Appendix 2

–Features, Technical Data and Application Examples

–Specifications

–Application Examples

Features, Technical Data and Application Examples
Features: 
  • 127 step volume control from -52dB to 0dB attenuation with 12 LED level indicators
  • 5 Inputs with LED indicators
  • Remote control via universal remote control (RC5 code)
  • Options for shunt operation (-52dB to -6dB)
  • 5 way Silver alloy relay input switching
  • LED‟s driven on/off, not “multiplexed” to remove digital noise
  • Audio PCB includes option for fitting two LSK389A forming a direct coupled zero feedback J-Fet buffer to make a stand alone buffered passive preamplifier
  • Control PCB delivered as one PCB but allows “break-off” of the rotary encoder & LED parts connection via supplied 20-Pin IDC cables
  • A single Control PCB can control up to 3 Audio PCB‟s (6 channels single ended or 3 channels balanced)
  • Control PCB connects to Audio PCB via 20-Pin IDC cables (supplied)
  • Power Supply using schottky diodes and low noise regulators
  • Mains transformer with 115/230V Primary capable of supporting 3 Audio PCB‟s with buffer
  • Gold plated, 70 micron Copper PCB‟s
  • Includes drill template (PDF for printing on paper) for drilling front panels for LED’s, encoders and
  • fittings

 

Specifications:
Passive operation standard mode 
  • Maximum input/output level: 3.5v rms
  • Input impedance: Fixed 100kOhm
  • Adjustment range: -52dB to 0dB in 127 steps
  • Output impedance: < 25kOhm
Passive operation 100k shunt mode (option) 
  • Maximum output level: 3.5V RMS (note, input level is not limited in shunt mode)
  • Input impedance: > 100kOhm
  • Adjustment range: -52dB to -6dB in 127 steps
  • Output impedance: < 50kOhm
Passive operation all modes 
  • -3dB Bandwidth: 100kHz (with no capacitive load)
  • THD + N: < 0.0001%
  • Noise: > -120dB (re. 2V)
Audio module with LSK389 buffers fitted 
  • -3dB Bandwidth: 100kHz (with capacitive loads up to 1nF)
  • THD + N: < 0.004% (2V RMS 10K load)
  • Noise: > -120dB (re. 2V)
  • Output impedance: < 50 Ohm
Application Examples:
1. 2-channel buffered passive Linestage of highest quality with remote 
  • 1 X Control Module
  • 1 X Audio Module
  • 2 X LSK389
2. Upgrade any 2-channel preamplifier or integrated amplifier with remote control 
  • 1 X Control Module
  • 1 X Audio Module
3. 2-channel tube preamplifier of highest quality with remote 
  • 1 X Control Module
  • 1 X Audio Module
  • 1 X Universal Tube Stage (UTS) Module
4. 2-channel balanced tube preamplifier of highest quality with remote 
  • 1 X Control Module
  • 2 X Audio Module
  • 2 X UTS Module
5. 5.1-channel tube preamplifier of highest quality with remote 
  • 1 X Control Module
  • 3 X Audio Module
  • 3 X UTS Module