Fezz Mira-Ceti-300B Mono Power Amplifier User Manual
- June 5, 2024
- fezz
Table of Contents
Mira-Ceti-300B Mono Power Amplifier
User Manual
Mira Cefi300 B
Mono Power Amplifier
USER’S MANUAL
**SAFETY TIPS
**
-
Never place the Fezz Audio Mira Ceti 300B mono power amplifier near heat sources, such as radiators, heaters or direct sunlight. Ensure adequate ventilation and airflow
-
We also warn against exposure of the power amplifier to conditions such as very low temperatures and/or high humidity.
-
During normal operation, the vacuum tubes radiate significant amounts of heat – there is a risk of burns.
-
The power amplifier should be plugged directly into a wall socket. If you must use an extension cord, please make sure that it has load parameters sufficient to ensure proper handling of current delivery to the device.
-
When cleaning, always disconnect the Titania power amplifier from the power source. Use dry, soft cloth. Do not use water or cleaning agents.
-
If your power amplifier starts to misbehave or to work incorrectly, if its 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 power amplifier.
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 specification.
-
Do not make repairs on your own, or adjustments beyond those as described in this manual. Execution of any unauthorized repairs or modifications of the device results in a loss of warranty.
INTRODUCTION
Thank you for your trust and for choosing the Fezz Audio Mira Ceti 300B MONO
power amplifier. At times when the audio world becomes increasingly digital,
Fezz Audio does not forget about analog lovers. Titania power amplifier is the
Polish, series-produced vacuum tube power amplifier, which is designed for all
music listeners. The Fezz brand is a team of people who are fascinated for
multiple years with the world of sound in its pure, analog form, a team that
adapts proven technologies so as to meet the expectations of a contemporary
audience.
We invite you to familiarize yourself with a clear sound, characterized by
excellent separation, imaging, and dynamics. Let the wide sound scene take on
a new, multiple depths
dimension.
VACUUM TUBE POWER AMPLIFIER
Many of us, when looking upon audio amplifiers of decades ago, keep repeating
a slogan, like a mantra: “Such things are not manufactured anymore”. When we
finally manage to acquire such an amplifier, we treat it in a very unique way.
We look for the best possible location to present it, we adore the moment that
we switch it on and we shall certainly not fail to mention in passing this new
“treasure” of ours to Any of our visiting guests. Whatever we do is all
underlined by a great feeling of fondness to those times long past. Why is
this happening? The most likely reason is that it is a vacuum tube amplifier.
An amplifier with a specific warmth to its sound, with a natural ambiance,
timber. We also do know that the ‘Big Names’ have created their memorable
music albums using vacuum tubes. When one explores this topic in depth, it
turns out that many a prominent musician, till this present day, plays back
music and creates music using solely analog amplifiers, and they justify their
decision with just a few words: “The vacuum tube simply sounds better, it has
a soul and an ambiance”.
Once we purchase such an amplifier, set it up, and hook it up, a kind of
hesitance kicks in … “Gee, this equipment is 40 years old”. Will it continue
to be reliable?
We are aware that there is contemporary production of vacuum tube amplifiers
out there, but these amplifiers are very expensive. Thus, in praxis, they are
exclusively destined for the audiophile circles. And it is at this very point
that the unique offering of Fezz Audio comes into play. A unique vacuum tube
sound, made available at a price point similar to a new, “transistor” based
device as sourced from a market.
INSTALLATION OF THE DEVICE
UNPACKING
Please kindly check if the packaging of the Mira Ceti 300B MONO power
amplifier has not been damaged during transit. If you find any damages, please
immediately contact dealer. Remove the power amplifier and accessories from
the packaging. Make sure that the content is not damaged.
CONTENTS OF THE PACKAGE
The package should contain:
- Fezz Audio Mira Ceti 300B vacuum tube MONO power amplifier
- vacuum tube of type 300B Electro Harmonix Gold – 2 pcs.
- vacuum tube of type 6SN7 Electro Harmonix – 2 pcs.
- power cord
- user’s manual
- cotton gloves
- optional: vacuum tube protective cage
If any of the above items are missing in Your package, contact your dealer immediately.
**DESCRIPTION OF ELEMENTS OF THE POWER AMPLIFIER
**
1,4) 300B power tubes socket
2,3) 6SN7 driver tube socket
5) housing for the output transformers
INSTALLATION OF THE VACUUM TUBES
Place the Mira Ceti 300B power amplifier on a stable surface. Carefully remove
the vacuum tubes from their packaging and install them in the appropriate
sockets, as show below, and adhere to the numbering scheme as identified on
the packaging. Please pay attention to the diameter of the socket and to the
appropriate orientation of the vacuum tube pins. The pins in the base of each
of the vacuum tubes are “coded”, and this has result that the insertion of the
vacuum tube into the socket is possible only in one correct and appropriate
orientation. If, whilst inserting the vacuum tube you sense resistance, and
you can not push the tube into the socket, please check the orientation of its
pins, rotate the tube to the correct position and try again.
WHERE TO PLACE YOUR POWER AMPLIFIER
Due to the presence of high temperatures during normal operation of the vacuum
tubes, the location that you pick to place your amplifier should ensure ample
ventilation, a free flow of air. Please maintain at least 10 cm clearance
between the housing of the amplifier, 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 amplifier on
a flat and stable surface.
