Fezz Audio Mira Ceti User manual

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USER`S MANUAL



2
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
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
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 – 2
 – 3
 – 3
 – 3
Unpacking – 3
Content of package – 3
Vacuum tubes installation – 4
Where to place your amplier – 4
Descriptions of the amplier – 4
 – 5
Speaker connections – 5
Source connections – 5
Power cord connections – 5
 – 6
Buring-in process – 6
Vacuum tubes replacement – 6
 – 6
Protective tube cage – 6
Premium tubes set – 7
 – 7

TABLE OF CONTENTS
Type: stereo vacuum tube mono power amplier
Model: Mira Ceti MONO Power amplier, Evolution line
Max output power: 1x15W
Circuit type: PSE Paralell Single Ended
Output impedance: 4Ω/8Ω
Inputs: 1xRCA
Harmonic distortions THD: <0,1%
Frequency response 12Hz-60kHz (-3dB)
Power consumption: 115W
Main AC fuse: 3,15A T
Net weight: 19,5 kg
Dimensions (with tubes): 420x380x220mm
Tubes : 300B x2, 6SN7x2 , automatic bias


3
- Never turn on the amplifeir without installed tubes and without hooked-up spekers.
- Never place the Fezz Audio Mira Ceti MONO power amplier near heat sources, such as radiators, heaters or direct
sunlight. Ensure adequate ventilation and airow
- We also warn against exposure of the amplier to conditions such as very low temperatures and/or high humidity.
- During normal operation, the vacuum tubes radiate signicant amounts of heat - there is a risk of burns.
- The amplier should be plugged directly into a wall socket. If you must use an extension cord, please make sure that it
has load parameters sucient to ensure proper handling of current delivery to the device.
- When cleaning, always disconnect the Titania amplier from the power source. Use a dry, soft cloth. Do not use water or
cleaning agents.
- If your amplier starts to misbehave or to work incorrectly, if it’s temperature gets too high or you start feeling smoke -
immediately disconnect the device from the mains.
- Due to the risk of exposure to high voltages – please do not open the lid of the amplier.
ATTENTION: This warning remains in force also in a situation where the device is already disconnected from the wall outlet.
- Always replace fuses in accordance with the original, intended specication.
- Do not make repairs on your own, or adjustments beyond those as described in this manual. Execution of any
unauthorized repairs or modications of the device result in a loss of warranty.
New Mira Ceti 300b mono power amplier A-class is based on legendary direct heated triode 300b vacuum tubes. In standard
equipped with anti-vibration feet, adapted to the weight of the device. Backlight logo. Easily accessible fuses protecting the
amplier in case of a power tube failure. Thanks to PSE Parallel Single Ended circuit archtecture and specialy designed output
transformer it provides 15W and low THD distortions. Match with dedicated Sagita line pre-amplier guarantee outstanding
sound performace for a reasonable price.






Please kindly check if the packaging of the amplier has not been damaged during transit. If you nd any damages, please
immediately contact your dealer. Remove the amplier and accessories from the packaging. Make sure that the content is not
damaged.


UNPACKING

The package should contain:
• Fezz Mira Ceti vacuum tube power amplier
• vacuum tube of type 300B - 2 pcs.
• vacuum tube of type 6SN7 - 2 pcs.
• power cord
• user’s manual
• cotton gloves
• optional: vacuum tube protective cage

PACKAGE CONTENT

4
Place the amplier on a stable surface. Carefully remove the vacuum tubes from their packaging and install them in the
appropriate sockets, as show below, and adhering to the numbering scheme as identied on the packaging.
Due to the presence of high temperatures during normal operation of the vacuum tubes, the location that you pick to place
your amplier should ensure ample ventilation, a free ow of air. Please maintain at least 10 cm clearance between the
housing of the amplier, together with the vacuum tubes, and other devices or elements of the interior.
The sound quality may be degraded as a result of vibrations. Therefore we recommended to place the amplier on a at and
stable surface.





DESCRIPTION OF THE POWER AMPLIFIER
VACUUM TUBES INSTALLATION
WHERE TO PLACE YOUR POWER AMPLIFIER
1 300B power tubes socket for a left channel
2 6SN7 driver tube socket for a left channel
3 6SN7 driver tube socket for a right channel
4 300B power tubes socket for a right channel
5 Output transformers housing
 
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

5
1 Source signal input (MONO)
2 Speakers outputs
3 Ground signal loop ON/OFF
4 Main fuse socket
5 IEC power supply cord socket
6 Mains switch


The gure above shows the rear panel view of the power amplier, together with a description of the inputs and outputs
allowing for connection of the other elements of your audio system.
Follow the instructions below to connect Your sound system correctly.




