T A PA 3100 HV Integrated Amplifier – Key Features The T A PA 3100 is a high-end integrated amplifier from T A’s flagship HV series, combining precision German engineering with powerful, low-distortion amplification for demanding audiophiles. Built to drive the most challenging speaker loads, it offers exceptional dynamics, modularity, and control. Class AB integrated amplifier with HV technologyHigh-voltage (HV) circuit design allows ultra-low distortion and a dynamic range up to 60 Vpp without compression or coloration. 2 × 300 W @ 4Ω / 2 × 170 W @ 8ΩProvides stable, effortless power delivery across a wide range of speaker impedances. Dual-mono architectureSeparates left and right channels for enhanced stereo imaging, channel separation, and noise isolation. Modular design with upgrade optionsCompatible with optional phono modules (MM/MC), DAC modules, and the PS 3000 HV external power supply for expanded performance. Precision analog volume controlBuilt with relay-switched discrete resistors for perfect channel balance, no signal degradation, and silent operation. Wide bandwidth and ultra-low distortionFrequency response from 0.5 Hz to 300 kHz and THD below 0.001% ensure transparent, uncolored audio. Flexible system integrationIncludes 6 analog inputs (XLR/RCA), pre-outs, power amp-in, trigger control, and LAN for home automation compatibility. Premium construction and designFull-metal chassis with titanium lacquer and black heat sinks, plus VU meters, remote control, and future-ready connectivity. The T A PA 3100 integrated amplifier is designed to deliver reference-grade performance, precision control, and unmatched expandability for high-end audio systems. The Integrated Amplifier The PA 3100 HV is a further development of the PA 3000 HV, and most of its sub-assemblies are identical. The immediately obvious difference is the pair of VU meters in the front panel, which display the power generated per channel in logarithmic form in Watts into 4 Ohms. A revision of the pre-amplifier section (D.C. coupling) has brought an additional improvement in sound quality. A further development is the redesigned analogue mains section and voltage power supply, which is similar to that of the A 3000 HV. This makes it possible to connect the supplementary PS 3000 HV mains section in order to gain a further increase in stability and performance of the power supply system as a whole. The additional unit provides an extra 1800 Watt of supply power, enabling the system to control even the most difficult loudspeakers without effort, so that they can unfold the best possible sound quality. As an option the PA 3000 HV and PA 3100 HV can also be fitted with High-End phono pre-amplifier modules which feature different circuit topologies to suit MM or MC systems. It is also possible to install the analogue signal processor module which has been developed for the P 3000 HV to provide channel-separate tone and loudness functions. The all-metal F3001 infra-red remote control handset is supplied as standard. Circuit Topology As with the P 3000 HV, the circuit topology is based on a differential cascode amplifier with individually selected audio J-FET transistors, and stages of completely discrete construction without op-amps (operational amplifiers). Virtually no overall negative feedback is required due to this circuit arrangement and the quality of the components employed. The high operating voltage of HV technology is the key to excellent linearity combined with extremely wide dynamic range: signals up to 60 Vss can be processed without distortion. In the HV series the signal switching and adjusting functions are carried out by encapsulated gas-tight gold-contact relays, which are totally immune to contact problems due to corrosion, dust, etc., and do not suffer from ageing effects even after many years of operation. The pre-amplifier even employs bi-stable relays, which require no permanent coil current, and this in turn eliminates any adverse inductive effect on the audio signals. The direct integration of the relays into the circuit minimises the signal paths, and connecting cables – as required for conventional volume potentiometers – are no longer necessary. The volume control is assembled from discrete precision resistors and gold-contact relays. The result is totally precise channel matching, devoid of distortion and hiss.
