Gryphon Zena User manual

v.1.0
Zena
Owner´s Manual

2
Table of Contents:
Introduction.............................................3
The Gryphon ..........................................3
The Man .................................................4
Made in Denmark...................................4
Musical Objectives .................................4
Design Principles.................................... 5
Exterior Design.......................................7
Manufacture and Assembly.................... 8
SAFETY INSTRUCTIONS .....................8
Placement: .............................................8
AC Voltage .............................................8
Burn-In and Warm-Up............................ 9
Menu-activated functions .......................9
Balanced Connections .........................14
Choice of Cables..................................14
Care & Maintenance.............................15
OPTIONAL PS2 Phono module...........16
Optional Zena DAC module ................17
Remote Codes .....................................23
Warranty & Support..............................24

3
Introduction
Welcome to the global family of proud owners of fine audio
components from Gryphon Audio Designs of Denmark.
Your new Gryphon unit has been painstakingly designed to re-create
the sound of live music taking place in its original recorded space.
Every Gryphon product is designed to cater to the needs of the most
discerning music enthusiast with sumptuous styling and superb user-
friendliness which elevate it above the mundane world of
conventional audio components.
As audiophiles, the members of the Gryphon design team are
constantly reminded to keep their priorities straight. We are not
involved in “Hi-Fi” for its own sake, but strictly as a means to an end,
in the service of our life-long love of the live music experience in all
its sonic and emotional glory.
Our higher goal is to bring to the listener a “You-Are-There”
sensation. In taking up this challenge, the Gryphon designers go back
to basics to analyze the essential nature of the live music experience.
For us, an awareness of sound-staging, ambience and concert hall
dimensions are necessary components. Dynamics and an
unambiguous sense of instrument location even in the loudest
passages are also high priorities. To achieve these objectives,
Gryphon products offer exceptional speed and agility along with
seamless coherence in the time domain.
Since 1985, Gryphon Audio Designs has quietly gone about the
business of creating fine home audio components.
We know that you will appreciate and enjoy the benefits of our
accumulated experience and share our abiding passion for music.
The Gryphon
In Greek mythology: A fabled creature, half-lion and half-eagle,
combining the power of the “King of Beasts” with the grace of the
“King of Birds”. The guardian of the source of gold and protector of
the Dionysian cup of infinite wealth.
In the real world: An acclaimed Danish audio engineering company
employing cutting edge technology and common sense in the pursuit
of the purest musical experience. We feel that the gryphon is an
appropriate symbol for our high sonic goals.

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The Man
Gryphon Audio Designs is the brainchild of Flemming E. Rasmussen
and the fulfillment of a lifelong dream to allow the purest essence of
the live music experience to be recreated in the home environment.
Rasmussen holds a degree in painting and graphic arts from the
Aarhus Art Academy, Denmark. During his studies, Rasmussen
developed close relationships with the local music community and
designed many LP covers and concert posters. After graduation, he
taught photography and painting and designed textiles, before
founding 2R Marketing, which quickly became Denmark’s leading
High-End audio import company.
Gryphon Audio Designs was founded in 1985 as an offshoot of 2R
Marketing. The first product, the now legendary Gryphon Head Amp,
grew from a one-off spare time project developed only for the
designers’ own home systems. Although the Gryphon project was
initially strictly a hobby, not an actively pursued commercial venture,
demand generated by reviews and word-of-mouth led to the formal
establishment of Gryphon Audio Designs as a separate corporate
entity.
Following the immediate success of the Gryphon brand, all import
business was phased out in 1993, so that Rasmussen could dedicate
his efforts entirely to Gryphon.
Made in Denmark
Every product from Gryphon Audio Designs is designed and built in
Denmark. This is much more than just a geographical fact. It is also
a seal of approval, a stamp of quality. Living in a region with no
natural resources (no oil, coal, precious metals, etc.), the Danes have
learned to rely on their quick wits and skilled hands. Innovative
technology, beautiful craftsmanship, pride in one’s craft and a keen
eye for attractive design are some of the long-standing Danish
traditions which are distilled to their finest essence in every unit that
bears the Gryphon name.
Musical Objectives
While scientific method and sophisticated technology play an
important role in our electronics design work, at Gryphon we never
lose sight of the fact that the keen ears of an experienced listener are
the most crucial “calibration tools.” Therefore, every Gryphon product
The Gryphon Head Amp 1985

