Black Ice Audio Fusion F35 User manual

Owner's Manual
Black Ice Audio Fusion F35
Integrated Stereo Tube Amplifier
With the Jim Fosgate Odyssey Circuit
Black Ice Audio
21310 Ridgecroft Drive, Brookeville Maryland 20833
Phone [phone] Fax [phone]
Website: www.blackiceaudio.net

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Dear Customer:
We want to take this opportunity to thank you for purchasing the Black Ice Audio Fusion F35
Integrated Stereo Tube Amplifier. The unit comes with either EL34 or 6550 power tubes depending on
what was ordered. The company that stands behind your amplifier draws on two decades of tube
design and manufacturing experience. In addition to our engineering knowledge, Black Ice Audio is
committed to provide its customers with the highest level of quality sound at an affordable price. Black
Ice Audio has achieved this goal through modern design, quality parts, expert craftsmanship and strict
attention to efficient purchasing and production. We are confident that your amplifier will provide you
with years of listening pleasure.
Before using this unit, please take the time to carefully read and understand the safety instructions
and operating procedures before you install or attempt to operate your Fusion F35 integrated
amplifier. Becoming familiar with important facts about your amplifier and its correct operation will
help assure safe usage, maximum musical satisfaction, and reliable operation. Take special care to
follow the warnings indicated on the unit itself as well as the safety suggestions found in the owner's
manual. Be sure to read the section on tube layout which gives information on tube replacement and
biasing. The effort you invest now will be well rewarded as time goes by.
Sincerely
Black Ice Audio, Inc.
Table of Contents
Section Page No.
Safety Precautions 3, 4
Getting Started
The Back Story 5
About Your F35 5
Construction and Testing 5
Packaging/Unpacking 6
Accessories 6
Preparation for Use 6
Operating Procedures 7
Controls and Their Functions, Remote Control 7, 8
Connections 9
Vacuum Tube Layout: 10
Tube Replacement 10,11
Biasing 11, 12, 13
Servicing 13
Warranty and Conditions 14
Technical Specifications 15
Important
Please Check your unit's rear panel and record in the space below:
Model Number: Fusion F35
Serial Number:
Please fill out the warranty card enclosed with this package. If the warranty card is
not sent in, the warranty time will be reduced to one year. Keep your owner's manual
and receipt in a safe place for future reference.

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SAFETY PRECAUTIONS
IMPORTANT SAFEGUARDS
PLEASE READ CAREFULLY ALL THE FOLLOWING IMPORTANT
SAFEGUARDS THAT ARE APPLICABLE TO YOUR EQUIPMENT.
_________________________________________________________________________
_________________________________________________________________________
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SAFETY
1) Read the Safety Instructions in the Owner's
Manual - All the safety and operating instructions
should be read before the product is operated.
2) Retain the Owner's Manual - The safety and
operating instructions should be retained for future
reference.
3) Heed Warnings - All warnings on the product
and its operations should be adhered to.
4) Follow Instructions - All operating and use
instructions should be followed.
5) Power Sources - This product should be
operated using only the type of power source
indicated on the marking label. If you are not sure
of the type of power supply to your home, consult
your product dealer or local power company.
6) Grounding - This product is equipped with a
three prong plug. Always use an electrical outlet
that is grounded. If you do not know whether the
outlet is grounded, consult your electrician or local
power company.
7) Power Cord Protection - Power supply cords
should be routed so that they are not likely to be
walked on or pinched by items placed upon or
against them, paying particular attention to cords at
plugs, convenience receptacles and where they exit
from the product.
8) Fuses - For continued protection against fire
hazard, replace fuses with the same type and rating
of the fuses specified. When changing fuses,
completely remove the AC cord from the amplifier.
9) Tubes During Operation - While operating your
amplifier, do not touch the glowing tubes since this
may result in a severe burn.
10) Overloading - Do not overload wall outlets,
extension cords or integral convenience receptacles
to avoid the risk of a fire or an electric shock.
11) Lightning - For added protection for this
product during a lightning storm or when it is left
unattended and unused for long periods of time,
unplug it from the wall outlet.
SAFETY PRECAUTIONS CONTINUED
CAUTION: TO REDUCE THE RISK OF ELECTRIC
SHOCK, DO NOT REMOVE SCREWS.
NO USER-SERVICEABLE PARTS
INSIDE.
REFER SERVICING TO QUALIFIED
SERVICE PERSONNEL.
CAUTION
RISK OF ELECTRIC
SHOCK
DO NOT OPEN
The lightning flash with arrowhead symbol, within
an equilateral triangle, is intended to alert the user
to the presence of uninsulated “dangerous voltage”
within the product’s enclosure that may be of suffi-
cient magnitude to constitute a risk of electric shock
to persons.
The exclamation point within an equilateral triangle
is intended to alert the user to the presence of
important operating and maintenance (servicing)
instructions in the literature accompanying the ap-
pliance.

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INSTALLATION
ENVIRONMENT
1) Water and Moisture - Do not use this product
near water - i.e. near a bathtub, wash bowl, kitchen
sink or laundry tub; in a wet basement; or near a
swimming pool or the like. Damp basements
should be avoided.
2) Heat - The product should be situated away from
heat sources such as radiators, heat registers,
stoves or other appliances that produce heat. Also
avoid putting the unit in the direct rays of the sun.
3. For indoor use only.
PLACEMENT
1) Ventilation - This product should not be placed
in a built-in installation or rack unless proper
ventilation is provided or the manufacturer's
instructions have been followed. Never place
anything on top your amplifier that could obstruct
the airflow and cause the electron tubes to overheat
and damage the amplifier. Do not place your
amplifier in a closed bookcase; overheating could
result.
2) Foreign Material - Care should be taken to
prevent objects from falling into and liquids from
spilling into the unit. Do not subject this unit to
excessive smoke, dust, mechanical vibration, or
shock.
3) Surface - Place the unit on a flat level surface.
4) Accessories - Do not place this product on an
unstable cart, stand, tripod, bracket or table. The
product may fall causing serious injury to a child or
adult and serious damage to the product. Use only
with carts, stands, brackets or tables recommended
by the manufacturer or sold with the product. Any
mounting of the product should follow the
manufacturer's instructions and should use a
mounting accessory recommended by the
manufacturer.
5) Carts - A product and
cart combination should
be moved with care. Quick
stops, excessive force and
uneven surfaces may
cause the product and
the cart combination to
overturn.
6) Wall or Ceiling Mounting - The product should
be mounted to a wall or ceiling only as recommend
by the manufacturer
MAINTENANCE
Cleaning - Unplug this product from the wall outlet
before cleaning. Do not use liquid cleaners or
aerosol cleaners. Use a damp cloth for cleaning.
Do not use any type of abrasive pad, scouring
powder or solvent such as alcohol or benzene.
SERVICE
1) Object and Liquid Entry - Never push anything
through the openings of this product which could
touch dangerous voltage or other hazards. Refer
all servicing to qualified service personnel.
2) Damage Requiring Service - Unplug this
product from the wall outlet and refer servicing to
qualified service personnel under the following
conditions:
a) When the power-supply cord or plug is
damaged.
b) If liquid has been spilled or objects have
fallen in the product.
c) If the product has been exposed to rain
or water.
d) If the product does not operate normally
when following the operating instructions,
adjust only those controls that are covered
by these instructions. Improper adjustment
of other controls may result in damage that
will often require extensive work by a
qualified technician to restore the product to
its normal operation.
e) If the product has been dropped or
damaged in any way.
f) When the product exhibits a distinct
change in performance - this indicates the
need for servicing.
g) When the unit needs broken tubes to be
replaced.
3) Replacement Parts - When replacement parts
are required, be sure the service technician uses
replacement parts specified by the manufacturer or
parts with the same characteristics as the original
part. Unauthorized substitutions may result in fire,
electric shock or other hazards.
4) Tube Replacement - Should it become
necessary to replace your tubes, carefully follow the
instructions in your Owner's Manual. When
replacing your tubes, remove the AC power plug
from the wall and allow thirty minutes for the high
voltage capacitors to discharge.
Getting Started

