Carot One FABRIZIOLO 30K User manual

FABRIZIOLO 30K, LIMITED EDITION,
AUDIOPHILE TUBE PREAMPLIFIER
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Table of Contents
1. INTRODUCTION 3
2. FEATURES. 3
3. OVERVIEW. 7
3.1 Connection
3.2 Operation
4. SPECIFICATIONS 10
4.1 Specification of the HeadphoneAmplifier Unit
4.2 Specification of the Pre Amplifier Unit
4.3 Specification of the AC Adaptor
5. TECHNICAL NOTES
(For professional user ONLY) 12
5.1 DC Bias Voltage Tuning
6. TROUBLESHOOTING 14
7. ACCESSORIES 15
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1. Introduction
Thank you for your purchase of Carot One FABRIZIOLO 30K Limited Tube
Preamplifier.
Carot One introduced the mini-size audiophile stereo preamplifier
FABRIZIOLO a few years ago. Thanks for its popularity, we decided to further
improve the circuitry and upgrade most components to build our Limited
Edition, the FABRIZIOLO 30K. As a successor, FABRIZIOLO 30k retains all
the benefits of FABRIZOLO, but further improve the circuitry to provide crystal
clear audio that is comparable to most High End Audio equipment in the
market. A newly designed mini chassis make FABRIZOLO 30K a more
professional looking but yet a more space friendly equipment at a very
affordable price.
2. Features
Tube pre-amplification provides high clarity in reproducing high and
recording music.
Rigid and compact aluminum chassis to ensure a quick and smooth
release of vibrations.
Separated preamplifier and AC adaptor design to minimize mutual
interference and flexible to apply other power source, e.g. lead-acid
battery.
Standard audio sockets compatible with most audiophile quality cables.
Gold-plated RCAfor better looking and sound quality.
Audiophile-graded parts and components
The stylish & specially-plated aluminum case provides not only
good-looking, and also provides outstanding shielding capability.
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Safety Guidelines
Important safety instructions
This product is designed and manufactured to meet strict quality and safety
standards. However, you should be aware of the following installation and
operation precautions.
1. Take heed of warnings and instructions
You should read all the safety and operating instructions before operating this
equipment. Retain this handbook for future reference and adhere to all
warnings in the handbook or on the equipment.
2. Water and moisture
The presence of electricity near water can be dangerous.
Do not uses the equipment near water, for example next to a bathtub,
washbowl, kitchen sink, in a wet basement or near a swimming pool, etc.
3. Object or liquid entry
Take care that objects do not fall and liquids are not spilled into the enclosure
through any openings. Liquid filled objects such as vases should not be placed
on the equipment.
4. Placing the equipment
Only use a rack or shelf that is stable and strong enough to support the weight
of this equipment.
5. Ventilation
Do not place the equipment on a bed, sofa, rug or similar soft surface, or in an
enclosed bookcase or cabinet, since ventilation may be impeded. We
recommend a minimum distance of 50mm around the sides and top of the
equipment to provide adequate ventilation.
6. Heat
Locate the equipment away from naked flames or heat producing appliances
such as radiators, stoves or other appliances that produce heat.
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7. Climate
The equipment has been designed for use in moderate climates and in
domestic situations.
8. Cleaning
Unplug the unit from the mains supply before cleaning.
The case should normally only require a wipe with a soft, lint-free cloth. Do not
use chemical solvents for cleaning.
We do not advise the use of furniture cleaning sprays or polishes as they can
cause indelible white marks.
9. Power sources
Only connect the equipment to a power supply of the type described in the
operating instructions or as marked on the equipment.
The primary method of isolating FABRIZOLO 30K from the mains supply is to
use the switch on the rear of the unit. FABRIZOLO 30K must be installed in a
manner that makes disconnection possible.
10. 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. Pay particular attention to
the point where they exit from the equipment.
11. Power lines
Locate any outdoor antenna/aerial away from power lines.
12. Non-use periods
If the equipment is not being used for an extended period, we recommend that
you unplug the power cord of the equipment from the outlet, to save power.
13. Abnormal smell
If an abnormal smell or smoke is detected from the equipment, turn the power
off immediately and unplug the equipment from the wall outlet. Contact your
dealer and do not reconnect the equipment.