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exists for one simple purpose: To bring the user closer in the never-
ending quest for a more natural and convincing musical illusion.
Every Gryphon design has been built to cruise effortlessly through
even the most demanding musical passages, regardless of volume
level, with a musical presentation defined bysupreme articulation and
immediacy, subtle dynamic shading and razor-sharp focus.
Refinement and delicacy are combined with power and authority for
a natural, involving listening experience.
The Gryphon Master Tape Collection
In the Gryphon listening rooms, we have over the years used a
unique library original master tapes of recordings made during the
Golden Age of studio engineering from 1956-1976.
Unlike conventional commercial releases, the master tapes capture
the dynamic contrasts and subtle inner harmonic structure of the
musical event, forcing us to work to a higher standard in our efforts
to maintain the integrity of the original musical performance.
Design Principles
Withstate of the art technical equipment and some of the finest minds
in the audio engineering field at our disposal, the Gryphon brand
name continues to define the highest audiophile standards of
subjective and technical performance.
The dual mono configuration radically eliminates any possibility of
crosstalk or other interference between channels and provides infinite
channel separation which contributes to the ability to create space,
focus, depth and transparency.
Because the electrical power coming out of your wall fluctuates wildly
in terms of voltage and distortion, Gryphon incorporates heavily
regulated multi-stage power supplies that act as effective mains
conditioning filters. Displays and control circuits are fed by a separate
power supply to isolate any digital noise artifacts and effectively
prevent them from contaminating the signal path.
While the printed circuit boards in more conventional audio products,
utilize conductor tracks a mere 35 um thick, Gryphon employs at least
70 um traces of the highest purity.
Beginning with our very first product, “The Head Amp” all Gryphon
products have featured extremely wide frequency bandwidth,
because the ability to reproduce ultra-sonic frequencies with no
difficulty ensures linear phase across the audible frequency range.
The house of Gryphon, this is where all
Gryphon products are developed.
Manufacturing is in the hands of a select
number of highly specialized danish
companies.
We take the ”Made in Denmark” very
seriously.
Gryphon is located in beautiful tranquil
surroundings.

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The implementation of circuits with wideband frequency response is
a painstaking endeavor in which the actual layout and ground pattern
of the PC boards are crucial to the achievement of superior sonic
performance with no loss of inherent stability.
Wideband frequency response ensures the high slew-rate essential
to the realistic handling of the ultra-fast transients which routinely
occur in live music and is crucial in recreating the natural decay of
musical instruments. Wide bandwidth also improves phase
characteristics, for more correct sound-staging and imaging.
All Gryphon designs are realized with none or an absolute minimum
of negative feedback, which when present in large amounts can
actually increase TIM-distortion. All Gryphon preamplifiers are
designed with zero negative feedback. Only the Gryphon Antileon
series of power amplifiers have a minimum amount of negative
feedback for improved linearity and bandwidth.
Gryphon research into the detrimental effects of magnetically induced
distorted (MID) has led to the elimination of magnetizable materials
wherever possible. To eliminate the effects of stray magnetic fields,
non-magnetic materials are employed throughout, with the
unavoidable exception of the transformer shield box.
The mechanical design of the cabinet and assembly methods are all
carefully calculated to ensure minimal resonance, either through the
use of mechanically grounded high mass or decoupling. Vibration-
sensitive components, capacitors in particular, are thus guaranteed
a non-resonant environment.
The heavy, thick chassis offers a vibration-proof environment for the
sensitive electronics inside and provides crucial shielding from a
polluted world of low and high-frequency radio waves, power-line
radiation and other electrical interference. Meticulous attention to
such issues makes a significant contribution to the relaxing, open and
transparent Gryphon sound.
Unique, non-invasive protection circuitry offers reliable, fuss-free
protection without compromising signal purity and signal path
simplicity, with no conventional relays in the signal path to degrade
or compress sound.
The ground path has been carefully laid out in order to achieve
superior sonic performance with no loss of stability. Component
layout has been designed to ensure the shortest conceivable signal
path.
Section of exploded-view drawing

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Exhaustive investigation underlies the selection of every component
part and many original, proprietary components are custom-built
exclusively for Gryphon. Because what is left out is just as important
as what goes in, an absolute minimum of internal wiring is included.
By lavishing attention on each aspect of the circuit and fully
understanding the purpose and behavior of every single part of the
whole, our designers can optimize performance in each section,
before moving on to the next step. This ensures simplicity, a short
signal path and a unity of purpose with a single, well-defined
objective: musical purity.
In the interest of ultimate fidelity, tone controls, balance-controls and
other unnecessary components have been banished from the signal
path.
Exterior Design
From the very beginning, every Gryphon product has offered
stunning audio performance, sumptuous styling and superb user-
friendliness, catering to the needs of the discerning audiophile who
demands musicality, convenience and aesthetics, all without
compromise.
In every Gryphon product, form follows function in a unique synthesis
of aesthetics and practicality. Gryphon stands for sophisticated
technology with a high standard of industrial finish that also
incorporates the best of handcraftsmanship.
The peerless finish, build quality, ergonomics and pride of ownership
that contribute to the totality of the Gryphon concept can only be fully
understood and appreciated up close and in person.
Rasmussen’s background in fine arts and industrial design gives
every Gryphon product a distinctive, luxuriant finish which arises
organically out of the audio circuit design and the user interface for a
truly unique integration of form and function.
Close-up detail of the Zena front/top

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Manufacture and Assembly
At our laboratories and manufacturing facilities in Denmark, we
maintain full control over every aspect of development and
production, and the members of our conscientious staff diligently
follow each Gryphon model from initial concept to early prototype,
through to final quality control.
Printed circuit boards are assembled by a supplier of precision
military and medical equipment with strict standards of quality control
and pre-inspection of components. Chassis parts are manufactured
by a specialist chosen solely for the outstanding quality of
workmanship. In every aspect of every Gryphon product, the same
stringent standards of excellence apply.
Each unit is individually tested, after a 48-hour burn-in sequence,
each product is undergoing both electronically and audio
performance tests again.
Placement:
Do not place the Zena on or near any source of heat such as power
amplifiers. Do not place any object on the top covering the ventilation
holes of the Zena. Do not place the Zena in an enclosed space such
as a cabinet unless ample ventilation is provided. If these guidelines
are not observed, overheating may result.
Mains Switch:
To power your Zena fully ON/OFF use the main switch. The switch is
located in the bottom on the right side just beneath the acrylic front
panel.
AC Voltage
Your Gryphon unit is especially made for the AC voltage of the
country to which it has been shipped. If the voltage has been
changed, the warranty is void and the product may be unsafe or
malfunction.
Correct AC polarity contributes greatly to optimum performance. If
you are not using a three-pin, non-reversible power plug, please
experiment with the orientation of the plug for optimum performance.
The main ON/OFF switch on the
Zena is placed on the bottom right
side of the unit near the front.
If the blue LED to the left of the
ON/STD symbol is flashing 3 times
in STB mode, it indicates wrong
/defective AC mains voltage.
SAFETY
INSTRUCTIONS

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Burn-In and Warm-Up
Your Gryphon unit has been thoroughly tested and burned in before
shipping. Performance will continue to improve during the first 40 –
50 hours of normal use. After this period optimum performance will
be reached approximately 45 minutes after turn-on. With the
exception of Class-A power amplifiers, we recommend leaving your
Gryphon components powered up at all times.
Menu-activated functions
The Gryphon Zena incorporates several functions which are
accessed via a Menu system.
To access the Menu, press Menu. MENU will appear in the display.
Exit will blink. To enter the menu, press input up/down and then
monitor. The Zena will mute its outputs.
If you do not wish to access the menu-controlled functions, press
Monitor when exits blink. You will then return to normal playback
mode and default display.
When you enter the Menu, NAME INPUT will appear in the display.
Press Menu again to move through the menu-con-trolled functions in
the following order:
Name Input - Change Max Level - Change Start Level - Brightness -
Input level match –Green Bias Setup - Dedicate input 3 to AV -
Restore Settings - Continue/Exit
At the end, you can either continue from the beginning of the list or
exit the Menu. To return to the top of the list, press Monitor and NAME
INPUT will appear in the display. To exit the Menu, press an Input
button so that EXIT blinks in the display, then press Monitor to return
to normal playback and to the normal display. Any settings which you
have changed are automatically stored in memory.
Naming Inputs
You can assign a specific name to each input, either a pre-
programmed standard name or a custom name of your choice of up
to 8 characters. When NAME INPUT appears in the display, press
Monitor. SELECT INPUT: 1 will appear in the display. To choose a
different input for naming, press an Input button to move up or down
through the five inputs. When the number of the input which you wish
to name is displayed, press Monitor. CUSTOM will blink in the
display. If you wish to create a custom name for the input, press
Monitor and skip to section 1.a. below. If you wish to select a name

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from the standard list, press an Input button so that STANDARD
blinks, then press Monitor and skip to section 1.b. below. Please note:
If a name has previously been assigned to the input, that name will
be deleted if you press Monitor while STANDARD is flashing.
1.a. If you have chosen custom naming, CUSTOM will appear in the
first line of the display. The selected input number will appear in the
second line, followed by a colon (:) and a cursor marking the first
position in the 8-character name which you can create. If a custom
name has already been assigned to this input, it will be displayed. To
select a character (letter, number, symbol, empty space or
punctuation mark) for the first position, continuously press one of the
Volume buttons until the desired character is displayed. Press Input
Up to move to the next position, then use the Volume buttons to select
the desired character. Repeat for each character in the name. If you
make a mistake or change your mind, use the Input Down button to
move back and change a previously selected character. When the
name is complete, press Monitor. The name is now stored in memory
and will be displayed each time you select that input. NAME INPUT
will appear in the display. You can go back to step 1 above to name
another input or press Menu to select the next menu-controlled
function.
1.b. If you have chosen standard naming, SELECT STANDARD
NAME will appear in the first line of the display. The selected input
number and the first name in the standard list (CD) will appear in the
second line. To select the name which you wish to assign to the input,
press the volume buttons to move up or down through the standard
name list in the following order:
CD –DVD –DSD –TUNER –TAPE –PHONO –AUX
When the name which you wish to assign to the input is displayed,
press Monitor. The name is now stored in memory and will be
displayed each time you select that input. NAME INPUT will appear
in the display. You can go back to step 1 above to name another input
or press Menu to select another menu-controlled function.
Setting Maximum Level
You can select and store in memory a maximum volume level
(between 0 and 42) which cannot be exceeded, manually or by
remote, until you re-set this function. This effectively protects your
audio system from expensive accidents. When CHANGE MAX
LEVEL

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appears in the display, press Monitor. MAX LEVEL: and the currently
assigned maximum volume setting will appear in the display. To
change this setting, press Volume Up or Down until the desired
maximum volume level is displayed. Press Monitor. The selected
maximum volume setting is now stored in memory. CHANGE MAX
LEVEL will appear in the display. Press Menu to select the next
menu-controlled function.
Setting Start-Up Level
You can select and store in memory a default volume level (between
00 and 26) which will automatically be set by the amplifier each time
you turn it on. When CHANGE START LEVEL appears in the display,
press Monitor. START LEVEL: and the current default start level will
appear in the display. To change this setting, press Volume Up or
Down until the desired start level is displayed. Press Monitor. The
selected start level is now stored in memoryand will be set each time
you turn on the amplifier. CHANGE START LEVEL will appear in the
display. Press Menu to select the next menu-controlled function.
Setting Display Brightness
You can select and store in memory the desired level of brightness
in the front-panel display. When BRIGHTNESS CONTROL appears
in the display, press Monitor. 100% will appear in the display. Choose
between 100%,75%,50%,25% and Off. Press an Input button
repeatedly until the desired level of brightness appears. The display
will immediately change to the selected brightness, unless you have
selected OFF. If OFF is selected, the display will turn off after you exit
the Menu. Press Monitor. The selected brightness level is now stored
in memory. BRIGHTNESS CONTROL will appear in the display.
Press Menu to select the next menu-controlled function.
NOTE: When the display is turned completely off, pressing any button
on the front panel or on the remote will cause the display to turn on
briefly so that you can see the current volume level and selected
input. Press a second time to activate the desired function.
Input level match
Within the level match menu, you must choose the input that you wish
to adjust. This is done with the input up/down buttons.
After you have selected your input you can increase the level in 2dB
steps from 0 dB - 8dB.
Default is 0 dB on all inputs.

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Green Bias set up
Within the Green bias set up menu you can choose the following
settings:
Low setting:
Vol. 00-09 Bias low
Vol. 10-19 Bias medium
Vol. 20-42 Bias high
High Setting:
Vol. 00-15 Bias low
Vol. 16-25 Bias medium
Vol. 26-42 Bias high
Assigning Input 2 or 3 as a Dedicated AV Connection
You can use the Zena with a stereo power amplifier in a normal stereo
set-up but using a separate surround processor.
Connect the left and right front channels from your surround
processor to either Input 2 or Input 3 of the Zena and use the Menu
to configure this input. The Zena will then be set to a fixed volume
level (0dB) when selecting this dedicated AV input. This allows you
to enjoy the full performance of the Zena for stereo and surround
sound listening without placing any sound degrading components in
the stereo signal path.
CAUTION: When Input 2 or 3 is set up as a dedicated AV connection,
the Zena gain is automatically set to 0dB. The signal from the
surround processor is NOT attenuated by the Zena and MUST be
calibrated and attenuated by the surround processor.
When DEDICATE INPUT TO AV appears in the display, press Menu
to select the next menu-controlled function, if you do NOT wish to
connect the left and right front channels from a surround processor
to Input 2 of the Athena.
If you do wish to make a dedicated AV connection to either Input 2 or
Input 3, press Monitor at the relevant function.
“INPUT: none” will appear in the display. Press INPUT UP or DOWN
touch button to select between INPUT 2 (XLR) or 3 (RCA). Confirm
your selection by touching the MONITOR button.
WARNING! NO ATTENUATION will blink in the display for 5
seconds, after which you will be asked to confirm that you wish to
configure this input as a dedicated AV connection. ARE YOU SURE?
will appear in the first line of the display. NO and YES will appear in
the second line. NO will blink. If you do NOT wish to make a dedicated
AV connection, press Monitor while NO is flashing, then press Menu
to select the next menu-controlled function.

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If you do wish to make this AV connection, press Input Up so that
YES blinks in the display. Press Monitor. This selected input is now
configured as a dedicated AV connection input, which sets the Zena
volume control to 0dB. This dedicated AV input should ONLY be used
with a source which has its own volume control, such as a surround
processor. NEVER connect a normal line-level source such as a
tuner, CD player, etc. directly to this input, while it is configured in this
manner. You can always restore Input 2 or 3 to normal operation via
the Menu.
When you have configured Input 2 or 3, “DEDICATE INP.2 (or 3) TO
AV”will appear in the display. Press Menu to select the next menu-
controlled function.
Restoring Default Settings
You can delete all your custom Menu settings and return to the
factory pre-set default settings.
Doing so deletes all input names, sets Maximum Level at 42, sets
Start Level at 00, sets Brightness at 100%, sets default input names
and sets Input 2 or 3 as a normal audio input.
When RESTORE SETTINGS appears in the display, press Monitor.
RESTORE? appears in the first line of the display. NO and YES
appear in the second line. NO will blink. If you do NOT wish to delete
your custom settings, press Monitor, while NO is flashing, then press
Menu to select the next menu-controlled function.
If you do wish to delete all your custom settings, press Input Up until
YES blinks, then press Monitor. You have now deleted all your
custom settings. The factory preset default settings are now in effect.
RESTORE SETTINGS will appear in the display. Press Menu to
select the next menu-controlled function.
Exiting the Menu
When CONTINUE and EXIT appear in the display, you can either exit
the Menu or return to the beginning of the list of menu-controlled
functions.
To go to the top of the list, press Monitor while CONTINUE is flashing.
To exit the Menu, press an Input button so that EXIT blinks, then
press Monitor to return to normal playback and to the normal display.