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The Back Story: Suffice to say that Jim Fosgate (nicknamed “Foz”) is a World-Class Engineer and is the
vision and expertise behind the Fusion F35. His repertoire of achievement spans every category of audio
electronic devices from two channel audio, car audio, surround sound, headphone amplifiers to digital audio
equipment. If one wants to experience a “live experience of audio”, Foz’s sound room epitomizes the fusion
of his designs in preamplifiers, amplifiers, source devices, cables and speakers. His proficiency is not a
matter of a blind squirrel finding an acorn. It is based on decades of document research and
experimentation of every possible major circuit approach, followed up by Foz building and auditioning the
circuits himself. Many people have asked us about the model number Fusion F35 which is rather like a
fighter jet designation. The F in the model number represents an abbreviation for Foz, and 35 denotes the
new replacement for the Fusion 3502, JD 302 and the JD 502 which have been in the Black Ice Audio/Jolida
Inc. product lineup for over 25 years.
Another aspect of Foz’s expertise is manufacturing acumen. His designs reflect that somebody has to make
the stuff and complications are not the friend of manufacturers. Foz’s circuits are second to none in terms of
sound reproduction, but when the added dimension of creating a unit that uses accessible parts, ease of
assembly and cost effectiveness, World-Class Engineer is not a complement, it is an identification of fact.
About Your Fusion F35
Before working on the design of the F35, we asked a simple question, “What do listeners want”. Many
listeners in general want speakers to disappear with a natural organic three dimensional sound, tight clear
bass, extended highs without glare and a rich full midrange. Out of that objective came a circuit design we
call the Odyssey. Essentially the Odyssey is a dual phase V drive circuit. The underlying basis is a fully
balanced differential push pull circuit.
Black Ice Audio’s Fusion F35 Integrated Stereo Vacuum Tube Amplifier is an example of state-of-the-art
vacuum-tube technology as it exists today. This unit contains the Jim Fosgate newly designed Odyssey
circuit. This product was designed to provide: 1) an integrated amplifier that would deliver musical accuracy
2) a significant value based on a high performance to price ratio 3) a vacuum tube unit that would exceed the
reliability of solid state units. Parts quality is the best currently available, and the overall circuit layout is
maximized for sonic purity.
The Fusion F35 comes with 4 pieces of EL 34 or 6550 power output tubes, 4 pieces of 12AX7 for the
preamplifier and power drive tubes. With Exact Biasing, one can use either EL 34/6CA7s or 6550s. Please
note that the tube types KT88 through KT150s can be used in place of the 6550s. The Fusion F35 is rated
at 70 watts per channel RMS with the 6550s and 60 watts per channel with EL 34s. Since the Fusion F35
already has a built in pre- amplifier, all that is required to create a sound system is the addition of two
speakers of 4 or 8 ohms and a source.
Another change is one of cosmetics. The F35 has glass integrated into the cosmetic design at the front panel
and the transformer cover. Controls except for the volume control are touch activated and of course there is
a remote for your convenience. For biasing, the amp has a simple process Exact Biasing which is adjusting a
screw for each tube that is measured by a built in amperage meter. This is placed conveniently on the top
panel of the amp.
Construction and Testing
Like every Black Ice product, your Fusion F35 has been carefully hand-crafted, using precision mechanical
parts. Electronic components and assembly procedures are similar to those used in the manufacture of
scientific equipment and musical instruments. To assure consistent performance, each F35 is visually
inspected at several assembly points, tested, and electronically profiled prior to shipment.
This time-consuming perfectionist approach in the design and manufacture of audio equipment is intended to
provide the best in musical satisfaction with lasting value.

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Handling Vacuum Tubes
Many may not have had experience handling vacuum tubes. However, most people have handled
incandescent light bulbs which is very similar to dealing with vacuum tubes. As with light bulbs, you should
not touch a vacuum tube when it is on or you can burn yourself. Similarly, if a tube is dropped on a hard
surface the tube will break. When you replace a tube you should make certain the unit is disconnected from
the AC outlet and that the tube has cooled down. Never force a tube into a socket. You should treat the
tube gently when holding or replacing it. The precautions needed when handling a light bulb will give you a
good guide on how to handle a vacuum tube.
Packaging
Save all the packaging in a dry place. Your Black Ice Audio, Inc. amplifier is a precision electronic instrument
and should be properly packaged any time shipment is made. Because of its weight (55 pounds), it is highly
probable that the unit will be damaged during shipment if repackaged in a box and packing other than that
designed for the unit.
You may have occasion to return the unit to the factory for service or shipment of the unit may be required
for some other situation. Should shipment prove necessary, the original packaging may save your
investment from unnecessary damage, delay and expense.
Unpacking
The Fusion F35 is packed within a custom made impact absorbing foam wrap that holds the amplifier in the
carton. Because of the unit weight and because it is a precision electronic instrument, reasonable care
should be taken when unpacking the unit and preparing it for use.
It is best to unpack a unit in a large open work area with two people on hand. The carton should be set
upright in the center of the work area and a small knife used to carefully slit or lift the taped edges of the
outer carton's top flaps. Fold the flaps to the sides to lift out the inner foam that houses the amplifier. One
person should hold the box while another lifts the amplifier out and places the unit on a flat surface. Very
carefully remove the foam one side at a time while providing support for the amplifier. Now, while your
memory is fresh, reassemble the carton system for future use.
Accessories
1 AC Power Cord
1 Tuning Wand/Bias adjustment screwdriver
1 Gloves
1 Cloth cover
Preparation for Use
1. Place your amplifier on a flat surface.
2. Your Fusion F35 amplifier is shipped with the vacuum tubes in foam protected against vibration. The
tubes can be installed by matching the "V1" on the amplifier with the "V1" on the tube and so on. On the
larger power output tubes, there is a key on the middle plastic. Make sure the pins and key of the tube are
lined up with the holes in the socket and never use excessive force when putting the tube into the socket.If
you remove the tubes and do not put them back in their original sequence, the amplifier should be re-biased.
Note: Contact Enhancers are not recommended for use on vacuum tube contact pins. With continual
exposure to heat and air, these substances can form gummy, dust-collecting residues which actually reduce
contact and degrade sonic performance. Proper external use of contact enhancers -- on interconnect plugs,
speaker connections, etc. -- is subject to the discretion of the owner.

