A 3100 HV Power Amplifier By T+A HiFi

The A 3100 HV from T+A is a high-performance power amplifier designed to complement premium preamplifiers like the T+A P 3100 HV, delivering exceptional sound quality, precise control, and outstanding power. It operates as a stereo amplifier but can also be configured in mono mode, effectively using separate amplifiers for each channel to double current output and maximize pure Class-A performance—offering a level of sonic detail and dynamic range that rivals more expensive models.

By separating preamplifier and power amplifier functions, the design ensures optimal circuit and mechanical engineering. The preamplifier handles delicate low-level signals with minimal interference, while the power amplifier focuses on high-current delivery with stable voltage and exceptional dynamic control.

The amplifier’s key components—including the power circuit, output stages, and mains supply—are housed in shielded compartments to minimize interference. Voltage and current amplification stages are located on isolated circuit boards, and galvanic separation eliminates feedback from speaker currents, preserving pristine audio fidelity.

The advanced amplifier design features a broad-band, highly linear differential cascode stage and a Class-A large-signal output, using MOSFET drivers and thermally tracked bipolar transistors for consistent, distortion-free performance. All power transistors are monitored for temperature, ensuring stable operation and precise sound even under demanding loads.

Full symmetry in all components reduces magnetic stray fields and electromagnetic feedback, further protecting signal integrity. High-quality speaker terminals, machined from solid brass and rhodium-plated, provide reliable, corrosion-resistant connections for optimum conductivity.

For those seeking maximum performance, the amplifier can be paired with the optional T+A PS 3100 HV external power supply, enhancing voltage and current delivery for an even more dynamic and refined listening experience.

T+A A 3100 HV Power Amplifier

Experience reference-level amplification with the T+A A 3100 HV, a premium high-performance power amplifier engineered for uncompromising audio reproduction. Designed exclusively as a dedicated power amplifier, it combines advanced HV technology, exceptional power reserves, and precision engineering to deliver remarkable clarity, dynamics, and musical realism.

Pure Power Amplifier Design

The A 3100 HV features a dedicated power amplifier architecture with complete separation between the preamplifier and power amplifier sections. This design minimizes thermal and electromagnetic interference, helping preserve signal purity and ensuring exceptional sonic performance.

Refined Through Continuous Innovation

Built upon more than a decade of expertise from the acclaimed A 3000 HV platform, the A 3100 HV incorporates extensive engineering refinements. Updated internal architecture, next-generation components, optimized PCB layouts, and over 270 design improvements contribute to enhanced performance, reliability, and efficiency.

Advanced HV (High Voltage) Technology

T+A’s proprietary HV circuit technology operates at exceptionally high voltages, enabling outstanding linearity, an extremely wide dynamic range, and remarkably low distortion. The result is a natural, transparent, and highly detailed listening experience with effortless musical dynamics.

High-Performance Power Supply

At the heart of the amplifier is a newly developed high-performance toroidal transformer, hermetically sealed and magnetically shielded to suppress stray magnetic fields. This precision-engineered power supply delivers clean, stable energy while protecting the sensitive audio circuitry from unwanted interference.

High Current Mode – Pure Class A Performance

For listeners seeking the highest level of refinement, High Current Mode keeps the output transistors continuously energized, allowing the amplifier to operate in true Class A mode up to approximately 75 watts. This eliminates switching delays during signal peaks, resulting in faster transient response, exceptional detail, and effortless musical expression.

High Power Mode – Exceptional Driving Capability

When maximum output is required, High Power Mode delivers up to 500 watts of Class AB power, providing the authority needed to drive demanding loudspeakers with confidence. For even greater performance, the amplifier can be expanded with an optional external power supply.

Flexible Stereo or Mono Operation

Stereo Mode

• Delivers outstanding stability and neutrality for high-end stereo systems.
• Maintains consistent performance across a wide range of loudspeaker loads.

Mono Configuration

• Can be configured as a high-performance monoblock amplifier.
• Instead of conventional bridged operation, the amplifier employs a parallel output configuration, increasing current delivery while avoiding the higher distortion and reduced load capability commonly associated with bridged designs.
• The result is exceptional power delivery with uncompromised sound quality.

Key Features

• Dedicated high-performance power amplifier design
• T+A proprietary High Voltage (HV) amplifier technology
• Advanced magnetically shielded toroidal transformer
• True Class A operation up to approximately 75 watts in High Current Mode
• Up to 500 watts of Class AB power in High Power Mode
• Stereo or monoblock operation for maximum system flexibility
• Over 270 engineering refinements compared to the previous generation
• Optimized thermal management and chassis construction for long-term performance

The T+A A 3100 HV is an exceptional choice for discerning audiophiles seeking world-class amplification, outstanding control, and uncompromising musical accuracy in a premium high-end audio system.

Steve Huff (YouTube) – (HV 3100 Integrated Review)
https://www.stevehuffphoto.com/2025/01/14/the-ta-pa-3100-hv-integrated-amplifier-review-worlds-best/

“I had very high expectations for the T+A PA 3100 HV, with thoughts of it for years and years, and it still managed to impress me more than I could have imagined.”

Future Audiophile
“This amp simply delivers—and does so by creating a very engaging sonic picture through its clarity, accuracy, dynamics, and bass performance. So much so that I have made the A 3000 HV amp and the matching P3100 HV stereo preamp my new reference electronics, a choice that I expect will bring me years of musical satisfaction.”

https://futureaudiophile.com/ta-elektroakustik-a-3000-hv-power-amplifier-reviewed

“T+A’s ‘no compromise’ HV series components are designed for the luxury audiophile market. In that context, this latest amp combo is sensational value. We’ve said this so often of T+A’s separates there’s a danger of it becoming tedious: if they were made by a boutique audio manufacturer they’d come with price tags two or even three times larger. Little wonder the German company is selling them hand over fist.”

https://reviewtechgame.blogspot.com/2014/07/ta-p3000a3000ps3000hv-prepower.html

Output stage
All measurements at 120 / 240 V mains voltage

• RMS output per channel stereo mode :
  • into 8 Ohms: 300 Watts
  • into 4 Ohms: 500 Watts
• Peak output per channel stereo mode :
  • into 8 Ohms: 380 Watts
  • into 4 Ohms: 700 Watts
• RMS output Mono mode :
  • into 8 Ohms: 380 Watts
  • into 4 Ohms: 650 Watts
• Peak output Mono mode :
  • into 8 Ohms: 430 Watts
  • into 4 Ohms: 800 Watts
  • Power bandwidth: 1 Hz – 150 kHz
  • Frequency response + 0 / – 3 dB : 0,5 Hz – 180 kHz
  • Slew rate: 60 V/?s
  • Damping factor : > 65
  • Signal / noise ratio : > 115 dB
  • Total harmonic distortion : < 0,03 %
  • Reservoir capacity: 120000 ?F
• Mains / Accessories / Dimensions :
  • Mains : 110-120 V/60 Hz oder 220-240 V/50 Hz / 1500 W
  • Standby : < 0,5 W
  • Features: Trigger input +5 … 20V for external switching-on
  • Optional Accessories :
    PS 3100 HV Power Supply | Power Three HD (Carbon) | Power Bar | Audio Quad (Carbon) | Speaker Hex (Carbon) HV-Individual finish (Individual colors on request)| IP control
  • Dimensions (H x W x D) : 17 x 46 x 46 cm
  • Weight : 38 kg
  • Finishes : Case: silver laquer 47 or titanium laquer 64, heat sink: black 42
  • Technical modifications reserved

A 3000 HV User manual
A 3000 HV Literature