Preamplifiers — Audio Research LS-3

The LS-3 is a preamplifier from Audio Research, sharing the LS-2's connectivity with somewhat higher gain. The LS-3 brings Audio Research's considered engineering to dedicated line-level signal control.

Key specs that matter

Two balanced XLR inputs and four single-ended inputs are provided, matching the LS-2. Gain is 20dBu - higher than the LS-2's 12dBu. Input impedance is 25,000 ohms on both connections, matching. Output impedance is 10 ohms balanced or 25 ohms single-ended, also matching. Frequency response spans 10Hz to 40,000Hz within plus-or-minus 3dB. Signal-to-noise ratio is 75dB unweighted, with total harmonic distortion plus noise under 0.007%. At 482.6 x 177.8 x 444.5mm and 15kg, the LS-3 maintains a manageable preamplifier chassis reflecting Audio Research's considered American engineering standards.

Sound and use context

Expect the accurate, richly detailed character Audio Research's broader storied American catalogue is celebrated for, with the somewhat higher 20dBu gain over the LS-2 suiting a wider variety of source components.

Pairing

Audio Research's own power amplifier catalogue offers natural, brand-coherent pairings for a coherently voiced, entirely Audio Research-based system.

Alternatives

Audio Research's own LS-2 offers a more modest-gain alternative within the same broader preamplifier catalogue.