputs with virtually no losses.
As a result and unlike any other currently available reference
generator the REF 10 fulfills both of the critical requirements
for an extraordinary audiophile reference master clock:
•Lowest possible phase noise for unmatched audio
•Highest clock precision for most accurate synchronization
Due to its revolutionary clock reference and its unrivaled flexi-
bility the REF 10 can enhance the audio quality of compatible
D/A converters (DACs), music servers, and re-clockers to the
highest possible level. Unlock a more dynamic, more trans-
parent sound stage with exceptional spatiality and level of
detail, free from any digital blur. As the quasi conductor of
your digital audio orchestra at home, we are sure the REF 10
will inspire you with unheard-of clarity, graceful dynamics,
and pure music!
Features
•Audiophile 10 MHz reference generator with industry’s
lowest phase noise
•Improves and enhances compatible DACs, audio re-clo-
ckers, music servers, and master clocks
•Engineered around a handcrafted, ultra-low phase noise
OCXO made in Germany
•Revolutionary, sub-Hz optimized, lowest noise power
supply for every circuit section
•Generates a very high slew-rate square wave signal for
superior lock precision compared to the sine wave signals
used by competing brands
•Provides simultaneous reference outputs with 50 and 75
Ω impedance for maximum compatibility with clocks and
DACs by other manufacturers
•Eight galvanically isolated, individually switchable BNC
clock outputs
•Highly efficient power line filtering
•Integrated, highest-quality international linear power
supply
•Intuitive user interface with noble aesthetics
•Rack-mountable with optional mounting brackets for
studio use (2 RU)
Matching MUTEC Products
•MC-3+ Smart Clock
The MC-3+ Smart Clock is an audio re-clocker and master
clock that can enhance digital audio devices in two ways:
by providing low-jitter clock signal for external synchro-
nization and by aggressively re-clocking using MUTEC’s
REVIVE technology.
•MC-3+ Smart Clock USB
As the successor of the MC-3+ Smart Clock , the MC-
3+USB offers significantly improved audio performance
and additionally acts as an isolating USB interface for
audio computers and music servers.
•iClock & iClock dp
iClock and iClock dp are both synchronizable, highest
precision clock synthesizers with extremely low jitter
for applications in audio/video production studios and
broadcast.
Accessories
•MW-07/19: rack mount kit consisting of two mounting
brackets for installing the REF 10 in 19” racks (item no.
8020-046).

7
Product Registration for Warranty and Support
We kindly ask you to register your MUTEC product through
our website immediately after buying. This ensures full war-
ranty services over a period of three years after purchasing
the product. Additionally, we provide free technical support
for all registered products. We will also inform you about new
products and product updates (you may opt-out at any time
of course).
Please register your product at:
www.mutec-net.com > Service > Product Registration
Or for direct access type in the following URL into your
browser:
http://www.mutec-net.com/produktregistrierung.php?lng=en
facebook.com/mutecpro
pinterest.com/mutecpro
https://plus.google.com/
116705378800155548696

