CH-PRECISION L1

Preamplificatore analogico stereo. Controllo di volume con risoluzione a 20 bit realizzato con una rete di resistenze R-2R per 118 dB di range con step di 0.5 dB. Circuitazione totalmente simmetrica in classe A che utilizza esclusivamente transistor. Alimentazione con numerosi stadi di regolazione completamente analogici. 4 ingressi XLR, 2 RCA (WBT) e 2 BNC. 2 uscite XLR, 2 RCA (WBT) e 2 BNC con buffer separati. Display a colori RGB Amoled con risoluzione 480×272 pixels. Ingresso USB per aggiornamenti software. Controllo remoto tramite presa Ethernet. Connettore per stadio di alimentazione esterna X1.

Specifiche:

http://www.audiogamma.it/caricamenti/pdf_link/CH-Precision-L1_flyer_0v9.pdf

Recensioni:

Review: CH Precision L1 Dual Monaural Line Preamplifier, and M1 Reference Power Amplifier

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Descrizione

Modularity

Three L1 configurations are available:

  • Monaural operation, with 8 inputs
  • Stereo operation, with 8 inputs for each channel
  • Monaural operation, with 16 inputs
Volume control

For each channel two R-2R ladder network in balanced mode control the volume. Tight tolerances high-grade metal film resistors as well as fast switching, distortion-free analog switches are used to adjust precisely the listening level. Each ladder has the following features:

  • 20bits R-2R ladder network
  • 118dB volume range in 0.5dB steps, from -100dB to +18dB
Analog Signal Path

Each channel is physically mounted on its own board to ensure the best immunity against crosstalk, and has the following features:

  • Ultra low noise, high bandwidth, high slew rate design
  • Pure class A, fully symetrical design
  • Fully discrete transistor based circuitry
  • Phase inversion and Mono modes
Power Supply
  • Dedicated discrete regulated linear power supplies
  • Ultra low noise, high accuracy regulation
  • Oversized mains transformer
  • Shunt regulators for critical stages
  • Over-current protection
  • Can be powered from the X1 External Power Supply
Analog Audio Inputs
  • Four balanced XLR connectors
  • Two single-ended RCA connectors
  • Two high-bandwidth coaxial BNC 50 Ohm connectors
Analog Audio Outputs
  • Powerful discrete output buffer
  • Two balanced XLR connectors
  • One single-ended RCA connector
  • One high-bandwidth coaxial BNC 50 Ohm connector

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