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ENVY
Headphone Tube Power Amplifier
TUBES INSTALLATION
PRODUCT GUIDE
2
3
1
4
PANEL DESCRIPTION
OUTPUT 1 OUTPUT 2
3 4
FRONT PANEL BACK PANEL
1. STANDBY touch switch
2. LED indicator
3. XLR headphones output
4. 6.3 mm headphones output
5. Volume control
6. Gain selector
7. Source selector
~50-60Hz FUSE 2.5A T
230V
SUPPLY
VOLTAGE
~60Hz FU SE 1.6A T
120V
1
1
2
5
GAIN
6 7
LO/MID/HI
1. AC power connection, fuse socket, main power switch
2. RCA input sockets (IN1, IN2)
3. XLR (balanced) input (IN3)
4. RCA pre-amp output
5. XLR pre-amp output
6. XLR/RCA output selector (pre-amp)
INPUT 1
INPUT 2
2
2
3
3 5
INPUT 3
LEFT
RIGHT
PREAMP OUTPUT RCA
LEFT RIGHTLEFT RIGHT LEFT RIGHT
4
5
6
PREAMP OUTPUT XLR
LEFT
XLR
CAUT IO N! H OT PAR TS. DO NOT TO UC H! B UR NE D
FINGERS WHEN HANDLING THE PARTS. WAIT 15 MIN
AFTER SWITCHING OFF BEFORE HANDLING PARTS.
INPUT
IN1/IN2/IN3
HANDMADE IN POLAND BY FELIKS-AUDIO
WARNING - TO REDUCE RISK OF FIRE OR ELECTRICAL SHOCK, DO NOT EXPOSE THIS
RCA
RIGHT
CAUTION
EQUIPMENT TO RAIN OR MOISTURE. DO NOT REMOVE COVER NO USER SERVICABLE
PARTS INSIDE, REFER SERVICING TO QUALIFIED PERSONEL. HOT SURFACES, KEEP
COMBUSTIBLE MATERIALS AWAY FROM TUBES, DO NOT BLOCK AIRFLOW
GENERAL SAFETY INSTRUCTION - READ BEFORE FIRST USE!
The amplifier should be plugged to power socket with ground connection. Please note that
tubes can reach operational temperature with exceeding 150 Celsius(300 F) therefore tube
exchange should be done with the device unplugged from AC power, after allowing the tubes
toer supply from the mains. Remove the damaged tube after cooldown of the device (min. 15
minutes).
Due to natural heat emission by tubes, the amplifier is not recommended for continuous use
for more than 8 hours. After that time it is advisable to turn off and cool down the device for
minimum time of 1 hour. Protect the power cord from being walked on, pinched or
overheated (e.g. by the tubes). When replacing the 300B tubes, make sure that the 300B tube
is never in a horizontal position as it cools down. In some designs, due to a specific internal
elements orientation, this can lead to irreversible internal damage to the tube. Always keep
the hot tubes in a vertical position.
DEVICE VENTILATION
Proper ventilation provides long lifetime of the amplifier. Upper and lower cover are
equipped with ventilation holes which guarantee a free airflow. Bottom ventialation holes
provide cool air into the device case, which flows through it and escapes at the top cover. Do
not obstruct the airflow around the amplifier. Allow at least 30cm(12 inches) free space
above the tubes and 10cm (4 inches) for the rear and sides. Do not place the device on any
other heat source. All ventilation openings should remain uncovered during operation of the
amplifier.
WARRANTY
The amplifier wa s m anufactu red an d test ed to the highest qu ality standard s.
The warranty covers defects in material or workmanship for 36 months (tubes for 6
months), from date of purchase. Our limited warranty is void if the product is returned with
tampered labels, any alternations or in case of improper use. To request warranty service,
please provide sales receipt / document of purchase and description of the problem. Product
shipping is at buyer's expense.
INSTALLATION AND BREAK-IN PERIOD
Before turning the amplifier on for the first time, please install the tubes in the sockets, as
described on the illustration. Take care while installing the tubes, ensure the pins fit
appropriate holes in the socket. New amplifier requires a break-in period which takes place
during normal use of the device. Please note that the optimal sound quality will be reached
after approximately 50 hours of operation. In day to day use, tubes reach their operational
temperature after 15 minutes from powering on the device. All tubes must be installed
before turning on the amplifier. Never place the unit in an unstable location. A device may
fall, causing serious personal injury or death. Only use furniture that can safely support the
device. Ensure that the amplifier is not overheating the edge of the supporting furniture. Do
not place the device on tall furniture without anchoring the furniture. Do not place the
amplifier on cloth or other materials that may be located between the unit and supporting
furniture. Keep away the device from the reach of children.
ABOUT FELIKS-AUDIO
Feliks Audio is a boutique manufacturer of hand-crafted tube amplifiers, with over
20 years of audio solutions development experience. All our products are in-house
engineered, tuned and assembled at our site in Lubliniec (Poland). We create special and
unique designs, blending together technology and tradition. Our amplifiers, among them
Echo, Espressivo, Elise and Euforia, have won many supporters across the world.
Our products offer a perfect blend of passion for honest sound, great attention to technical
details and beautiful finish. We do follow design simplicity, minimizing the number of
elements in projected signal path. Thanks to this approach we ensure that the sound
produced by our devices is pure and true.
ENVY HEADPHONE AMPLIFIER
The Envy amplifier is a Single Ended class A headphone tube amplifier, built around the
famous 300B tubes, with transformer coupled output, designed to handle any kind of planar
magnetic or dynamic headphones with the impedance range between 16 to 600 Ohm.
