Aiming to meet the uncompromising expec-tations of our
users all over the world, we continuously strive to develop and improve the
well-known build quality and finish of the COPLAND range of audio
products.Designing audio equipment presents us with an integral paradox: How to
scientifically approach an audio system that is to perform as a medium of art.
As with other art forms, our perception and appreciation of music would seem to
defy logi-cal classifications and structural thinking, and yet, these are
scientific principles that an audio designer must use as a basis for evaluating
sound quality.The audio designer is a performer of science and craftsmanship:
However, his work must be carried out with artistic devotion and commitment.
This pursuit of excellence is at the centre of the COPLAND design philosophy,
and we are convinced that you will discover our commitment to it, when you
experience your favourite music through COPLAND equipment.
Amplificatore integrato a
valvole da 50 + 50 W RMS. Stadio preamplificatore a valvole (tipo 1xE83CC e
2x12BH7), stadio finale a valvole (tipo 4xKT88), componentistica
superselezionata, trasformatore d'uscita lineare da 5Hz a 100KHz, ingressi linea
e phonoMM, telecomando in dotazione
The
COPLAND CTA405 is the result of careful research and development, combining the
best of classical construction with the latest in circuit design.The current
capacity of the CTA405 power supply and output transformers is fully sufficient
for a 100 Watts output power. However, with operation conditions set for minimum
variation of plate and screen current in the output stage, excellent performance
is obtained with very low feedback at 2x 50 Watts per channel.The output
transformers are specially made for this amplifier. Employing a high quality
silicon ion core and perfect symmetry of the segmented windings, a frequency
response from 5 Hz to 100 kHz is obtained with low distortion and high stability
over the entire audible frequency range.The system remote supplied will also
control the Copland CD players.
Preamplificatore stereo a
valvole in Classe A, valvole selezionate tipo ECC83. Configurazione dual mono. 5
ingressi stereo, 1 ingresso Phono dedicato ad alta qualità. Possibilità di
controllo standby del finale CTA 520. Telecomando in dotazione.
For
low level voltage amplification, valves are in a league of their own with
respect to linearity and musicality. For nearly a decade, COPLAND has
contri-buted to the refinement of amplification using these classic devices. The
CTA 305 employs reliable E83CC valves selected after ageing to assure optimal
compability.Each class A line level amplifier circuit is divi-ded into two
separated non inverting units. This allows us to use a much less complex circuit,
with increased stability, and no requi-rement for internal compensating networks.
Discrete DC power supply regulates designed for nearly zero output impedance
isolate individual gain stages from each other.In addition to the five sets of
line-level inputs, the CTA 305 offers a high quality phono level amplifier. For
the listener with a large investment in LP's, this amplifier provides an
opportunity to recover musical pleasures and more nuances from irreplaceable
recordings.
Amplificatore finale di potenza a valvole.
Potenza 2 x 90W a 8ohm. Design che impiega 12 valvole, 4 KT120, 2 6550, 4 12BH7
e 2 ECC81. Stadio di alimentazione ad alto voltaggio completamente regolato con
trasformatore schermato a nucleo toroidale. Condensatori in polipropilene.