14. Servicing
You should not attempt to service the equipment.
Contact your dealer to arrange servicing.
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15. Damage requiring service
The equipment should be serviced by qualified service personnel when:
A. the power-supply cord or the plug has been damaged, or
B. objects have fallen, or liquid has spilled into the equipment, or
C. the equipment has been exposed to rain, or
D. the equipment does not appear to operate normally or exhibits a marked
change in performance, or
E. the equipment has been dropped or the enclosure damaged.
Safety compliance
This equipment has been designed to meet the EOCENE 60065 international
electrical safety standards.
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and
(2) This device must accept any interference received, including interference
that may cause undesired operation.
WARNING:
Due to the mains power supply being located on the rear panel, the apparatus
must be located in an open area without anything obstructing access to the
mains switch.
Mains plug/appliance coupler is used to disconnect device and it shall remain
readily operable.
Correct disposal of this product
This marking indicates that this product should not be disposed with other
household waste throughout the EU.
To prevent possible harm to the environment or human health from
uncontrolled waste disposal and to conserve material resources, this product
should be recycled responsibly.
To dispose of your product, please use your local return and collection systems
or contact the retailer where the product was purchased.
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3. Overview
1. Volume Controller and Power On/Off
2. 3.5mm Headphone socket
3. 3.5mm AUX input socket. Connect your Smartphone to the amplifier
using the provided mini-RCAcable (this input over-rides rear input)
WARNING:
When plug in the supplied mini jack cable or your headphone to (2) or (3),
always plug in a vertical way. NEVER shake the mini jack as this will
permanently damage the internal structure of the socket causing bad
contact of signal.
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4. Power supply Socket; Plug the bundled AC Adaptor to this socket to
supply power to this amplifier.
5. Audio output. Connect this output to your power amplifier
6. Audio input. The audio signal input (LEFT/RIGHT) connects from
audio source (e.g. CD player) to the amplifier by a RCA audio cable
(not provided).
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3.1 Connection
Carot-One FABRIZIOLO 30k is easy to use product. Simply follow below
steps, you can enjoy the high quality music in a second:
-Connect your CD player or other audio source to the “Line in” RCA socket
(6) using normal RCAaudio cable (not included).
-You can also connect your Smartphone to the 3.5mm AUX input socket (3)
using a mini jack cable (included). Once this input is used, it will over-ride
the rear RCAinput (6)
-You can connect your headphone to the headphone socket (2). Once this
output is used, it will over-ride the rear “Line Out” RCA socket (5)
-If you are using external amplifier, connect a RCAcable from the rear “Line
Out” RCA socket (5) to your amplifier
-Connect the power adaptor to the “Power In” connector (4).
It’s now all set and you are ready to enjoy your music.
3.2 Operation
Please follow the below steps such that you can enjoy the product without any
difficulty:
To Turn on the unit
-Turn the Volume controller (1) clockwise to turn on the amplifier but keep at
minimum level. Wait around 15 seconds to allow the vacuum tube to
warm up to its operation temperature.
-Turn on your external amplifier.
-Play your source equipment and you can hear music from your headphone
or your loudspeakers connected to the external amplifier. Now, your can
control the volume using volume control (1)
To Turn off the unit
-Turn the Volume controller (1) counter-clockwise to minimum level
-Turn off your external amplifier
-Now, turn the volume control (1) fully counter-clockwise to turn off the
FABRIZIOLO 30K.
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4. Specifications
4.1 Specification of the HeadphoneAmplifier Unit
Signal-to-Noise Ratio (SNR) 92dB
Power Output 600mW / channel on 32 Ohm headphone
Frequency response 15Hz – 100kHz -1dB
Input Impedance 10k Ohms
Input Audio CD in RCA (L/R) x 1 [3Vpp max.]
4.2 Specification of the Pre Amplifier Unit
Vacuum Tube 6DJ8/6922 series or 12AU7 series
(exchangeable)
Signal-to-Noise Ratio (SNR) 92dB
THD+Noise 0.05% @10kOhm 0.15%@33Ohm
Input Audio CD in RCA (L/R) x 1 [3Vpp max.]
