Pagine
Search this site
Labels
What is stereo?
There are now two system of high fidelity, monophonic (monaural) and stereophonic. Monophonic is a system that starts from one microphone and is fed through a single high fidelity set. Stereophonic is a double system. Two separate microphones are placed at different sides of the orchestra and two different systems are used to keep the two signals or channels separated. Two separate speakers are used, placed on different sides of you room. Stereo is much like 3-D photography, two slightly different sound reach your ears giving you a new dimension in sound.
H.H. Scott '59
Audio Analogue Puccini amplifier
Audio Analogue Crescendo Tuner/USBDAC
The Crescendo Tuner/USBDAC is an extremely interesting and innovative product. It is not just a Tuner but also includes an entire high performance USBDAC section. The Crescendo Tuner/USBDAC can be seen as two different audio sources combined in a single piece of equipment, each source corresponding to a different working mode: Tuner Mode and USBDAC Mode.
The specific circuits for each mode are completely separated physically and just one section at a time is supplied, according to the selected mode (This avoids any kind of interference between the two signal paths). Instead, the analogue output stage is the same for both of the modes. Everything has been realized according to the well known Audio Analogue experience. The power supply is based on a toroidal transformer and each section has its own voltage regulator stage.
The tuner is based on a high performance circuit already used by Audio Analogue on its tuner products. The whole tuner section has been realized in a metallic separated box to shield the RF interference and a special buffer stage has been put between the tuner section and the output stage to further decrease the RF noise.
The USBDAC section is composed by a dedicated section which, working on the USB data, supplies a SPDIF digital audio signal. The digital audio signal is then converted into an analogue one by a high performance DA section composed by: a 96 KHz/24Bit, very low recovered system clock Burr Brown receiver (residual jitter less than 50ps!) and a 24 Bit/192KHz Enhanced Multilevel Delta Sigma architecture DAC (The conversion circuit is placed on a separated board to avoid any high frequency disturbance on the audio signal).
The Crescendo Tuner/USBDAC is controlled by a microcontroller and both the switches on the front board and the remote switches have different functions depending on the mode the unit is working on. The Crescendo Tuner/USBDAC has a very reliable low emission display to not interfere with the audio signals.
All the components, passive and active have been chosen considering their electrical characteristics and sound performance too.
The USBDAC permits you to connect the Hi-Fi system to the PC or MAC via a USB connection. In this way the PC/MAC sees the Hi-Fi system as its audio board and everything which is played on the PC/MAC is reproduced by the Hi-Fi System. This opens up a wide spread of possibilities which we think will be soon appreciated by every, also “old style”, audiophile:
• Listening to tracks in any format (MP3, WMA, FLAC, APE and so on…..) which you have in your PC via a software player. In such cases, according to the player, you can also control the PC (Next track, Previous track, Play, Stop, Pause) by the Crescendo Tuner/USBDAC front switches or remote.
• Listening to an on-streaming tuner. On the web there are a lot of tuner stations which transmit on-streaming, so a lot of stations from everywhere in the word can be listened to.
• Listening to audio movie tracks which are playing on the PC.
The Crescendo Tuner/USBDAC has also a SPDIF Out which can be sent to an external DA converter.
The Crescendo Tuner/USBDAC has both the Trigger In and Trigger Out connections so it can be switched on/off by another unit of the chain and also can switch on/off another unit of the audio chain.
SPECIFICATIONS TUNER MODE
Output Level
FM: 500 - 700mV
AM: 115 - 215mV
Image Rejection
FM: 70 dB min.
AM: >40 dB min.
Auto Stop Sens
FM: 18 - 28 dBu
AM: 45 - 65 dBu
Usable Sens
FM: 12 dBu max
AM: 60 dBu max
Frequency
FM: 87,5MHz - 108MHz
AM: 567KHz - 1,6MHz
Noise Level (0Hz - 20KHz): -120 dB
Signal/Noise Ratio (20Hz - 20KHz) FM: 60 dB min
Signal/Noise Ratio(20Hz - 20KHz) AM: 40 dB min
SPECIFICATIONS USBDAC MODE
Output Level (Maximum rms voltage output value): 2,00
Noise Level (Attenuation 0dB, -3dB band, 1Vrms output): -120 dB
PARAMETERS
Power Requirements: 115 - 220 - 230 - 240 V, 50/60 Hz
Power Consumption: 12 VA
Dimensions (H x W x D): 2,9 x 8,3 x 14,4 "
Weight: 9,9 Lbs
Audio Analogue Rossini VT CD Rev 2.0
Audio Analogue VERDI CENTO
We believe vacuum tube technology is, even now, very valid in treating the audio signal in a preamplifier stage while leaving to solid state technology the task of the Power stage. So this has been our design philosophy: a vaccum tube preamplifier stage to take advantage of the audio properties of that technology and a solid state power stage as much “transparent” as possible. Other important innovations concern the settable Mono/Pre Out and added use functionalities.
6. Pre phono stage
Audio Analogue - CD Paganini
The Paganini offers the latest and best technology to the audiophile seeking a top quality CD-player at an affordable price. Benefiting from the most recent developments in digital sound processing, the new Paganini CD player features true 96kHz/24bit D/A convertion via an Analog Devices AD1855 DAC.
This means that even the normal CD signal is effectively converted at high resolution. Responsible for this great improvement in D/A convertion is the high performance sample rate converter CS8420 by Crystal Semiconductors, up to now only used in professional studio equipment.
The sample rate converter turns the digital signal from the compact disc into a high resoution signal (also digital) which is then sent to the D/A converter with extremely low jitter, thanks to the high precision crystal oscillator used as reference.
The D/D convertion process implies the creation of true 24 bis samples: for this reason, the DAC receiving the high resolution signal always works at its best, providing the output analog stage with the best possible signal. The analog stage is designed, following the best Audio Analogue tradition, using only the finest quality components: polypropylene and Elna for Audio capacitors, high precision (1%), low noise resistors and high linearity opamps. The Paganini CD player is provided with a high performance digital output capable of driving any type of CD recorder or external D/A converter.
Finally, the sophisticated power supply uses a toroidal transformer, one secondary of which is totally dedicated to the analog circuits that are fully separate from the digital supplies. No less than nine regulators guarantee a perfect supply to every part of the Paganini CD player’s complex circuits. Naturally, such a wealth of advanced electronics features are matched by top class mechanical engineering.
The chassis is made of 3mm-thick sheet steel allowing perfect isolation from both mechanical and electromagnetic interference. The 1cm-thick black or silver satin aluminum fascia gives the Paganini CD player an elegant, yet robust and purposeful appearance. The VFD display ensures good readability in all types of lighting. And the IR remote control handset supplied with the Paganini CD player offers total control of all the machine`s functions.
Dimensions:
17.52" (W) x 13" (D) x 3.5" (H)
Weight:
22 Lbs
Analogue Output Level:
2 Vrms (Unbalanced)
Analogue Output Impedance:
< 10 Ohm (Unbalanced)
Digital Output Level:
5 Vpp @ 75Ohm (S/PDIF standard)
Frequency Response:
20 - 20.000 Hz (any source)
Jitter Rejection:
0.00005%
Total Harmonic Distorsion (THD):
<0.001% @ 1kHz
Noise Floor:
-140 dB
Channel Separation:
RL 100 dB / LR 100 dB
Nominal voltage supply:
115VAC / 230VAC 50/60Hz
Max. power consumption:
60 VA