Connettori d'uscita WBT dorati da 200A
The
CTA506 power plant is based on the KT120 power valves. These valves are a new
variant of the legendary 6550 / KT88 power valves. For more than half a century,
these classic valves have been the foundation of numerous of high quality
amplifiers and surely, they will continue to serve as one of the premium choices
among manufactures of high-power valve amplifiers.However, nowadays KT120 is the
most powerful dedicated audio tube in production. In comparison with the KT88,
nearly 30% more power can be drawn from these impressive valves. With a plate
dissipation rating of 60W, a pair of KT120 tubes in push-pull configuration can
deliver nearly 200W of audio power. When used in circuit designs of more modest
power outputs, the KT120 can deliver incredible quantity of headroom and dynamic
without overloading. When output powers of more than 50W are going to be
provided from a power amplifier, the input and driver circuits of the amplifier
are confronted with a dramatic increase of current needed to supply the power
devices of the amplifier. This is a reality regardless if the amplifier is based
on bipolar transistors, Fets, or vacuum tubes technology, and no matter if
single high power output devices are used for the design or if the amplifier
employs multiple low power devices in a parallel configuration.Even though
Fets-semiconductors and audio valves in theory are voltage controlled devices,
these also require relatively low impedance driver circuitry with current
capability, partly due to the increase of input capacities and partly due to the
often neglected fact that also audio valves are drawing current through their
input terminals. To prevent excessive loading of the amplifying stages of the
amplifier, CTA506 employs efficient buffer circuitries as a method of
partitioning the load from the amplifying valves. The buffers are current
amplifiers with very low distortion and they do not amplify the signal, they
only make it stronger. Another benefit from the use of buffer circuitries is
that they allow low impedance DC-coupling between the driver and power valves of
the CTA506. The CTA506 push pull output stages consists of a pair of marched
KT120 in fixed ultra-linear configuration, giving the low distortion of triodes
combined with the power of tetrode valves. A dedicated power supply for the
input stages of the amplifier allows the massive central reservoir capacitors of
more than 3000-microfarad to independently serve the output valves.In order to
isolate power supply fluctuations of the power stage from entering the input and
driver stages of the amplifier, the CTA506 employs active valve regulation by
the use of two pieces type 6550 power valves, one of the valves dedicated to the
driver stages only and the other regulating the amplifying stages with only a
fraction of deviation from the voltage chosen to operate the valves in this
application. The huge termionic power valves used in this construction are very
attractive to look at; we have therefore decided to make them clearly visible by
situating the valves behind lateral perforations on the front panel, thus
creating what we consider to be a stunning design to mach the sonic virtues of
this amplifier.
Preamplificatore
multicanale a valvole in Classe A a 6 canali, valvole tipo ECC83, 6 ingressi
analogici 5.1 per DVD o SACD, regolazione indipendente del volume per i 6
canali. Possibilità di controllo standby del finale CVA 535. Telecomando in
dotazione.
The
CVA 306 six channel valve preamplifier establishes a new standard within
multi-channel performance. In addition to the five normal stereo inputs, CVA 306
accepts six channel analog outputs from DVD surround sound / DVD or SACD audio.
The pure class A high output voltage amplifiers of CVA 306 has a substantial
overload margin and will, with effortless ease, accommodate the full dynamic
range available from the digital program sources. A substantial power supply
rejection ratio is built into the signal carrying circuitry, in order to keep
audio information completely unaffected by the power supply.Employing excellent
line circuit identical to the COPLAND CTA 305, this amplifier offers the unique
possibility to explore the authority of high quality valve amplification in a
music and film system.
Finale di potenza
multicanale per applicazioni A/V. Potenza 125W x 5 canali. Costruzione
completamente modulare. Lo standby può essere controllato dal pre CVA 306.
A five channel amplifier with power to drive any home theatre system to
realistic levels.
The
COPLAND CVA535 retains its stylish exterior with emphasis on build quality,
efficient air flow and temperature control.A single chassis employs five
independent amplifier modules, each with its own rectifiers, filtering and
regulation etc. By keeping the entire channel on a single circuit board, the
length of the pcb tracks are kept to an absolute minimum for accurate dynamics
and spatial image.The CVA535 has a built-in soft start circuit for prolonged
reliability with the added safeguard of DC and thermal protection for extra
assurance. All channels accepts single ended as well as balanced inputs and the
standby switch can be controlled from either the COPLAND CVA306 pre-amplifier or
the system remote control.
Compact Disc Player a caricamento
dall'alto. Meccanica Philips CDPRO2LF. Sistema di conversione D/A Wolfson WM8741
duale differenziale per ogni canale a 24 bit/192 KHz. Stadio di uscita a
discreti in classe-A. Stadio di alimentazione separato per ogni sezione. Uscite
RCA/XLR. Telecomando in dotazione.