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Operating and Adjustment Procedure
1. Make sure you have read and complied with the CONTROL AND CONNECTION instructions prior to
attempting to operate your unit.
2. Make sure your Fusion F35 is properly connected to a high-current power receptacle via the attached
power cord (see Connections).
3. Attach the audio sources and speakers to the Fusion F35.
4. Before you turn the amplifier on, make sure the speaker connections are properly hooked up. Never run
the amplifier without speakers hooked up since this may damage the transformers. When turning the unit
on, make sure the volume control is at its lowest point.
5. Your Fusion F35 will now operate satisfactorily. However, a full stabilization or warm-up period of at least
5 minutes is recommended for best sonic performance.
The amplifier should always be turned on and off via its own power on-off switch. Further, other discrete
components of an audio system should be turned on first. Otherwise, with some equipment, the amplifier will
reproduce warm-up thumps, etc., some of which could be harmful to your speaker system.
Controls and Their Functions: Front Panel
1. Headphone Jack: 1/4 inch jack for connection to a headphone.
2. Selector Switches: Used to select the audio source to be heard. There are four selection positions that can be
chosen by touching either position I, II, III or IV.
3. Power switch: Please note, that on the rear of the amplifier is a on/off switch that can turn the amplifier totally
off. When the rear switch is on the amplifier will be in standby. Press the Black Ice Audio Logo to turn the
amplifier on. The indicator should start blinking and the meter light will turn on. Within a few seconds, the tubes on
the top panel will begin to glow a soft orange color. After 15 to 20 seconds, the Logo will become a solid and the
amplifier is ready for operation.
It is normal for a vacuum tube power amplifier to run quite "warm", and if used for prolonged periods, "hot" to the
touch. All components are operating at safe, conservative levels and will not be damaged. Do not touch the
tubes during operation or for ten minutes after the unit is turned off, otherwise touching may result in a burn.
Keep children away from the unit. Further, other discrete components of an audio system should be turned on
first. Otherwise, with some equipment, the amplifier will reproduce warm-up thumps, etc, some of which could be
harmful to your speaker system.

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4. Remote Sensor
5. Headphone on/off Switch: To operate headphones, connect the headphone to the amp via the headphone
jack. Touch the headphone selector switch. This action will mute the speakers and the volume of the headphone
can be adjusted via the volume control.
6. Volume control: This control is used to adjust the output volume level. Turning the control knob clockwise
increases the sound level and turning it counter clockwise decreases the sound level.
Note: Black Ice Audio, Inc. does not recommend leaving your Fusion F35 "on" 24 hours a day as is the custom of some
audiophiles to achieve maximum sonic performance on demand. While this is often recommended for solid-state
equipment, Black Ice Audio does not recommend this procedure for vacuum tube amplifiers. Since the tubes in your
amplifier are rated for 3,000 hours of life, you may have to replace the tubes more often if you leave the amplifier on 24
hours a day.
Remote Control:
1. On/Standby
2. Scrolling switch for inputs
3. Volume up/volume down
4. Selection switch for inputs
5. Mute
6. Headphone On/Off