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Subwoofer connection
This single ended RCA output allows you to connect an active
subwoofer or a second power amplifier. This output is full range but
generated with a high-grade Op-Amp.
Green Bias
If you are using a compatible Gryphon power amplifier, you may
choose to connect the Green Bias control link for automatic regulation
of Class A bias of your power amplifier.
12V Link
12V LINK IN is for switching the Zena between standby and ON when
connected to a unit with same feature and protocol.
12V LINK OUT is for switching other compatible units between
standby and ON following the standby/ON state of the Zena.
Balanced Connections
All Gryphon products uses the AES standard for balanced
connections.
1. Ground 2. Positive 3. Negative
We recommend the use of dedicated balanced cables. Avoid the use
of adaptors as they degrade performance.
Zena Volume control
A unique new volume control was developed for the Zena and this
new principle will in future be found in all Gryphons top of the line
products. It is not a digital device, but a discrete solution based on
fixed resistors in an ultra-short signal path involving a very small
number of relays selected for perfect function and sonic “invisible”
qualities. This technology can sometimes - depending on the material
played - make a very small clicking noise when used. This is not a
sign that anything is wrong and is normal.
Choice of Cables
Because your Zena preamplifier is a high-resolution Gryphon audio
device, it will immediately reveal the characteristics and possible
limitations of the other components in your system, as well as those
of the interconnects and loudspeaker cables used to connect your
system.

15
Wiring should never be utilized as "equalizers" to correct errors
elsewhere in the system. Instead, any error should be corrected at
the source, so that interconnects and loudspeaker cables can be
selected solely on the basis of sonic neutrality. For this reason, we
employ Gryphon's own range of interconnects and cables in every
stage of the design of every Gryphon product.
Care & Maintenance
Gryphon products are handcrafted by individuals who take great
pride in the high level of fit and finish which we achieve. To maintain
your Gryphon components in pristine condition, please follow these
simple instructions.
Metal surfaces may be cleaned with a damp cloth. Some product
made for treatment of vinyl interiors in cars may be useful. Test the
product on a non-visible surface, before using any fluids.
Acrylic surfaces should only be wiped with a very soft, dry cloth. Small
scratches may be removed with fiberglass polish. Fingerprints may
be removed with a damp cloth. Do NOT use spirits or paper tissue.

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OPTIONAL PS2 Phono module
Gain:
Moving Coil (MC)
Moving Magnet (MM)
64dB
42dB
Impedance:
Moving Coil (MC)
Moving Magnet (MM)
20 or 100 Ohm
47 kOhm/200pF
S/N ratio:
MC, Input 250mV, 1kHz:
MM, Input 2.5mV, 1kHz:
>72dB
>84dB
Input impedance in MC mode
With the (red) jumper placed to the right side of the jumper sockets (JP101) and (JP301) the input
impedance will be 100 Ohm in MC mode.
With the jumper placed to the left side of the jumper socket the input impedance will be 20 Ohm in MC
mode.
Input impedance in MM mode
The input impedance in MM mode is 47kOhm/200pF.
Switching between MM and MC
The selection of MC or MM is made with jumpers JP100, JP102, JP104, JP300, JP302, and JP304

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The Zena DAC module is the perfect match for the Zena preamplifier,
adding 5 top notch digital inputs to the Zena’s existing five analog
inputs. With the DAC module build in, the Zena display informs you
about the chosen digital input Sampling frequency, PCM/DSD format
and chosen digital filter setting.
Zena display DAC information, example
‘06:’ actual digital input number (06 to 10).
‘USB’ input name, which can be changed via the Zena menu, please
consult the Zena user instruction for details.
‘FS:’ actual sample frequency.
‘Padlock symbol’: Zena DAC locked/unlocked to input signal
‘FILTER:’ Actual format being played, PCM or DSD and actual Digital
Filter being used.
‘06’ actual volume level (00 to 42).
Blue LED indicator to the left of ON/STB symbol: Flashing when
Zena (with DAC module installed) is ON, indicates that the USB
Super-Cap supply is being charged. This can take up to 4 minutes,
depending upon the degree of Super-Cap discharge, at the time the
Zena is powered up. The blue LED indicator stops flashing when the
USB Super-Cap supply is fully charged.
Changes the Zena input down by one step. Input 01 to 05 are analog
inputs. Input 06 to 10 are digital inputs and are only present when the
Zena DAC module is installed.
Changes the Zena input up by one step. Input 01 to 05 are analog
inputs. Input 06 to 10 are digital inputs and are only present when the
Zena DAC module is installed.
Zena DAC ‘MENU’ guide:
To be able to navigate through the DAC menu options, after entering
the Zena MENU option, some of the Zena front touch buttons
changes function:
MENU button is now used to toggle through the Zena menu options.
MON.(MONITOR) now acts as the menu ENTER button, confirming
the selected option
Optional
Zena DAC module