CDA825
CD-PLAYER As a result of our quest for refining the musical capabilities
of the CD-media, and our constant efforts to understand and taget the underlying
technological requirements, we believe that the introduction of the CDA825 is
offering significant improvements of sound reproduction from CD-media.Obviously
the CD-media is a digital representation of an initially analog event, and the
design of the CDA825 is therefore determent by an ambition to reconstruct the
complex and delicate harmonic structure of the original analog waveform. This
objective adheres to all details of the design, as well as their integration
into the whole. Starting with the power supply, the following paragraphs offers
some insight into the various design considerations. Power supplies The routing
and grounding scheme of the CDA825 power supply provides effective isolation
between the digital- and analog- parts of the CD-player. Furthermore, the power
supply has been designed to ensure constant low output impedance towards the
power consuming electrical circuits. The numerous individual power supplies in
CDA825 are designed to operate with a constant power, thereby eliminating
reverse modulation towards the transformers and the AC supply grid. Error
correcting capability The servo/error correction circuit is a prime source of
ensuring error-free extraction of the data from the disc. These circuits are
designed by a few select semiconductor manufacturers. Extensive testing was
performed in order to select the best chip-set available, and then to provide
optimum operation conditions for these devices.Inherently to the red-book CD
standard, is an 8 -14 modulation, interleaving and Reed- Solomon error
correction. Due to cost reasons, not all available decoder chip-sets include a
full implementation of these powerful error- correcting capabilities. The
Philips chip-set used in the CDA825 provides full implementation of all
error-correcting schemes of red-book CD and hence, guarantees that the extracted
data from the CD-Pro2LF mechanism are recreated correctly.
Buffer
circuitry In order to
provide further isolation between the data-extraction parts (drive, servo and
error correction) and the reproduction parts (DAC, analog and output filtering),
a digital buffer containing two seconds of musical data has been included in the
signal path between the drive mechanism and the DAC’s. The purpose of this
digital buffer is to isolate the drive from the DAC’s.The data, as they are
extracted from the drive, are not completely equidistant in time; there are
slight variations (jitter) imposed in the time domain. By absorbing these slight
time variations at the input side of the buffer, the memory of the buffer is
used as a data-pool from which the extracted data are clocked out towards the
DAC’s at an absolutely constant rate (completely equidistant in time) - and
consequently the jitter in the data is eliminated.The DAC’s are feed digital
data arising from the registers of the memory device and so the modulations in
time and electrical energy (drive variations in power consumption) are
completely eliminated; the DAC’s are fed data from an environment that do not
comprise any moving parts. Digital filter
In the field of
psychoacoustics it is a well known fact, that when modelling the human hearing,
the perception of sound exhibit masking effects - both in the time- and
frequency domain. The time domain masking effect (temporary masking) can roughly
be explained as, the ear being less sensitive to noise immediately after an
impulse than before. This fact has been exploited in the design of the digital
up sampling filter for the CDA825.As the bandwidth of CD replay is limited to
approx. 20 KHz, the low pass filters used to up sample the CD data exhibit a
pass band up to this frequency. A conventional linear phase up sampling filter
has an impulse response that is symmetrical in time - i.e. equally much 20 KHz "ringing"
before and after an impulse. The up sampling filters for the CDA825 has been
designed in such a manner that the pre-"ringing", the "noise" prior to an
impulse is reduced under consideration of the temporal masking of the human
hearing. This filter design yields a stable and "quietness" to the sound of the
CDA825; transients arise out of a silent background and transients are perceived
to be very clean and well defined. These sorts of filters have lately become
known as apodizing filters.Clock circuit The clock circuit is responsible for
providing the correct data for conversion into analog voltage at the correct
instant in time. If the clock phase has variations in time (phase modulation:
the phenomena known as jitter) the data will not be converted into analog
voltages at the correct instant in time. The net-effect of these timing errors
correspond to the introduction of amplitude errors - i.e. that the analog
voltages are not the correct analog voltages for recreating the analog waveform
with high signal integrity and high fidelity. For this reason the jitter
performance of the clock circuit as well as the layout of the clock-distribution
lines are very critical. The clock oscillator of the CDA285 is meticulously
designed for optimal jitter performance. The clock oscillator has its own
regulated power supply.Digital to analog converters The CDA825 uses the Wolfson
WM8741 24bit, 192 KHz DAC. Two of these devices are used - one for each channel.