REF 10
8
Installation
Shipping Contents
Your REF 10 was packaged carefully. Nevertheless we recom-
mend checking the contents directly after opening the package:
1 x REF 10
1 x Power cable
1 x Manual
In the unexpected event that there are any visible damages
or missing items, please refer to the chapter »Safety Instruc-
tions« and »Warranty Regulations« for further details.
Placing the Device
The unit should be set up as closely as possible to the devices
to which it will be connected to avoid excessive cable lengths.
The four custom-designed case feet include a rubber ring pro-
tecting the ground’s surface from being damaged and redu-
cing any structure-borne vibrations interfering with the unit.
It is recommended to keep the device away from vibrating or
mechanically moving devices in close proximity.
The device can be mounted into a standard 19“ rack and will
require 2U (rack units). Therefore, we offer an optional rack
mounting kit called MW-07/19. This includes two rack bra-
ckets which need to be screwed to each side of the device‘s
case. Before mounting the device into a 19“ rack, please un-
screw the four rubber feet with a suitable screwdriver. Install
the device so that 1U of rack space is left open both above
and below the device to allow for sufficient ventilation! For
extra secure installation we further recommend an additional
rack mounting plate that will prevent any long-term mechani-
cal deformation of the enclosure.
Attention
Before installing the unit the section Safety Instructions
located at the beginning of this manual should be read
carefully! Never expose the device and accessories to
rain, moisture, direct sunlight, or excessive heat pro-
duced by radiators, heaters, or spot lights! Sufficient
air circulation in the proximity of the device must be
ensured!
Interface Connections
There are two standards with respect to interfaces and cable
termination for 10 MHz reference signals:
•50 Ω impedance termination
This standard can commonly be found among units by
Japanese Hi-Fi manufacturers, and for measurement
devices in laboratory applications.
•75 Ω impedance termination
This termination is more common for devices used in
recording, mixing and broadcast studio applications.
For audiophile Hi-Fi and high-end consumer audio applications
both standards are currently in use by different manufacturers.
For this reason, the REF 10 provides clock outputs with both 50
and 75 Ω termination that can be used simultaneously.
Transferring clock signals with 50 Ω termination is typically
done with coaxial cables according to the RG-58/U standard.
However, we recommend using cables manufactured to the
RG-400/U or CLF200/HDF200 standards, because they are
double-shielded and offer reduced attenuation in contrast to
the RG-58/U norm. Cables specified as CLF200/HDF200 further
feature a stronger inner copper conductor.
For clock signals with 75 Ω termination it is common to use
coaxial cables specified by the RG-59/U and RG-598/U stan-
dards. As an alternative, we recommend using cables manu-
factured to the RG-216/U standard, which are usually also
double-shielded, feature reduced attenuation, and a stronger
inner conductor.
A wide range of coaxial cables with BNC connectors and the
appropriate termination by specialized manufacturers are avai-
lable at Hi-Fi retailers. Depending on their price range they are
manufactured using premium materials and will have superi-
or transfer characteristics than the aforementioned standard
cables.
All interfaces of the devices in a given setup need to be pro-
perly connected with each other. Always ensure that the clock
output of the REF 10 are connected to an appropriate input
of the receiving device. Make sure that the clock input of the
receiving device has the correct internal impedance termina-
tion. This internal termination can sometimes be adjusted via
an external switch on the device or via a software setting. We
recommend double-checking the operating manual of any
device that you are planning the REF 10 to be connected to.
A mismatched termination of the system will cause losses in
signal quality and clock precision!

9
We further recommend keeping the cable lengths as short as
possible to minimize signal losses and interference. Cables at
0.5 m, 1 m, or a maximum of 2 m length are ideal. The longer
the cable needs to be, the higher the quality should be to avoid
excessive losses!
Useage of so-called BNC tee adapters
BNC tee adapters are often used to daisy-chain clock signals
between several devices. Usually this is necessary if the clock
master does not provide a sufficient number of clock outputs.
Since the REF 10 generates exceptionally low phase noise, i.e.
highest quality signals, any additional elements in the signal
path can have an attenuating effect that negatively affects the
crucial slew rate of the signal. Consequently and considering
that the REF 10 provides a total of eight clock outputs we
advise against daisy-chaining 10 MHz clock signals.
Any device that is supposed to be clocked by the REF 10 and
benefit from its audiophile performance must be connected to
a dedicated clock output!

REF 10
10
Control Elements and Terminals
Front Panel
1) »POWER«
This red LED illuminates when the device has been powered
up. First engage the rear panel power switch next to the mains
terminal. Always ensure the appropriate choice of line voltage
»115 V / 230 V«! Then, depress the front panel power switch
and the red LED will light up.
2) »OUTPUT SELECT«
This combined push button rotary encoder is used to select
the individual outputs and to disengage or re-engage them.
3) »LEDs 1 – 8«
These eight white LEDs represent the eight rear panel clock
outputs and reflect if the respective output has been turned
on or off.An illuminated LED means the output is active, i.e on.
4) »OSCILLATOR«
This blue LED reflects the status of the oscillator heat-up pro-
cess. Upon powering the device up this LED will be flashing
until the oscillator has reached its correct operating tempera-
ture. Once the temperature has been established, the LED will
be permanently lit.
Rear Panel
1) »50 , Outputs 1 – 2«
These two clock outputs are equipped with a 50 Ω terminati-
on. Use only BNC cables with the appropriate 50 Ω impedan-
ce with these outputs.
2) »75 , Outputs 3 – 8«
These six clock outputs are equipped with a 75 Ω terminati-
on. Use only BNC cables with the appropriate 75 Ω impedan-
ce with these outputs.
3) »110/120 V & 220/240 V«
This is is the line voltage selector that also serves as the holder
for the mains fuse.
Attention
It is imperative to make sure the proper line voltage has
been selected prior to powering up the device for the
first time!
Information on how to change the line voltage can be
found in the chapter “Changing the line voltage” on pa-
ge 15 in the appendix.
4) Mains Connector
Connect the supplied IEC power cable here. Make sure that
the power switch is turned off before connecting the device
to your power source.
5) Mains Power Switch
The mains power switch engages the power supply for the
device. Do not turn the unit on before completing the wiring
and installation, particularly with respect to the choice of line
voltage according to you country’s power grid. Please make
sure to read the safety instructions at the beginning of this
manual!
4
2121 3 4
3 5

