Preamplifiers — T+A SDX 3100 HV

The SDX 3100 HV is an accomplished reference streaming pre-DAC from T+A, part of the flagship High Voltage (HV) series, built with the same High Current mode previously reserved exclusively for the flagship M 40 HV monoblock amplifier. The SDX 3100 HV brings T+A's most storied German engineering to a comprehensive, streaming-and-conversion preamplification format.

Key specs that matter

Two balanced and one single-ended analogue inputs are provided, with two balanced and one single-ended outputs. Input impedance is 20,000 ohms balanced or 10,000 ohms single-ended, with output impedance at 50 ohms on both connections. At 170 x 460 x 460mm and 26kg, the SDX 3100 HV maintains a substantial preamplifier-and-DAC chassis reflecting T+A's most accomplished current HV-series engineering, with the High Current mode keeping downstream output stages constantly energised for extended class-A operation.

Sound and use context

Expect an accomplished, reference-tier streaming-and-conversion performance reflecting the High Current mode's constantly energised output stage, with this rare feature previously found only in T+A's flagship M 40 HV monoblock amplifier.

Pairing

T+A's own power-amplifier catalogue, particularly the M-series monoblocks compatible with High Current mode operation, offers natural, brand-coherent pairings.

Alternatives

T+A's own broader HV series offers related separates alternatives within the same considered high-voltage-topology engineering philosophy.