Each DAC consist of two Digital to Analog converters each providing an in-phase
signal and an opposite phase signal. By combining two in-phase and two
opposite-phase signals per channel, the statistical properties of the signals
are taken to advantage; the signal power of the phases correlate and add-up in
constructive addition, whereas the noise power of the phases are decorrelated in
a manner that improves on the signal to noise ratio of the resulting analog
waveform.Analog circuitry and post filtering Due to the high degree of over
sampling, the undesirable aliasing energy at the output of the DA converters is
minimized. This has allowed a design of a high bandwidth analog output stage and
a lower order analog filtering.Sound quality The hallmark of the Copland sound
philosophy, the deep, tight and free flowing bass reproduction, seamless
mobility of musical energy and authentic recreation of the time dimension from
the original recording session, are inherent virtues of the CDA825.The dynamic
resolution of the CDA825 is extraordinary in the sense that musical energies
related to complex amplitude modulations appears to flow with an unconstrained
mobility and acceleration Whether it’s a small acoustical trio or a large
orchestral outburst, the complexity of the harmonics and the fidelity of the
time-dimensions remain intact. Everything remains in place and with exceptional
resolution. The individual instruments are reproduced with absolute
unconstrained musical flow. In fact, it could be a challenge for other
components in the reproduction chain to reveal these aspects of the CDA825’s
capabilities.
Correttore digitale di
acustica ambientale. Semplice calibrazione premendo un pulsante. Annulla
l'influenza del locale d'ascolto in un sistema hi-fi.Rilevazione ambientale tramite microfono. Sistema di rilevazione grafica tramite
il collegamento ad un PC con Windows. Possibilità di upgrade futuri del software
di gestione. Convertitori D/A 24bit/192KHz.
Un ingresso e un'uscita RCA per il segnaleLa Copland introduce un
rivoluzionario correttore di acustica ambientale, destinato a migliorare
drammaticamente le prestazioni di qualsiasi sistema Hi-Fi a cui sia applicato.
Il DRC-205 è basato sulla tecnologia Dynaton’s DDRC ed effettua una misura
dell’ambiente attraverso un microfono fornito a corredo. Sarà necessario solo
collegare il processore Copland tra la sorgente e il preamplificatore e premere
un tasto affinché l’unità esegua in modo del tutto autonomo la misura
dell’ambiente e imposti la curva di correzione da imprimere. I principali
benefici apportati dal DRC 205 saranno una minimizzazione del negativo apporto
dell’acustica ambientale, un miglior contrasto tonale, una maggiore precisione
del messaggio sonoro e una gamma bassa molto più precisa e rifinita. È poi
possibile gestire la macchina utilizzando un applicativo per PC (Windows) dalla
quale sarà possibile agire sui parametri di equalizzazione e
leggere/editare/richiamare le curve caricate nel sistema. È inoltre possibile
effettuare degli up-grade software gratuiti per aggiornare gli algoritmi con cui
funziona la macchina, attraverso un’interfaccia user-frendly scaricabile
gratuitamente dal sito Dynaton o Copland. Nel DRC-205 sono utilizzati componenti
di livello assoluto tra cui convertitori A/D e D/A allo stato dell’arte a 24
bit//192kHz.
Caratteristiche tecniche-Connessioni IN/OUT: Stereo RCA, 1V nominale-Risposta in frequenza: 15hz-20 kHz-Risoluzione: a 24 bit-Consumo di corrente: 10W-Peso: 8 kg-Dimensioni: 430LX86AX390P
The
launch of Copland DRC-205 is the world premiere of an add-on unit for high-end
room correction. Copland DRC-205 drastically improves the sound reproduction at
the push of a single button. The influence of room acoustics has been one of the
most disregarded factors in the pursuit of the perfect sound experience. In fact,
most listening room have serious acoustic problems degenerating the sound
performance.
