Preamplifiers — ModWright Instruments LS300

The LS300 is a preamplifier from ModWright Instruments, sitting above the LS 99 with an extraordinarily wide bandwidth and a distinctive separate power-supply configuration. The LS300 brings ModWright's most accomplished current engineering to line-stage preamplification.

Key specs that matter

Two balanced XLR inputs and three single-ended RCA inputs are provided, with two balanced and two single-ended outputs. Gain is 11dBu, matching the LS 99. Input impedance is 20k ohms on both connections, with output impedance at 100 ohms on both connections. Frequency response spans an extraordinary 20Hz to 100,000Hz within plus-or-minus 3dB. Signal-to-noise ratio (unweighted) reaches 115dB, with total harmonic distortion plus noise under 0.03%. At 431.8 x 114.3 x 317.5mm, weight totals 13.6kg for the main unit plus 7.71kg for the separate power supply - reflecting ModWright's considered approach to isolating sensitive circuitry from power-supply-related noise.

Sound and use context

Expect exceptionally clean signal handling reflecting the strong 115dB signal-to-noise figure, combined with genuine benefit from the separate power-supply isolation, representing ModWright's most accomplished current preamplifier engineering ambition.

Pairing

The comprehensive five-input connectivity comfortably accommodates a source-rich system, and ModWright's own PH 9.0 phono stage shares the brand's coherent engineering philosophy.

Alternatives

ModWright's own LS 99 offers a more compact single-chassis alternative within the same broader preamplifier catalogue.