11
Operation
General System Operation
Operating the REF 10 is very straight-forward! Apart from the
two power switches there is only a single push button rotary
encoder (»OUTPUT SELECT«) used to individually turn the
eight outputs on or off. Per factory default all outputs are acti-
ve upon powering up the device for the first time, so all eight
white front panel LEDs will light up accordingly!
Selecting and toggling the outputs
The front panel encoder’s action is stepped and each step will
evoke a new setting. The push button function of the encoder
is used to toggle features.
Rotate the encoder by one step to select an output and the
first LED will start flashing. Turning the encoder by another
step now will cause the next LED to flash while the previous
one returns to a steady light. Thus, it is only possible to select
one output at a time.
As long as an LED is flashing, the respective output can be
toggled with a push of the encoder. When the LED is on, the
output is active. When the LED is off, the output has been di-
sengaged. Any setting will have immediate effect - it is not
necessary to take any further actions.
The last setting of the REF 10 will be stored and preserved
after the the device has been powered down.
Recommendations for the REF 10
To ensure a long-lasting performance with optimum clock si-
gnal quality that will best enhance your connected devices
we would like to share a few recommendations for using the
REF 10.
•Prior to enjoying an in-depth listening session we recom-
mend pre-heating the REF 10 for about 20-30 minutes.
While the heater generally reaches its operating tempe-
rature in about five minutes, the entire oscillator section
takes longer to fully warm up. To ensure optimal perfor-
mance and highest frequency stability, you should grant
the REF 10 this additional warm-up time.
•Keeping the REF 10 permanently powered up is generally
not required as long as you observe the extended warm-
up period described above. We do however advise against
power cycling the REF 10 in short, repeated intervals!
•The REF 10 should always be placed away from mecha-
nically vibrating devices (such as turn tables). Although
the REF 10’s case feet of the are equipped with isolating
rubber rings, excessive structure-borne vibrations can
nonetheless interfere with the oscillator and negatively
affect the clock performance and signal quality.
The REF 10 should furthermore not be placed in close pro-
ximity to devices emitting strong electromagnetic fields
(such as fluorescent lamps). Even though the electronics
of the REF 10 are encapsulated in a steel enclosure these
strong electric fields can interfere with the sensitive elec-
tronics and also negatively affect the signal quality.
•We generally recommend disengaging all clock outputs
that are not used for your given setup to reduce potential
interference as much as possible. Additionally, unused
and disengaged outputs can be fitted with so-called BNC
termination plugs. These are available from retailers with
both 50 and 75 Ω matching both of the REF 10s output
terminations.

REF 10
12
Applications
Using the REF 10 With Other Products
This chapter serves to illustrate several possible applications for the REF 10 and will help you achieve the best possible sonic
results. In general, the REF 10 can be used for the following applications:
•As an audiophile performance enhancement for compatible DACs, master clocks, and audio re-clockers.
•As an ultra-low noise, high stability clock reference for the entire digital audio chain at home or in the studio.
•As an ideal high-end upgrade for MUTEC’s own MC-3+, MC-3+USB, and iClock/iClock dp master clocks.
•To stabilize existing audio clock generators.
To explain these applications it is important to understand that the REF 10 is a reference master clock exclusively generating hig-
hest quality 10 MHz clock signals. Compatible devices can use this ultra precise reference clock signal to perform their own signal
processing with more accuracy and fewer errors, yielding a better sound quality. It is crucial to understand that these 10 MHz
clock signals are entirely independent from the audio clock (typically 44.1 kHz up to 192 kHz) of the playback! As a consequence,
the REF 10’s clock signal is not compatible with the common Word Clock audio clock that is also transmitted via 75 Ω BNC cables.
There are two possible routes to harness the superior clock precision of the REF 10 in your digital audio system:
•You have a DAC, network bridge, streamer or audio re-clocker with its own 10 MHz compatible input.
•You have an audio master clock that can take the 10 MHz clock from the REF 10 and convert it into standard a Word Clock
audio clock to be distributed to other devices.
The simplest possible application for the REF 10 would look like this:
Thanks to a total of eight clock outputs on the REF 10 any 10 MHz compatible device in a setup can and should receive its own
dedicated clock supply.We strongly advise against daisy-chaining multiple devices using so-called BNC tee adapters (more about
this on page 9).
Particularly the combination of the REF 10 with MUTEC’s own MC-3+ and MC-3+USB Smart Clocks offers exciting applications to
achieve the best-possible quality enhancements by re-clocking digital music sources. To understand this scenario, please imagine
the following setup as a starting point:

13
In this application example we have several digital sources on the left that are used to play back music via several digital in-
terfaces (e.g. AES3, S/P-DIF or USB). The MUTEC MC-3+ or MC-3+USB act as audio re-clockers to enhance the music signal and
remove jitter before passing the signal on to the DAC (d/a converter) and the loudspeakers.This is a simple closed system in which
the audio clock rate is determined by the music source. All other devices following in the chain (audio re-clocker and DAC) will
adapt to the sampling rate set by the source.
This particular system can be enhanced by the REF 10 in up to three places, depending on how many of the digital devices offer a
10 MHz compatible input. In the best possible case, all of the digital sources (e.g. BlueRay player, streamer, network bridge), the
audio re-clocker, and the DAC can receive their own 10 MHz clock supply from the REF 10.
It is helpful to understand that the hierarchy with respect to the audio clock (i.e. the sampling rate) of the system remains un-
changed. The 10 MHz signal from the REF 10 is strictly used to enhance the performance of the connected devices and does not
make changes to the audio clock of the system. The sampling rate of the system is still determined by the music source, which is
important to know when playing back playlists with mixed sampling rates.
Of course this application example is also conceivable without using an audio re-clocker between the digital sources and the
DAC. In this case, the REF 10 can still yield a significant improvement in sound quality, as long as at least one of the other devices
is equipped with a 10 MHz compatible clock input.
To help you getting started in the “10 MHz” universe we have put together a comprehensive list of currently available 10 MHz
compatible devices.

REF 10
14
10 MHz Compatible Products
Manufacturer Product Impedance (Ω) Type
MUTEC MC-3+ Smart Clock 75 Audio Re-Clocker, -Clock Generator
MC-3+ Smart Clock USB 75 Audio Re-Clocker, -Clock Generator,
USB Interface
iClock, iClock dp 75 Audio/Video Clock Generator
Abendrot Audio Hengst 50 DAC
Antelope Audio Zodiac Platinum 75 DAC
Rubicon 75 DAC
LiveClock 75 Audio Clock Generator
Isochrone OCX, OCX HD, OCX-V, Trinity 75 Audio/Video Clock Generator
Audio Design SyncroGenius HD-Pro 75 Audio/Video Clock Generator
Aurender W20 k. A. Music Server
Brainstorm DCD-12 k. A. Audio/Video Clock Generator
CH Precision C1 75 DAC
D1 75 SACD Transport & DAC
Esoteric Grandioso G1 50 Audio Clock Generator
Grandioso K1 50 SACD Player
Grandioso P1/D1 50 SACD Transport & DAC
K-01X, K-03X, K-05X, K-07X 75 SACD Player
P-02X, P-05X 50 SACD Transport
D-02X, D-05X 50 DAC
N-05 75 Network Player
G-01X, G-02X 50 Audio Clock Generator
Evertz 5601MSC k. A. Audio/Video Clock Generator
dCS Vivaldi Master Clock 75 Audio Clock Generator
Paganini Master Clock, Scarlatti Master Clock
(discontinued) 75 Audio Clock Generator
M2TECH EVO DAC TWO PLUS 75 DAC
HIFACE EVO TWO k. A. DAC
Phasetech/Phase-
mation HD-7A 50 DAC
RATOC RAL-DSDHA2 50 DAC
Rostec ASD16HD 75 Audio/Video Clock Generator
Sforzato DSP-00EX 50 Network Player
DSP-010EX, DSP-030EX 50 Network Player, DAC
DSP-04EX 50 DAC
SOtM sMS-1000SQ (with sCLK-EX Expansion) 50/75 Musik Server
sMS-200ultra (with sCLK-EX Expansion) 50/75 Network Player
tX-USBultra (with sCLK-EX Expansion) 50/75 USB Regenerator
SPEC RMP-X1 50 Network Player
Sound Warrior SWD-CL10 50/75 Audio Clock Generator
Disclaimer: Compatibility of the REF 10 with the above listed products is assumed based on the specifications published by the respective manufacturers and subject to change.
MUTEC is not liable for compatibility issues with third-party products operating outside of industry standards.