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CONNECTIONS Rear Panel
1. Audio Signal Connection Input Jacks: Use these jacks to connect analog audio signal RCA
interconnects or XLR interconnects from your components to the amplifier. The audio interconnects should be
connected to the proper input output jacks for each unit. Note: Be sure to observe the proper polarity, i.e. the
right channels of the amplifier are connected to the corresponding right channels of the component, etc.
For Inputs marked I and II, you have option of either using XLR or RCA connectors.
For inputs marked III and IV, RCA connectors need to be used.
2. Output Jacks: Use these RCA connections to send an output analog signal.
For Outputs marked REC, the right and left output signal can be used for recording. The output signal is a fixed
signal from the source.
For the output marked SUB, the output signal can be used for a powered subwoofer. The analog signal is a
variable volt output. Please note, that if your subwoofer has the proper connections, you can use your speaker
outputs to run your subwoofer. FYI, many of the high end subwoofers will only connect with the speaker posts.
3. Speaker Terminals: Your amplifier has two output channels, the Right Output and the Left Output. Each
output channel is designed to handle one speaker. Simply connect the "negative" or "-" speaker lead to "0" post
and the "positive" or "+" speaker lead to 4 or 8 ohm post, as required (check the impedance of your speakers
and connect them to the correct ohm post). Make sure that the polarity of the speaker wire is correct, that is the
black, "-", or negative speaker terminal, is wired to the "0" terminal on the Fusion F35 and the red, "+", or
positive speaker terminal is wired to the "4"or "8" ohms. If these wires are reversed (reversed polarity), the
sound will be unnatural and will lack bass (out of phase).
4. Master Power Switch: In the On position the unit will be in standby, if the switch is in the off position, the
unit will be totally shut down.
5. AC Power Connection and Fuse Holder: It is suggested to place the master power on-off switch on
the panel of the Fusion F35 in the "Off" position before connecting the power line cord to AC power. The Fusion
F35 amplifier must be connected to a wall AC power receptacle, or a similar heavy-duty source. Avoid the use of
extension cords. If they must be used, use 14-gauge or heavier cord. The power cord on your Fusion F35 has a
standard three-prong grounding plug to provide maximum safety when it is connected to a ground wall
receptacle. If there is any question regarding the safety of grounding procedures, be certain to seek competent
help with the installation. In the upper half of the IEC is the fuse holder with an extra fuse. When replacing the
fuse, make sure that your Fusion F35 unit is unplugged from the wall. To replace the fuse, pull the cover off as
if you were pulling a tray straight off a table. For 110 - 120 VAC (Household AC current) a 6.3 amp slow-blo fuse
and for 200-240 VAC use a 3.15 amp slow-blo fuse.
IMPORTANT NOTE: Use the best available speaker wires and interconnects between your equipment. Our
experience has been that a set of top quality cables hooked up to speakers and CD players can improve the
sound.

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VACCUM TUBE LAYOUT
Top Panel
This section is dedicated to those who do not have an abundant amount of experience with tube amplifiers. The
above drawing is an illustration of the top panel of your Fusion F35. Your amplifier uses a complement of 8
tubes spread over three vacuum tube types. This tube complement is made up of 4 pieces of 6CA7/EL34s or
6550s and 4 pieces of 12AX7s. Please note that the vacuum tube type KT88 to KT150 can be used in place of
the 6550s. The placement of the tubes in their correct socket is critical. If you need to replace a tube, consult
the tube layout for positioning. The placement of your tubes in your amplifier is:
V1 = 6550/EL34 tube type
V2 = 6550/EL34 tube type
V3 = 6550/EL34 tube type
V4 = 6550/EL34 tube type
V5 = 12AX7 tube type
V6 = 12AX7 tube type
V7 = 12AX7 tube type
V8 = 12AX7 tube type
These tubes are readily available at Specialty Audio stores, guitar amplifier stores in your local area, mail order
houses for guitar and audio equipment as well as internet sites that specialize in vacuum tubes (search Vacuum
Tubes) The majority of professional guitar amplifiers sold are tube driven since the music industry uses the best
sounding amplifiers for professional reasons. The vacuum tubes in your Fusion F35 amplifier are rated for 3,000
hours of life. The average usage of an audio amplifier is 500 hours per year or 10 hours a week so changing
the power output tubes should be every 6 or more years. Our experience is the 12AX7s (smaller front tubes)
should last 6,000 hours. There is no exact method for determining the life of the tube since the life expectation is
a combination of how the tube was built, how it is used, and how long it is operated.
Handling a tube amplifier is not complicated even though most people are used to solid state. Replacing tubes
every six years or more, and taking time to bias the amps are not difficult especially with the Exact Biasing
System. What you get with a tube amplifier is a reliable piece of electronic equipment that can give you years
of service. Many people remember tube equipment in terms of old radios in the 1940s and 1950s. However, in
the past, tube equipment was known for its reliability and, in fact, vacuum tubes currently are still in widespread
use. Radar, microwave ovens, ham radios, guitar amplifiers, cat scanners, X-ray machines, plastic sealing
machines and power radio transmitters, to name a few types of equipment, still use vacuum tube technology.

