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AMPLIFICATORE FINALE STEREO CH PRECISION A1

COD: 3841
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Descrizione

AMPLIFICATORE FINALE STEREO CH PRECISION A1

 

Finale di potenza stereo (tramite scheda opzionale Analog_BUF). Potenza 2 x 100W su 8 ohm in stereo o bi-amp e 1 x 350W su 8 ohm in mono a ponte. Pura classe A a discreti senza condensatori sul percorso del segnale per buffer di ingresso e configurazione in classe AB per la sola parte di potenza. Circuitazione simmetrica dual-mono. Trasformatore di alimentazione da 1200VA montato su un particolare silent-block, è collegato a un blocco di condensatori a 4 poli da 4X47.000 mF con sezioni separate per i circuiti di ingresso, driver e le sezioni finali. Possibilità di variare la controreazione da 0% a 100% con step del 20%, in modo da trovare il miglior interfacciamento con i diffusori. Collegamenti interni e terminali di uscita in argento. In dotazione solo un ingresso mono, selezionabile tra RCA, XLR e BNC. Per l’utilizzo in stereo, è necessario l’acquisto della scheda Analog_BUF. Display a colori RGB Amoled con risoluzione 480×272 pixels. Ingresso USB per aggiornamenti software. Controllo remoto tramite presa Ethernet.


Altre caratteristicheAnalog Input Stage

  • Pure class A, fully symmetrical design
  • Fully discrete, ultra low noise, high slew rate design
  • No capacitor in the audio signal path

Analog Output Stage

  • Amplifi er output stage and listening room temperatureindependent bias, Patent-pending ExactBias circuitry
  • Output stage power transistors die and heat sink temperature constantly monitored
  • Pure class A ultra low noise driver and class AB pure follower power stage
  • No output relay
  • Argento loudspeaker binding posts and internal wiring

Power Supply

  • 1200VA power transformer mounted on silent-blocks for minimal vibration transmission
  • Magnetically and electrostatically shielded transformers
  • Hyper fast soft recovery diode bridge rectifi ers
  • 4-pole 47’000uF reservoir and fi ltering capacitors

Global Versus Local Feedback Ratio

  • Ratio ranging from 0% – local feedback only – to 100% -global feedback only – in 20% steps
  • Feedback ratio can be set on the fl y from the user interface
  • Adjust feedback ratio according to a given loudspeaker or even each specifi c driver in bi-amplifi cation modes

Gain Trimming

  • Trim input gain to accommodate loudspeaker sensitivity and room size
  • 24dB range in 0.5dB steps

Protections

  • Non-invasive output stage voltage, current as well as power transistors die and heat sink temperature monitoring
  • Protection procedures in case of output short circuit, open connection or excessive temperature
  • Instantaneous output power and amplifi er temperature can be displayed on the front panel
 
Analog inputs

 

Inputs type Balanced (XLR), one connector per board
Single-Ended (RCA & BNC), one connector per board
Input impedance Balanced: 94kΩ
Single-Ended: 47kΩ or 300Ω
Input stage JFET input stage
Ultra-low noise, discrete fully differential stage
24dB range adjustable gain in 0.5dB steps

 

Amplification

 

Amplification stage Ultra-low noise full discrete class AB design
5 pairs of complementary output transistors
Bias Patent-pending bias circuitry for constant bias operation
Feedback User-adjustable local vs. global feedback ratio, from 0% to 100% with 20% steps 
Bandwidth DC to 450kHz (-3dB) at 1W into an 8Ω resistive load
Signal to Noise Ratio Better than 115dB in stereo and bi-amp modes
Better than 118dB in bridge mode
Total Harmonic Distortion + Noise Less than 0.1% with 0% global feedback
Less than 0.01% with 100% global feedback

 

Analog outputs

 

Binding posts Two pairs of Argento binding posts for loudspeakers connection
Monitoring Non-intrusive DSP-based protection of the amplifier
Instantaneous voltage & current values are permanently monitored for each channel
Protections Short-circuit protected
Disconnected loudspeaker detected
Over-temperature of the heatsink, fans are activated if needed
Over-temperature of the output transistors

 

Power supply

 

Transformer 1’200VA single transformer, oversized for low-noise operation
Power capacitors  2x 47’000uF/63V 4-poles capacitors 
Regulators Non-regulated symetrical power supply for the power stages
Eight local regulation stages for input/driver stages
Seven local regulation stages for the logic/display

 

General

 

Display 480×272 pixels, 24bits color, AMOLED
Mains operation Selectable 100V, 115, 230V AC, 47-63Hz
Power supply consumption <1W (standby), 1200W max in operation
Dimensions/Weight 440 x 440 x 120mm (W x D x H), 43kg
Remote control Ethernet interface, TCP/IP control


Informazioni aggiuntive

Peso 45 kg

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