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The amplifier is built on a solid metal chassis and finished with a natural high quality oiled
wood. On the front panel present are headphone outputs: balanced in XLR format and
unbalanced in 6.3mm format. Other selectors include: touch sensitive stand-by button,
volume control knob, impedance selector and audio source selector.
The audio source selectors allows choices of one of the three options: unbalanced RCA
source (IN1 or IN2) and balanced XLR (IN3, left and right channels).
The touch sensitive stand-by button has a LED indicator. For a full "power off" of the
amplifier please use the physical switch on the rear panel of the amplifier, near the AC
connector.
Envy can work as pre-amplifier with a high level of maximum output (up to 10V RMS). On the
rear panel there is a pair of RCA pre-amplifier outputs as well as two XLR connectors for
balanced pre-amplifier output. Output voltage level is regulated with the volume knob.
GAIN SELECTION
Envy supports all ranges of planar magnetic and dynamic headphones, using the GAIN
selector on the front panel for the best match. There are 3 settings, that regulate the output
gain (i.e. limiting the maximum output voltage):
1) Low (gain)- recommended for dynamic headphones with impedance from 16 to 60Ohm
2) Mid (gain)- recommended for headphones with impedance from 60 to 300 Ohm, including
most planar magnetic headphones
3) Hi (gain)- recommended for demanding planar magnetic headphones and dynamic
headphones with impedance from 300 to 600 Ohm
Selecting impedance/gain range to "Mid", stereo speakers (with a recommended sensitivity
>94 db) can be connected to the 6.3mm headphone output and driven with approx. 5 Watt of
output power.
When adjusting the gain (Gain knob) - make sure to always adjust its level (Low, Mid, High) to
the headphones used. To avoid damaging the headphones, we suggest adjusting the Gain at
the minimum volume of the amplifier.
ELECTRICAL DESIGN
The amplifier is made using "point to point" technology. All wired connections are custom
made from single crystal copper (UPOCC – in case of Performance edition) with a teflon
isolation. On the input there is Alps Rk27 potentiometer, followed by two-stage pre-amplifier
with CV-181 tubes and hi-end coupling capacitors. Power tubes are the directly heated 300B
tubes. Output transformers as well as mains transformer are custom made hi-end audio
units.
The amplifier has fully automatic bias and its electrical circuit is a "zero feedback" design.
The power tubes are heated with direct current (DC) with a special circuit designed to
separate the tubes heating from audio path powering. Power supply for anode voltages is
designed on semiconductor and based on MOSFET transistors and low-noise current
sources.
On the XLR balanced inputs, symmetrical audio grade Lundahl transformers have been
used. Audio sources selection is made using high end relays (low signal relays), which are
placed directly behind the input connectors, in order to limit interference and noise.
TECHNICAL SPECIFICATION
§ Power tubes: 300B
§ Driver tubes: CV-181 (6SN7)
§ 2x unbalanced RCA inputs (IN1, In2)
§ 1x balanced XLR input (In3)
§ Input sensitivity 1V RMS
Input impedance:
§ For IN1 i IN2 (RCA) 100kΩ
§ For IN3 (XLR) 10kΩ
1x pair of pre-amplifier output as RCA
1x pair of pre-amplifier output as XLR
Maximum voltage on the above outputs is 5V (RMS) at output impedance of 600Ω and
THD<0,5%
Amplifier’s impedance at various settings of Imedance/Gain:
§ LO at 32Ω load is 3,8Ω
§ MID at 100Ω load is 8,8Ω
§ HI at 600Ω is 20Ω
§ Output powered measured at MID impedance setting at load of 16Ω is 5W with THD ⩽1%
(maximum 8W at THD >5%
Frequency response:
§ 8Hz÷100kHz ±3dB
§ 18Hz÷40kHz ±1dB
Headphone outputs: 6.3mm and XLR
AC voltage 50/60Hz:
§ 230V version (±5%)
§ 115V version (±5%)
Power consumption: 110VA
Weight: 15.1 kg (without packaging)
Dimensions:
§ 35x33x18,5cm (LxWxH) – without tubes
§ 35x33x24,5cm (LxWxH) – with tubes
TUBES - ALTERNATIVES
The following tubes can be safely used in Envy as alternative to originally provided tubes
(always replace the tubes in pairs):
§ Power tubes: other variants of 300B
§ Driver tubes: 6SN7, CV-181
GENERAL SAFETY INSTRUCTIONS
§ This device is not intended for continuous use for more than 8 hours. After that time the
product should be turned off to cool down for the minimum time of 1 hour.
§ Protect the power cord from being walked, pinched or overheated (eg. by the tubes).
§ The use of tubes other than those specified in the "LAMPS" section is prohibited and may
result in danger and damage to the device.
§ Unplug this device during lightning storms or when unused for long periods of time.
§ Prevention of hearing loss
§ Permanent hearing loss may occur if headphones or
earphones are used at high volume for prolonged period of
time
§ Note: To prevent possible hearing damage, do not listen at
high volume levels for long periods
WARNING
§ Before putting on headphones, lower set the volume to a
comfortable listening level
Feliks Audio declares that this device complies with the
essential requirements and other relevant provisions of the
Low Voltage Directive LVD - 2014/35 / EU
SUPPORT
We wish you many happy hours enjoying your new tube amplifier. Should you have any
inquiries please contact us directly at [email protected] or contact your local dealer.
Manufacturer: Feliks Audio Sp. z o.o., 42-700 Lubliniec, 12 Klonowa street
WARRANTY CARD
This is your warranty card. Make sure your seller has completed all of the
fields below. In the case of a warranty service, include a copy of your
purchase with this card. Please also include a description of the fault with
the card.
Warranty start date
Product name Serial number
Seller Signature
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