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However, the real reason to have vacuum tubes in an amplifier is the quality of sound it produces. There has
been a perennial debate over whether solid state amplifiers sound better than vacuum tube amplifiers. To be
sure, solid state proponents also have pointed to the problems of tube amplifiers in terms of hot vacuum tubes
that can burn you or your children and the need to replace the tubes. However, the critics of tube amplifiers
cannot argue against the beauty of sound reproduction. A tube amplifier matched with an appropriate speaker
can produce a magical sound. The hard, brittle and edgy presentation of many solid state amplifiers is in sharp
contrast to the rich, lush liquidity and sound presentation or sound stage of a tube amplifier. The midrange and
treble are smooth and silky with crystal clear sound definition. As for bass, solid state can produce a harder
bass sound; but a good tube amp can still deliver a punch in the lower end. Simply put, have your friends listen
to the sound; of a tube amplifier and they will probably want to know where you purchased it.
Replacing Your Tubes
When you replace the 6550/EL34 vacuum tubes in your unit, you will have to rebias as explained in the next
section. This work can be done by your audio dealer or service repair shop if you do not desire to do it yourself.
When you replace the 12AX7s, you do not have to rebias the amplifier.
1. Should you replace your tubes make certain the amplifier is unplugged from the wall AC receptacle and
make certain the unit has not been operating for at least thirty minutes. This allows the capacitor to discharge
and the tubes to cool down.
2. To remove a vacuum tube, use your thumb, index finger and middle finger to gently grasp the vacuum tube
on all sides. Hold the tube in the same manner as you would hold a incandescent light bulb. To extract the
tube from the socket, gently rock the tube from side to side while pulling up on it until the tube pins have been
freed from the socket. Never use excessive force.
3. When replacing the tubes, make certain that the right part is being placed in the socket, e.g. V1=6550, etc.
4. The El34/6550 socket is keyed with a middle plastic pin on the bottom of the tube. Holding the tube with the
thumb, index finger and middle finger, line up the plastic pin and the metal pins with the socket and gently push
down on the tube until it is seated. For the 12AX7, line the pins with the holes in the socket and push the the
tube down. Never try to force the tube into the socket. If the tube does not go easily into the socket, check to
make certain the pins are lined up and that you are using the right tube.
Biasing
For your Information:
When mentioning you will have to bias your amplifier under certain circumstances, there can be a moment of
panic. On the F35, biasing is a simple matter of using the Exact Biasing system. Essentially it is turning a
potentiometer screw clockwise or counter clockwise and setting it to the right level that is shown in the meter.
Biasing is simply to make certain the tubes are electrically operating in a similar manner, i.e. that the tubes are
pushing out approximately the same amount of electrical power. Biasing is a simple procedure requiring only a
one tool and ten minutes of your time. 1 thru 3 outlines when biasing is needed. They are:
1. When you first receive the amplifier, there is a possibility that the bias may have to be adjusted on the
amplifier. The unit's bias is set at the factory, but there are two major factors, which can cause a change in the
bias setting. First, significant vibration during shipping can affect the tubes or cause minute movements in the
bias trim potentiometers and thus change the bias setting. Secondly, AC voltage levels can vary from one
geographical region to another and thus the AC voltage can be different from the Black Ice Audio testing voltage
of 117 volts which can raise or lower the bias setting.
2. Black Ice Audio recommends to also bias if there is a reduction in the volume due to the natural wear of the
tube over time, or when new electron tubes are installed.
3. In general, after the initial biasing, you do not have to bias the Fusion F35 for six months. There will be
fluctuations in the bias of the amplifier that are due to either the changes in voltage (in some regions of the
country the voltage can vary depending on the time of day or on what type or how much electrical equipment is
operating in a given home) or because the thermal balance of a tube may be such, that the tube after it has
been on for one minute will not have the same bias after it has been operating for five hours.