The acoustics of the listening room is most likely to be the weaker link of the
hi-fi system. The direct sound from the loud-speakers is blended with unwanted
sounds from the room. In a typical living room, the standing waves at room
resonance frequency and sound reflections easily account for +15dB / -20dB
ivergence from the desired audio characteristics, deteriorating the sound
quality from the hi-fi system. The DRC-205 analyses and calibrates itself to
tonal balance, a distinct three-dimensional sound experience, while minimizing
the rooms nfluence on the sound.What is Digital Room Correction?The invention of
Digital Room Correction (DRC) is one of the most significant improvements to
sound reproduction for decades. DRC is an advanced time domain based technique
where omplex anti-reflection signals are generated to counteract room resonances
and room cancellations while leaving the original sound signal unaltered. The
Copland DRC-205 is based on the Danish technology provider Dynaton’s DDRC module.
The DDRC module is the key component of the system, employing a unique scalable
room compensation algorithm without distortion of the original music signal.
Copland has found the highly complex and patent pending Dynaton algorithms to be
truly uperior and recommendable for high end applications. Operation The Copland
DRC-205 is very easy to operate and does not require any previous knowledge of
room acoustics or audio technology. Simply connect the Copland DRC-205 between
the signal source and the amplifier. Plug in the accompanying microphone, push a
single button, and the room will be thoroughly measured and the entire system
optimized within seconds. The Copland DRC-205 room correction is now activated.
Besides the default setting for flat frequency response in the listening room,
alternative predefined sound profiles can be activated by a single push of the
select button.High performance Digital Room Correction Performance The
difference between an uncompensated system and one with Copland DRC-205 is
distinct and clearly audible. Minimizing the effects of room acoustics Natural
tonal balance with more contrast and definition Highly improved stereo imaging
3D and depthReal bass response Voices are clear and natural FeaturesThe first
impression of the Copland DRC-205 hides the fact that there are many more
possibilities than the user friendly front panel reveals. The predefined sound
profiles will satisfy the vast maority of music lovers. However, the more
demanding users can store their own sound profiles via a standard Windows PC.The
Copland DRC-205 comes with a graphical user interface, which can be installed
from the ccompanying CD-rom. By installation on a standard Windows PC, an
advanced equalizer can be accessed, allowing the user to adust the frequency
response in the room and to actually see the frequency response of the system on
frequency curves before and after compensation.Copland DRC-205 can be connected
between the signal source and amplifier, or to any amplifier with an ordinary
analog tape monitor in/ output. In co-operation with Dynaton, Copland offers the
opportunity to upgrade the DDRC technology. Updates are done via user-friendly
software available for download on the Copland and Dynaton websites. he Copland
DRC-205 employs state-of-the-art 24 bit/192kHz AD/DA-converters which can also
be found in the critically acclaimed Copland CDA-822 and CDA-823 CD-players.
Graphical user interface A standard Windows PC will allow the user to adust the
frequency response in the room through the advanced equalizer. Tech
Specifications Application Digital Room Correction Features Eliminating room
acoustics problems Optimizing system performance Frequency response adjustments
Impulse response adjustments Graphical user interface throughstandard Windows PC
Connections Stereo RCA input, 1 V nom. Stereo RCA output, 1 V nom. Frequency
Range 15 Hz – 20kHz optimization range Resolution Lossless 24 bit audio signal
Power consumption 10 WShipping weight: 8 Kg Dimensions 430 (W) x 86 (H) x 390
(D) mm.
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Aiming to meet the uncompromising expec-tations of our
users all over the world, we continuously strive to develop and improve the
well-known build quality and finish of the COPLAND range of audio
products.Designing audio equipment presents us with an integral paradox: How to
scientifically approach an audio system that is to perform as a medium of art.
As with other art forms, our perception and appreciation of music would seem to
defy logi-cal classifications and structural thinking, and yet, these are
scientific principles that an audio designer must use as a basis for evaluating
sound quality.The audio designer is a performer of science and craftsmanship:
However, his work must be carried out with artistic devotion and commitment.
This pursuit of excellence is at the centre of the COPLAND design philosophy,
and we are convinced that you will discover our commitment to it, when you
experience your favourite music through COPLAND equipment.
.jpg){kind=small}
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per qui per vedere : FOTO PRODOTTO
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