 
Check the impedance of the speaker set. Connect the speaker cable to the appropriate terminals on the rear panel of the
amplier. Depending on the impedance of the speakers, connect it to the terminal marked either 4 Ω or 8 Ω. If your speaker
impedance is 6 Ω - connect the speaker wire to the terminal 8 Ω.


Connect the line preamplier or variable output to the input source in the Mira Ceti 300B power amplier (1). In order to
achieve the highest sound quality, use only high-quality RCA cables.
Pay attention to the proper connection and distinction of the right (R) and the left (L) channels. For the best sound quality,
we suggest using the Fezz FAC 01 interconnect cable dedicated for Fezz Audio vacuum tube ampliers.
Make sure that the amplier is switched o. Connect the power cord to the IEC socket on the rear panel of the amplier.
The amplier is designed to operate at a rated voltage of 230V / 50-60Hz. Connecting the device to a mains network with
incorrect parameters can lead to damage that is not covered by manufacturers warranty.
STEP 1 SPEAKERS CONNECTIONS
STEP 2 AUDIO SIGNAL SOURCES CONNECTIONS
STEP 3 POWER CORD CONNECTION



6
Any tube amplier requires an initial pre-heating (or „burn-in”) period, in order so that it achieves its full sonic potential. This is
due to the presence of residua polarization of dielectric elements and due to a necessary stabilization of working parameters of
the vacuum tubes. The stabilization of the electrical parameters of the system occurs in a natural process whilst playing music
through your audio system.
A preliminary degree of pre-heating of the amplier is reached after about 10 hours of quiet music playback. Full sonic
capabilities shall stabilize and unfold within a time-span ranging from
40 to 60 hours of music reproduction at a moderate volume levels.
Your amplier is equipped with automatic bias module. It’s necessary to use vacuum tubes that have previously been pre-
selected and paired up in quads or pairs.
1) Disconnect the amplier from the mains socket, the power supply.
2) Remove the currently installed tubes from their respective sockets. Plug in the new replacement vacuum tubes in these
sockets.
Make sure that all of your wiring is connected in accordance with the information as provided above on page 5 of this manual.
Turn on the mains power of the Mira Ceti 300B mono power amplier – the vacuum tubes shall begin to glow. Make sure that the
sound source is turned on, playing, and then gradually increase the volume level in your preamplier.
BURING-IN PROCESS
VACUUM TUBES REPLACEMENT
VACUUM TUBES PROTECTIVE CAGE




PREMIUM VACUUM TUBES SET

7
If you have veried the aforementioned situations, and your problem still persists, please contact your local Fezz Audio dealer.-
If your amplier does not work as it is supposed to, it is fairly easy to diagnose and remedy some of the common malfunctions,
by following procedures as outlined in this following.


THE PROBLEM PROBABLE REASON SOLUTION
After turning the power
switch to the ON position, the
amplier does not switch on.
A blown fuse Please exchange to faulty fuse to a new one (3,15A T),
within the fuse holder as depicted with index 4 on
page 8 of this user’s manual.
An improper connection of the
mains cable
Please check if the plugs of the mains cable are properly
inserted into the electrical mains socket and to the
socket as depicted with index 5 on page 8 of this user’s
manual.
The sound produced by the
amplier is distorted. A hum
or pops have appeared and
are coming from one of the
channels.
An improper placement of the
vacuum tubes in the sockets
Switch o the amplier. Wait until the vacuum tubes
cool down. Check for proper placement of vacuum
tubes in their sockets. If necessary – correct their
orientation.
One of the driver tubes (6SN7)
has lost its nominal working
parameters
Switch o the amplier. Wait until the vacuum tubes
cool down. Exchange the positions of the driver
tubes between channels. Turn on the amplier. If the
disturbing sounds have moved to the other channel,
inform Your local Fezz Audio dealer about tube which
need to be replaced.
One of the Power tubes (300B)
has lost its nominal working
parameters
Switch o the amplier. Wait until the vacuum tubes
cool down. Exchange the positions of the power
tubes between channels. Turn on the amplier. If the
disturbing sounds have moved to the other channel,
inform Your local Fezz Audio dealer about tube which
need to be replaced.
After connection to the phono
preamp hum from both
speakers appeared
Switch GND signal to ON or OFF postion adapticed
with index 4 at page no. 5.

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