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4. It is important to note the V1, V2, V3, and V4 bias levels are increased by turning the bias adjustment
screw clockwise and the bias levels are decreased by turning the bias adjustment screw counter-
clockwise.
Before you start. When you use the Exact Biasing system you will need the small screwdriver that came
with your unit.
Biasing Layout
Top panel
Exact Biasing:
A quick and easy method to bias the amplifier, to make certain the tube is at the right bias point or to re-bias.
For this type of biasing only a small plastic handled Tuning wand that comes with your unit is needed..
1. To start the process, turn the unit on with the volume knob turned to zero. No audio source should be
playing at this time.
2. Allow the unit to warm up for at least five minutes.
3. To check your bias, simply turn the bias selector switch to V1, V2, V3 or V4. The meter reading for
EL34s/6CA7s is 40 milliamps plus or minus 4 milliamps. The meter reading for 6550 tubes is 50
milliamps plus or minus 5 milliamps. If the reading falls within those parameters, adjusting the bias is not
necessary. Please note, that if you are reading the meter while music is playing, the reading will fluctuate.
4. To bias the V1 tube, set the Bias Selector switch to V1. Then take the tuning wand, and with the cupped end,
insert it into the V1 hole. Increase the milliamps by turning the screw clockwise and decrease the reading by
turning the screw counter-clockwise. Follow the same pattern to bias the V2, V3 and V4 tube. Please note that if
the meter reading fluctuates while music is playing, this is normal.
5. Rebias the tubes again after the initial first bias pass. The reason is that all the tubes use the same power
supply voltage. Increasing amperage to one tube will reduce the amperage from the other three tubes. In like
manner, decreasing the amperage from one tube will increase the amperage to the other three tubes.

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Please Note, If this is the first time you are biasing the amp, we suggest leaving the amp on for about two hours
to stabilize the tubes. Recheck the bias and bias as needed.
We are often asked why we do not put an automatic biasing system in the unit. Auto-biasing is a well-known
design known by engineers for over 40 years. It is a circuit in which a series of resistors in the core of the bias
design. However, it has a significant negative impact on the performance of the unit. It will reduce power and it
will introduce distortion into the signal path. Exact Biasing will not reduce power, nor will it introduce distortion
since it merely senses the level of current going through the bias path rather than trying to alter and control it.
Although Exact Biasing requires a minimum effort, the dividends of power and sound performance are worth the
investment.
Note: The two most common errors in biasing the Black Ice Audio amplifier are:
1. Turning the bias screws the wrong way.
2. Attempting to "tweak" the bias levels by ear without using the meter on the amplifier which reduces optimum
performance.
Servicing
Because of its careful design and exacting standards of manufacture, your Fusion F35 amplifier should normally
require only minimal service to maintain its high level of performance.
CAUTION: The Fusion F35 amplifier contains sufficient levels of voltage and current to be lethal. Do not tamper
with a component or part inside the unit. Even with the power turned off, a charge remains in the energy storage
capacitors for some time. Refer any needed service to your authorized Black Ice Audio dealer or other qualified
technician.
Questions regarding your amplifier may be referred to the Customer Service Department of Black Ice Audio:
[phone].
We hope you enjoy your musical experience.

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Black Ice Audio
21310 Ridgecroft Drive, Brookeville, MD 20833
[phone]
LIMITED WARRANTY
The Black Ice Audio Fusion F35 Integrated Stereo Tube Amplifiers are warranted for the period
stated from the date of the original purchase.
1. Chassis and Transformers 2 years
2. Electron Tubes 1 year or 1,000 hours whichever
comes first
WHO IS PROTECTED BY THIS WARRANTY
Your Black Ice Audio warranty protects the original owner , so long as the original bill of sale is presented when warranty
service is required. In addition, the warranty card included with you amplifier must be submitted within thirty days of purchase
otherwise the warranty will be good for only 1 year.
WHAT IS COVERED BY THE WARRANTY
Your Black Ice Audio warranty covers all defects in material and workmanship with the following specified exceptions. These
are: (1) Electron tubes are warranted for one year or 1,000 hours which ever comes first; (2) damage caused by accident,
unreasonable use or neglect (including the lack of reasonable and necessary maintenance); (3) modifications to the amplifier;
(4) damage occurring during shipment (claims must be presented to the carrier); (5) damage to or deterioration of any
accessory or decorative wooden surface; (6) damage resulting from failure to follow instructions contained in your owner's
manual; (7) damage resulting from the performance of repairs by someone other than Black Ice Audio or an authorized Black
Ice Audio warranty station; (8) any Black Ice Audio unit on which the serial number has been effaced, modified or removed;
(9) units used as demonstration or display models prior to purchase by the original consumer owner; (10) units used for the
purpose other than home use.
HOW TO OBTAIN WARRANTY PERFORMANCE
If your Black Ice Audio unit ever needs service, write to us at Black Ice Audio Inc., PO Box 218, Brookeville, MD 20833 (Att.
Customer Relations Department). We may direct you to an Authorized Black Ice Audio Warranty Station, or ask you to send
your unit to the factory for repair in which case we'll supply a Service Return Authorization and complete shipping instructions.
Either way, you'll need to present the original bill of sale to establish the date of purchase. Please do not ship your Black Ice
Audio unit to the Maryland address without our prior written authorization.
If service under this warranty is not necessary, but you have questions regarding the installation or operation of your unit,
please write to our Customer Relations department at the address above.
WHO PAYS FOR WHAT
Black Ice Audio will be happy to pay all labor and material expenses for all repairs covered by this warranty. If necessary
repairs are not covered by this warranty, or if a unit is examined which is not in need of repair, you will be charged for the
repairs or examination.
Although you must pay any shipping charges incurred in getting your unit to an authorized warranty station or to the factory,
we will pay return shipping charges if the repairs are covered by the warranty. Please be sure to save the original shipping
cartons because a nominal charge will be made for additional cartons.
LIMITATION ON IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR PARTICULAR PURPOSE ARE
LIMITED IN DURATION TO THE LENGTH OF THIS WARRANTY, UNLESS OTHERWISE PROVIDED BY STATE LAW.
EXCLUSION OF CERTAIN DAMAGES
BLACK ICE AUDIO'S LIABILITY IS LIMITED TO THE REPAIR OR REPLACEMENT AT OUR OPTION, OF ANY DEFECTIVE
PRODUCT AND SHALL IN NO EVENT INCLUDE INCIDENTAL OR CONSEQUENTIAL COMMERCIAL DAMAGES OF ANY
KIND.
SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS AND/OR DO NOT
ALLOW THE EXCLUSION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATIONS AND
EXCLUSIONS MAY NOT APPLY TO YOU.
This warranty gives you specific legal rights and you may also have other rights which vary from state to state. We sincerely
thank you for your expression of confidence in Black Ice Audio products. The amplifiers have been painstakingly assembled
by highly trained crafts' people. It should give you many years of musical enjoyment.