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INP. down and - up buttons now scroll down and up between the
possible sub-menu settings.
VOL. down and ‘VOL. up buttons are used to scroll between the
possible digital filter and gain settings.
CHANGING STANDARD DAC SETTINGS:
When the Gryphon Zena DAC module is installed in the Zena, it is
possible to change several standard Digital Filter and output settings
via the Zena ‘MENU’ function. The standard settings were chosen by
Gryphon because these standard settings perform very well
sonically. Regarding sound quality; we recommend using a high
quality high-end USB cable between the PC/Mac and Zena DAC USB
input –not a standard USB data cable.
Access the ‘DAC SETUP’ sub-menu by touching the following Zena
front touch button combination:
‘MENU’
‘MON.’
5 times ‘MENU’
‘MON.’
The Zena display shows now: ‘PCM DSD GAIN’ where ‘PCM’ is
flashing, indicating the actual choice. Touch the ‘INP. down or ‘INP.
up to toggle between the ‘PCM DSD GAIN’ options. Confirm the
actual choice by touching the ‘MON.’ button.
If selecting ‘PCM’, it is now possible to change the Zena DAC’s digital
filter slope for the PCM format:
‘PCM FILTER: SLOW’ indicates Slow Roll Off (short Group Delay)
digital filter (standard setting).
‘PCM FILTER: FAST’ indicates Sharp Roll Off (long Group Delay)
digital filter.
Confirm the chosen setting by touching the ‘MON.’ button.
If selecting ‘DSD’, the following DSD digital filter options are possible:
‘DSD FILTER: x0kHz’ ‘DSD LP FILTER: OFF’
Touch ‘INP. down or ‘INP. up to toggle between the options above.
Use ‘VOL. down (or ‘VOL. up ) to select between ‘50kHz’, 60kHz’ or
‘70kHz’, -3dB pass band frequency. (50kHz is standard).

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Use ‘VOL. down (or ‘VOL. up) to select between first order analog
DSD Low-Pass filter ‘ON’ or ‘OFF’ when the ‘DSD LP FILTER: OFF’
line is active ( OFF is standard).
Confirm the chosen settings by touching the MON.’ button.
If selecting ‘GAIN’ in the DAC setup menu, the following DAC output
level options are available: ‘0dB’ or ‘-6dB’ toggle between the settings
with ‘VOL. down or ‘VOL. up
Confirm the chosen DAC output level by touching the ‘MON.’ button.
The chosen DAC output level is valid for all five digital inputs. (0dB is
standard)
Leave the Zena MENU function, please consult the Zena user
manual for details.
It is always possible to reset possibly changed DAC settings back to
standard, using the Zena MENU function ‘RESTORE SETTINGS’,
please consult the Zena user manual for details.
PLEASE NOTE: ‘RESTORE SETTING’ will also reset all other Zena
settings too, incl. ‘INPUT NAMING’ and ‘INPUT LEVEL MATCH’!

20
Zena DAC module connections:
INPUT 6: USB
Connect your PC, Mac or streamer via your preferred dedicated USB
Audio cable. Please see separate PC/Mac player information and
guide on: www.gryphon-audio.com.
Accepted USB formats and sample rates:
PCM (Pulse Code Modulated): Fs: 44.1Khz, 48Khz, 88.2Khz, 96Khz
176.4Khz, 192Khz, 352.8Khz or 384Khz
DSD (Direct-Stream Digital):
- Mac: DSD64 and DSD128
- Windows: DSD64, DSD128, DSD256 and DSD512
NO Drivers needed for Mac OSX 10.6+ and Linux with UAC2
compliant kernel.
Zena DAC Kernel-Streaming/ ASIO drivers for MS OS XP to Win10
32-64bit, can be downloaded at: www.gryphon-audio.com
INPUT 7: AES/EBU
Connect a digital source with balanced 110 Ohm output to this XLR
input.
INPUT 8-9: S/PDIF
Connect digital sources with single-ended 75 Ohm output to these
inputs.
INPUT 10: TOSLINK
Connect digital sources with optical output to this input.