LS2 vs LS-3b
The LS-3b's output impedance is 250Ω against the LS2's 200Ω. Both share signal-to-noise (100 dB), thd (0.010%), and output voltage (2.0V RMS).
AI-generated product photo — not official manufacturer imagery.
AmplifiersPre-AmplifiersTube AmplifiersPhono Pre-Amps
About the LS2
The Audio Research LS-2 is a high-performance tube preamplifier designed for serious two-channel audio systems. It uses a single Class-A gain stage with dual 6H30 triodes in a cathode follower topology, eliminating solid-state devices from the signal path for pure, transparent sound reproduction. Key features include a full touchscreen interface for balance, input labeling, and display options; 4 single-ended RCA inputs and 2 balanced XLR inputs; user-installable optional phono card (MM/MC with 42dB/62dB gain) and DAC card (USB, coaxial, optical); machined metal remote control; and handcrafted construction in Minnesota. It delivers warm, rich audio with exceptional clarity, dynamics, and harmonic texture, suitable for integration into high-end systems.
Specifications
Power Specifications
Amplification power output and characteristics
- Amplifier Class
- A
- Input Impedance
- 50000Ω
Analog Output
Analog signal output specifications
- THD
- 0.010%
- SNR
- 100 dB
- Output Voltage
- 2.0V RMS
- Output Impedance
- 200Ω
- Max Output Voltage
- 30.0V RMS
Phono Preamplifier
Phono stage specifications
- MM Gain
- 42 dB
- HOMC Gain
- 62 dB
Connectivity
Input and output connections
- Bluetooth
- No
- Wi-Fi
- No
- Ethernet
- No
- Digital Inputs
- USB, Optical, Coax
- Analog Inputs
- RCA, XLR
- Analog Outputs
- Pre out, Tape out
Physical Dimensions
Size, weight, and appearance
- Dimensions
- 480 × 134 × 260 mm (W × H × D)
- Weight
- 5.9 kg (13 lbs)
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions