T+A A 3100 HV – Flagship Power Amplifier with High Current and High Power Modes

T+A has expanded its flagship HV series of electronic components with the new A 3100 HV stereo power amplifier. The model replaces the A 3000 HV, which remained in production for more than ten years. At the same time, the manufacturer introduced the T+A SDX 3100 HV multifunction preamplifier, equipped with an integrated DAC and a network platform for music streaming.

Despite its visual similarity to its predecessor, the T+A A 3100 HV power amplifier is a comprehensively redesigned component. According to T+A, its engineers made more than 270 changes to the construction. The upgrades affect the amplifier stages, power supply, internal layout, thermal stabilization and the operating principles of the device under different loads.

One of the key innovations is the High Current mode, previously used only in the flagship T+A M 40 HV monoblock amplifiers. It is activated using a switch on the rear panel and keeps the output stage under constant voltage. Depending on the impedance and sensitivity of the connected loudspeakers, the amplifier is capable of operating in Class A at power levels of up to 75 watts.

For situations requiring the maximum possible power reserve, a High Power mode is also provided. In this mode, the T+A A 3100 HV operates in Class AB and can deliver up to 500 watts. This allows the user to choose between an extended Class A operating range and increased output power for demanding or low-sensitivity loudspeakers.

The developers also paid particular attention to mono operation. Instead of using a conventional bridged configuration, in which the channels operate in opposite phase, the output stages of the A 3100 HV are connected in parallel. T+A states that this arrangement increases current delivery and output power without compromising distortion performance or imposing additional limitations when driving low-impedance loudspeakers.

The power supply has also been substantially redesigned. The new toroidal transformer is housed in a sealed enclosure and features comprehensive magnetic shielding. A 10 mm-thick aluminium partition is installed between the power and signal sections, reducing the influence of electromagnetic interference on the sensitive audio circuitry.

Energy storage is provided by twelve new capacitors with low equivalent series resistance. Their purpose is to enable the amplifier to respond quickly to short signal peaks and maintain control over the loudspeakers during sudden dynamic changes. The manufacturer emphasizes that the substantial energy reserve is particularly important when reproducing large-scale orchestral passages and powerful low-frequency impulses.

The company’s proprietary high-voltage HV architecture has also been further developed. The design employs separate voltage and current amplification stages, thermally stabilized circuits, high-voltage circuitry and non-magnetic materials. According to T+A, the A 3100 HV amplifier combines fast response, transparency and high detail retrieval with a rich and expressive sound character.

The T+A A 3100 HV power amplifier will be available in silver and titanium finishes. The same finish options will also be offered for the T+A SDX 3100 HV preamplifier. The recommended retail price of the model is $29,900.