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Fusion F35 Technical Specifications:
Maximum Power Output: 85 W per channel at 8 ohms, 1KHz with 6550 Tubes
75 W per channel at 8 ohms, 1KHz with EL34 Tubes
Rated Output Power: 70 W per channel at 8 ohms, 25Hz to 60KHz with 6550 Tubes
60 W per channel at 8 ohms, 28Hz to 72KHz with EL34 Tubes
Frequency Response: (at 1 watt into 8 ohms) 8Hz to 130KHz + 1dB
Bandwidth: 15Hz to 80KHz + 3dB; 0dB 60 W 1KHz
Distortion THD: Less than 1% at 20 V output, 28Hz to 15KHz
Circuit Type: Fully Balanced differential push pull
Input Impedance: 100Kohms
Input Sensitivity: 1V at 1KHz for 60/70 watt output
Output Impedance: 4 ohms and 8 ohms
Negative Feedback: Less than 4.5 dB
Noise and Hum: 95dB below rated output
Tube Complement: 4 pcs. EL34 or 6550 power output; 4 pcs. 12AX7A/ECC83
Power Requirements: 110V-120 VAC 60Hz 180 watts-standby, 450 watts maximum (220 VAC
50Hz option)
Dimensions: 17 inches (43cm) wide by 15 inches (38cm) deep by 8.5 inches (19 cm)
high
Weight: 49 pounds (22 Kg) net, approximately 60 pounds (27 Kg) packaged
Warranty: Two year limited parts and labor. One year or 1000 hours whichever
comes first on Black Ice Audio Tubes.
Bias Settings: 40 milliamps + 4 mA for EL 34s, 50 milliamps + 5 mA for 6550s
Fuse: 110 - 120 VAC, 6.3 Amp slo Blo; 200 - 240 VAC, 3.15 Amp slo Blo
Size 5mm X 20mm
Construction Details and Features:
o Fully Integrated Stereo Amplifier: Input 1 V driving 60 to 70 watts, maximum 85 watts output.
o Multiple Inputs: Touch control selector switch
o Features: Uses EL34 or 6550 tubes. Fixed and Subwoofer output. Remote control and touch sensor
on/off switch. Tube based headphone output.
o Custom Wound Audio Transformers with a core of German grain oriented silicon steel. The output
transformers are based on the Hafler design.
o Exact Bias System: Top panel bias testing terminal with bias adjustment controls and built in
meter.
o State of the Art Components: ALPS Blue audio potentiometer, gold plated RCA input jacks, Black
Ice Audion coupling caps.
o Low Feedback Design: Only 4.5 dB

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Black Ice Audio/Black Ice Audio
21310 Ridgecroft Drive, Brookeville, MD 20833

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Tel: [phone] Fax: [phone]