T+A Doubles Down on HV Power With Flagship Amp & Streaming DAC/Pre

T+A elektroakustik has taken the wraps off the A 3100 HV, the long-awaited successor to its highly regarded A 3000 HV power amplifier. The outgoing model spent more than a decade impressing fans, but T+A says the new amplifier is far more than a gentle refresh, with engineers making more than 270 changes and iterations in search of a fitting replacement.

The A 3100 HV retains the imposing stereo amplifier stance of its predecessor but adds a rear-panel-selectable High Current mode, a feature previously reserved for the M 40 HV mono amplifier. In this mode, the amplifier remains constantly energised, extending the true Class A operating region beyond 75 watts depending on loudspeaker load, while High Power mode remains available for those who want 500 watts of Class AB output.

T+A has also reworked monaural operation. Rather than simply bridging the channels, an approach that can increase distortion and reduce the lowest drivable impedance, the A 3100 HV parallels its outputs. The company says this delivers substantial power without the usual compromises associated with conventional bridged designs.

Under the hood, the power supply has been upgraded around a newly designed toroidal transformer. Hermetically sealed and fully enclosed in a magnetic shield, it is separated from the audio signal by a 10mm aluminium internal panel, keeping stray fields under control while supplying the current demanded by the amplifier’s new operating modes.

Transient speed was also high on the engineering agenda. T+A says the amplifier stores energy in twelve new low-ESR capacitors, allowing it to respond instantly when a demanding orchestral crescendo or deep synthetic bass line calls for sudden power.

The broader HV architecture has been refined, too, with true Class A operation, thermal stability, isolated voltage- and current-amplification stages, high-voltage circuit topologies, and non-magnetic construction all working together to preserve the brand’s familiar speed, resolution, and transparency. Crucially, T+A says the extra precision has not come at the expense of warmth or musical drama.

“Together, all these innovations set the stage for what we believe will be another epic lifecycle for our flagship stereo amplifier,” says T+A North America CEO Dave Nauber.

SDX 3100 HV Adds Streaming Brains to the Flagship Stack

Alongside the new power amplifier, T+A has announced the SDX 3100 HV, a reference-class streaming pre-amplifier DAC designed to sit at the heart of a long-term high-end system. The unit combines separate high-resolution DSD and PCM conversion, a fully integrated streaming client and a newly developed pre-amplifier section inside a solid aluminium chassis.

The SDX 3100 HV is built around the third generation of T+A’s Audiophile Streaming Architecture, known as ASA G3. It supports Amazon Music, TIDAL, Qobuz, Deezer, HighRes Audio, and connect services including Apple AirPlay, Spotify Connect, Qobuz Connect and TIDAL Connect, with Roon certification in progress; we are reliably informed. Native DSD playback from a network source or hard drive is also supported.

Digital processing is handled by T+A’s Path Separation Technology, which keeps DSD and PCM signals on dedicated routes. DSD is processed natively up to DSD 1024 through a True 1-Bit converter, while PCM signals pass through a Quadruple PCM converter using four 32-bit Burr-Brown chips with eight channels.

Jitter control is achieved with a De-Jitter Masterclock system, which we’re told uses two Femto crystal oscillators and multi-stage filtering to decouple the input signal from digital interference. On the analogue side, the HV pre-amplifier architecture employs a fully symmetrical double-mono design to maximise channel separation and preserve dynamic headroom, so says T+A.

“With the SDX 3100 HV, our goal is to push the boundaries of what is technically possible,” explains Jörg Küpper, Director of R&D at T+A. “Our Path Separation Technology ensures that DSD and PCM signals are each routed through optimised signal paths. Native DSD processing up to DSD 1024 enables unadulterated playback without any conversion.”

The SDX 3100 HV also introduces a fully analogue tone control module, allowing you to adjust bass and treble without resorting to digital signal processing. T+A says the module allows both level and corner-frequency adjustments, with separate settings for each channel if required.

For vinyl listeners, the company’s HV phono module is now available as a plug-in for the SDX 3100 HV. Both moving-magnet and moving-coil variants are offered, giving the streaming DAC a route into analogue replay without needing a separate phono stage.

The T+A A 3100 HV and SDX 3100 HV are available in silver or titanium, priced at US$29,900 and US$44,900, respectively, with the optional phono module priced at US$2,190.

For more information visit T+A elektroakustik