15
10 MHz Compatible Products
Appendix
Changing the Line Voltage
Always unplug the mains cable before changing the line
voltage fuse!
On the left hand side of the mains power module on the rear
you will see two small triangles facing each other (see left
arrow in picture above). The respective line voltage »110-120
V« or »220-240 V« is printed above the right triangle. If this
setting should not be appropriate for your power grid, the fuse
holder (see right arrow in picture above) needs to be pulled
out, rotated by 180° around its own axis, and be put back in
place. You should then see that the triangle now indicates the
correct line voltage. It is easiest to remove the fuse holder by
inserting a small flat screwdriver in the groove on the right
side of the fuse holder to pull it outwards.
Make sure that the fuse holder is properly seated in its
housing with its top flush to the power!
Pin Assignment of the Terminals
Mains In
1) Neutral (N)
2) Protective Earth (E)
3) Live, Phase (P)
Technical Data
Interfaces:
•2 x BNC, unbalanced, 50  terminated, buffert
•6 x BNC, unbalanced, 75  terminated, buffert
Signal format of all clock outputs
•Square wave, 10.000 MHz, 2 Vpp, 50:50 duty cycle
Clock Generation:
•Type: 10.000 MHz ultra-low phase noise oven-controlled
crystal oscillator
•Frequency accuracy when shipped: < ±0.01 ppm
•Frequency stability vs. temperature range: < ±0.01 ppm
within -20 °C to +70 °C (-4 °F to +158 °F)
Fuse HolderTriangles
1
2
3
BNC-Ausgang 50/75 Ω
1) Signal
2) Ground
1
2
Manufacturer Product Impedance (Ω) Type
Tascam CG-1000, CG-1800, CG-2000 50/75 Audio/Video Clock Generator
Teac UD-503, NT-503 50 DAC, Network Player
TechDAS D-7, D-7i 50 DAC
Disclaimer: Compatibility of the REF 10 with the above listed products is assumed based on the specifications published by the respective manufacturers and subject to change.
MUTEC is not liable for compatibility issues with third-party products operating outside of industry standards.

REF 10
16
•Short termi stability (Allan Deviation): 1×10-12
(typically, Tau = 1s)
•Aging after 10 days operation: : < +/-0.0005 ppm (per
day), < +/-0.05 ppm (first year), < +/-0.3 ppm (ten years)
•Warm-up time at +25 °C (+77 °F): <5 min
Phase noise, measured at REF 10's outputs:
•1 Hz: ≤ -116 dB/c
•10 Hz: ≤ -142 dB/c
•100 Hz: ≤ -155 dB/c
•1000 Hz: ≤ -160 dB/c
•Noise Floor: ≤ -166 dB/c
(Disclaimer: All measurement figures represent avera-
ge values. Minor production related deviations will be
expected.)
Power Supply:
•Type: internal, linear dual power supply
•Input voltages: 90-125 V / 200-240 V, 50-60 Hz
•Power consumption: 12 W during oscillator warm-up, 8 W
nominal operation
Mechanical Details:
•Enclosure size/material/color: 196 x 84 x 300 mm (W x H
x D, without connectors and case feet), 1,5mm steel, black
powder-coated
•Front panel size/material/surface/color: 198 x 88 x 8 mm
(W x H x D), aluminium, anodized incl. anodic printing or
silk screening, aluminium- or black-colored
•Weight: approx: 4350 g (9 lb, 9.5 oz)
REF 10 Order Information:
•Front Aluminum-colored: Item No. 8015-105,
EAN Code: 4260342461044
•Front black-colored: Item No. 8015-106,
EAN Code: 4260342461051
Jitter [fs]
0,0
5,0
10,0
15,0
20,0
25,0
30,0
35,0
40,0
1,0E+00 1,0E+01 1,0E+02
Hz
fs
Phase Noise
-180
-170
-160
-150
-140
-130
-120
-110
-100
1,0E+00 1,0E+01 1,0E+02 1,0E+03 1,0E+04 1,0E+05 1,0E+06
Hz
dBc/Hz