3.5mm (L/R) x 1
Output Audio Front 3.5mm (L/R) x 1
Rear RCA (L/R) x 1
Power Indicator Blue LED under tube socket x 1
Power Supply DC 12V-13.2V (max)
Dimensions (W x H x D) 76mm x 75mm x 136mm
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4.3 Specification of the AC Adaptor
AC Input Universal AC 100V-240V/50-60Hz
DC Output DC 12V 5A(60W)
DC Plug DC 2.1mm
Ripple & Noise <= 25mV
Over-load Protection 105%-150%
Over-voltage Protection 115%-150%
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5. Technical Notes (for professional user only)
Carot One has already pre-set the jumpers and fine-tuned the DC bias voltage
of each ERNESTOLO 50K with the packaged vacuum tube before shipping.
However, changing different tubes to taste for different sound is the great fun
for many audiophiles and also a great feature of ERNESTOLO 50K.
There are some important notes should be aware before changing tubes.
ERNESTOLO 50K supports two major tube series:
(1) 6DJ8, 6922, 6N11, 6H23n, ECC88, E88CC, etc.. and
(2) 12AU7, 5963, 5814, ECC82, etc..
If you change the tube within the same series, it needs to re-tune the DC bias
voltages ONLY.
If you change the tube to another series, it needs both to re-tune the DC bias
voltages and re-set the jumper. Otherwise, the tube may be burnt out.
The power amplifier jumper setting for Different Tube Series:
The two series of tube are operated in either 6Volt or 12 Volt. Thus, before
changing to a new series of tube, please make sure to set the jumper (P2) to
the appropriate voltage supply (6V or 12V). After setting the jumper voltage,
you can go to section 5.1 to do the bias tuning.
(Remember to power OFF the unit before doing any setting)
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5.1 DC Bias Voltage Tuning
Since each tube might derivate a bit in parameters, especially from different
series, it needs to re-tune the DC bias voltages to guarantee the machine is
working in the best point and performing the best sound quality.
There are two blue precise adjustable potentiometers (RP1, RP2) for tuning
the DC bias voltage of each channel. The DC bias has been tuned tin factory.
But after run-in for a period of time or changed another tube, it would be
deviated that the fine-tuning is needed.
Before you tune these, you need a screwdriver (take off the case), a small
screwdriver (Turn the screw of the potentiometer) and a (digital) multi-meter to
detect the DC bias voltage:
1. Remove the crystal block to access the tube. Slowly shake the vacuum
tube back and forth to remove the vacuum tube. Plug in your preferred
vacuum tube and select the voltage at the jumper (P2)
2. Use screwdriver to take out the 4 screws at the bottom of the unit and
remove the base plate.
3. Power ON the machine with no audio signal input.
4. Wait at least 5 minutes for the machine to run in.
5. Use the multi-meter to detect the DC voltage between the test point (L),
next to RP1, in the PCB & the GND (e.g. the ring of the power switch or
the outer ring of the RCAsockets) of the LEFT channel.
6. Turn the screw on the top of the RP1 potentiometer by a small
screwdriver clockwise or anticlockwise until the voltage as close as to
+6~+8V.
7. Then repeat step 5 and 6 for the RIGHT channel by changing the test
point to (R), next to RP2, and turning the screw on the top of the RP2
potentiometer.
8. Power OFF the amplifier.
9. Cover back the base plate and tighten the screws.
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6 Troubleshooting
If your machine is out of order, it may not be very serious. Before you call your
local distributor or us to repair, you are suggested to check the following:
SYMPTOM POSSIBLE CAUSE REMEDY
cannot power ON
indicator not bright power cords not properly connected properly connect the power cords
no sound at all The audio cable not
properly connected properly connect the audio cable
The mute switch (4) is not
at mute position Un-mute the amplifier
The volume level is too
low Turn volume level higher
The audio source not
started playing Start playing the audio source
the speaker cables not
properly connected properly connect the speaker cables
Hum audio connector plug not
fully pushed in Insert plug securely
Tube not fully pushed in Insert the tube securely
sound out(s) loose connection check input and output
connections.
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7. Accessories
. 3.5MM to 2 x RCA connection cable x 1
. Power cable x 1
. 12V power supply x 1
. User Guide x 1
OPENITEM ITALIA is WORLDWIDE DISTRIBUTOR of Carot One
Website: www.carotone.it
Email: [email protected] - END -
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