LS-3 Solid State Preamplifier By Audio Research

Inspired by the acclaimed LS3 line stage first introduced in 1992, the current LS-3 combines classic audio engineering principles with modern solid-state performance. Its sophisticated design features a fully balanced differential JFET input stage, a bipolar transistor-based voltage amplifier, and pure Class-A output stages for exceptional sonic accuracy.

A true dual-mono architecture with separate power transformers, precision voltage references, and linear power supplies helps deliver ultra-low noise, impressive dynamics, and outstanding channel separation.

The elegantly crafted all-aluminum chassis blends contemporary styling with a timeless high-end audio aesthetic. A modern touchscreen interface offers convenient control over input naming, display brightness, color customization, and additional system settings, while maintaining a refined visual presentation inspired by the brand’s iconic meter design language.

Sonically, the LS-3 delivers a rich and engaging presentation with excellent speed, clarity, and dynamic impact. Music is reproduced with spacious imaging, impressive focus, and a natural sense of depth that enhances the listening experience.

Sharing the same precision-engineered aluminum enclosure as the LS-2, the chassis is designed for superior rigidity and stability, helping isolate sensitive circuitry for optimum audio performance.

• Frequency Response: +/-0dB 10Hz to 40kHz at rated output (Balanced, 100k ohms load)
• THD+Noise: Less than .007% at 2V RMS BAL output
• Noise” -75dBV at Max Volume (99)
• Crosstalk: -82dB
• Gain:
  • 20 dB Balanced Output
  • 20 dB SE Output
• Input Impedance:
  • 25K ohms BAL and SE
• Output Impedance: 10 ohms BAL, 25 ohms SE
• Output Polarity:
  • Balanced: Non-inverting
  • SE: Inverting
• Power Requirements: 120VAC 60Hz 35W Maximum
• Standby: 4.2W
• Dimensions:
  • Width 19″ (48.26 cm)
  • Height 7″ (17.78 cm)
  • Depth 17.5″ (44.45 cm)
  • Weight: 33lbs (15kg) Net, 48lbs (21.8kg) Shipping