INTERCONNECTIONS
signal input- speakers outputs
- mains switch
- socket for the main fuse
- IEC power supply cord socket
The figure above shows the rear panel view of the Fezz Audio Mira Ceti 300B
MONO power amplifier, 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.
STEP 1 / HOOK-UP OF THE SPEAKER
Mira Ceti 300B power amplifier works only in MONO mode. You will need two
devices to make it work in STEREO.
Check the impedance of the speaker set that you own. Connect the speaker cable
to the appropriate terminals on the rear panel of the amplifier. Depending on
the impedance of the speakers that you own, 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.
STEP 2 / HOOK-UP OF THE SIGNAL SOURCE
Connect the line preamplifier or variable output to the input source in the
Mira Ceti 300B power amplifier (1)
In order to achieve the highest sound quality, use only high-quality RCA
cables. For the best sound quality, we suggest using the Fezz FAC 01
interconnect cable dedicated for Fezz Audio vacuum tube amplifiers.
STEP 3 / HOOK-UP OF THE POWER SUPPLY CORD
Make sure that the power amplifier is switched off. Connect the power cord
to the IEC socket on the rear panel of the power amplifier.
The power amplifier is designed to operate at a rated voltage of 230V / 50Hz.
Connecting the device to a mains network with incorrect parameters can lead to
damage that is not covered by the manufacturer’s warranty.
FIRST POWER UP AND GET STARTED
Make sure that all of your wirings is connected in accordance with the
information as provided above on page 9 of this manual. Turn on the main power
of the Mira Ceti 300B mono power amplifier – the vacuum tubes shall begin to
glow. Make sure that the sound source is turned on, and playing, and then
gradually increase the volume level in your preamplifier.
”BURNING-IN” THE POWER AMPLIFIER
Any tube amplifier/power amplifier 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
amplifier is reached after about 10 hours of quiet music playback.
The full sonic capabilities shall stabilize and unfold within a time span
ranging from 40 to 60 hours of music reproduction at moderate volume levels.
In the initial period of operation of the amplifier, it is advisable to avoid
short-term operation periods of the amplifier. Once activated, it should
remain operational for a period of about 4-6 hours.
REPLACEMENT OF THE VACUUM TUBES
Your amplifier is equipped with an automatic bias module. It’s necessary to
use vacuum tubes that have previously been pre-selected and paired up in quads
or pairs.
REPLACEMENT OF THE VACUUM TUBES
Your amplifier is equipped with an automatic bias module. It’s necessary to
use vacuum tubes that have previously been pre-selected and paired up in quads
or pairs.
VACUUM TUBE PROTECTIVE CAGE
The following picture shows the correct positioning of the optional protective
cage for the tubes.
TROUBLE-SHOOTING GUIDE
If your amplifier 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 | THE SOLUTION |
|---|
After turning the power switch to the ON position, the amplifier does not
switch on.| A blown fuse| Please exchange to faulty fuse for 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 amplifier is distorted. A hum or pops have appeared
and are coming from one of the channels.| Improper placement of the vacuum
tubes in the sockets| Switch off the amplifier. 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
off the amplifier. Wait until the vacuum tubes cool down. Exchange the
positions of the driver tubes between channels. Turn on the amplifier. If the
disturbing sounds have moved to the other channel, inform Your local Fezz
Audio dealer about the tube which needs to be replaced.
One of the Power tubes (300B) has lost its nominal working parameters| Switch
off the amplifier. Wait until the vacuum tubes cool down. Exchange the
positions of the power tubes between channels. Turn on the amplifier. If the
disturbing sounds have moved to the other channel, inform Your local Fezz
Audio dealer about the tube which needs to be replaced..
If You have verified the aforementioned situations, and your problem still persists, please contact Your local Fezz Audio dealer.
TECHNICAL DATA
Type: vacuum tube power amplifier
Model: Mira Ceti 300b Mono Power Amplifier
Output power: 15W
Circuit architecture: Parallel Single Ended, A-class
Speakers impedance: 4Ω/8Ω
Inputs: 1x RCA
Harmonic distortion THD: <0,1%
Frequency response: 12Hz-60kHz (-3dB)
Power consumption: 115W
AC fuse: 3,15A T
Net Weight: 13kg
Dimensions (width x depth x height): 340x360x215mm
Tubes: 2x 300b, 2x 6sn7
Colour schemes: Black ice(black), Bleach(white), Big Calm(burgundy), Burning
red(red)
Optional equipment: tubes protective cage
Declaration of Conformity
Manufacturer: Toroidy.pl Transformatory L. Lachowski Sp.k. (owner of Fezz
Audio brand)
Address: ul. Mazowiecka 20 16-001 Księżyno POLAND
I declare that the product:
Brand: Fezz Audio
Model: Mira Ceti 300B MONO Power amplifier
complies with the following European Union Council Directives and Standards
relating to electromagnetic compatibility (EMC Directive 2014/30/EU) and the
low voltage Directive (2014/35/EU).
This declaration of conformity is the result of an examination carried out in
accordance with European Standards for EN 60065:2002+A2:2010+A12:2011+A11:2008
for low voltage, as laid down in article 10 of the EMC Directive.
Księżyno 3.01.2022 Lech Lachowski
Documents / Resources
| Fezz
Mira-Ceti-300B Mono Power
Amplifier
[pdf] User Manual
Mira-Ceti-300B Mono Power Amplifier, Mono Power Amplifier, Power Amplifier
---|---