Name: CH PRECISION A1 | Amplificatore finale stereo
Brand: Ch Precision
SKU: 3841
Price: 27000 EUR
Availability: InStock

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

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CH PRECISION A1 | Amplificatore finale stereo

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