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Audio Analogue Fortissimo AirTech Lector CD
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Lector de CD Audio Analogue Fortissimo con tecnología AirTech
The Audio Analogue FORTISSIMO CD Player/DAC perfectly exemplifies Audio Analogue’s philosophy to design products which can interface different audio systems at the best audio quality. In fact the Audio Analogue FORTISSIMO CD Player/DAC is not only a CD player but is also provided with all the features making it a high performance digital to analog converter.
Output stage: As always for the Audio Analogue products including a Digital to Analog section the output stages is the part where more experimentation is performed. As first let’s see what is usually done. The best DACs (Integrated Circuit) have a current output type. Therefore a two stage architecture is usually implemented. The first is a current to voltage made by an operational amplifier while the second is a stage performing the voltage gain and filtering. The second stage is made with a circuit based on an operational amplifier or on a discrete components circuits. Both the strategies often (almost always) use feedback technique. What Audio Analogue have realized is a single circuit, all made by discrete components, which performs all the above functions in a zero feedback topology. Is not Audio Analogue intention entering the debate sometimes coming out in the audio field about the goodness of the feedback technique. Audio Analogue’s goal is instead to find new circuits which could give different sound qualities. So they have decided to completely reinvent the output stage approach. In fact as it is said: “if you always walk on the same streets you will always arrive in the same places”. What Audio Analogue have found is a different sound which has been defined as much more “natural” by the listeners in the tests they have performed.
USBDAC Section: Because of the increasing importance of music reproduced by a USB connection, Audio Analogue have developed a technology to play such files both in adaptive and asynchronous mode. The accepted input sample frequency reaches the 192KHz for a 24bits file stream. The USB data stream is converted in a SPDIF signal that is passed to the Digital to analogue conversion section via a galvanic isolated connection.
Digital Input Selection and SRC (Sample Rate Converter): Audio Analogue use a single component to select the digital input, receive the signal and change the signal sample rate. Usually there is a SPDIF receiver selecting the digital signal and extracting the data from the SPDIF selected signal and then a further component, the sample rate converter IC, which works on the extracted signal changing the sample rate. To have a single component making all the tasks is very important because avoids adding jitter in the communication between the otherwise two components.
Clock sources and settable output sample frequency: It is known that increasing the signal sample rate not always improves the audio quality. In fact it seems commonly accepted between the audiophiles that to increase the audio performances the output signal sample rate has to be an integer multiple of the input sample rate or to be the same of the input sample frequency. Some others suggest instead that for each digital to analog converter there is an optimum output sample frequency. Anyway because the common sample rates are integer multiples of two different basic frequencies, that’s say: 48KHz and 44.1KHz, to have the best performances requires having two different clock sources. Such fact is often neglected in DA converters. Instead Audio Analogue have designed two very clean and jitter free clock oscillators to supply the clock to the Sample Rate Converter and DAC. Of the two, just one oscillator is active according to the output sample frequency. Also Audio Analogue permits the user a complete control on the output sample rate frequency. In fact Audio Analogue allow you to change the output sample frequency to find its best set up according to three different output sample frequency selection criterion: Direct, Automatic, Custom.
DAC Section: Audio Analogue use the Texas Instruments 32-bit, 200KHz Sampling, Advanced Segment, Audio Stereo DAC: PCM1795. That is a very performing current output digital to analogue converter.
CD Mechanism: on the Fortissimo CD-DAC, as on every Audio Analogue CD Players, the Teac CD-5010 has been mounted, a mechanism specifically designed for high end audio applications. This CD Mechanism is very sturdy and has a very low Jitter output. The best starting point for a very high performance Player.
Phone Output: using headphones to listen music is becoming more and more popular. This to have a different listening experience or to don’t disturb other people around. Therefore a Phone output, which input is taken directly buffering the output stage, has been implemented.
Trigger Output: As for all the Audio Analogue last generation products a DC 12V Trigger output is supported. In such way the user can turn on all the stereo system having just one unit working in stand by, therefore decreasing the standby power consumption of the chain.
Power supply: a toroidal transformer is used with secondary stages dedicated to each part. The analogue power supply has been realized using all of Audio Analogue‘s strategies to reduce any interference and kill even the smallest of noise from all of its components. Regulation stages have been placed in every sensible circuit point and the bypass capacitors have been chosen not only for their electric performance but also after long and careful listening sessions.
Frequency Response 20Hz-20kHz +/-0.5dB
Sampling Frequency 24Bits/192KHz.
Outputs 1 x RCA (Single Ended), 1 x XLR (Balanced)
Digital Inputs 1 x SPDIF optical, 1 x SPDIF coaxial, 1 x USB
Digital Outputs 1 x SPDIF coaxial
Output Impedance 430 Ohm
Noise Floor -120dBV
Dimensions (H x W x D) 110mm x 445mm x 400mm
Weight - Unit 10 KG
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