A 200 Stereo Power Amplifier By T+A HiFi

In designing the A 200 output stage, T+A’s goal was to combine maximum amplifier power with audiophile sound characteristics. This means 250 Watts of continuous power per channel that does not result in a reduction in terms of subtle detail, resolution, and fine dynamics. Its heatsinks are both a technical necessity and a design statement: they show off every Watt of power in impressive style as well as ensure efficient heat dispersion – even under maximum load. The A 200 output stage was developed with the aim of functioning either as a potent complement to an existing system or as the high-performance end of a perfectly matched chain of specialized audiophile devices in combination with the Series 200.

T+A only believes in power when it can be used with efficiency and precision. In T+A’s search to achieve the optimum blend of sound quality, power, and efficiency, the company developed a completely new circuit topology that combines T+A’s unique HV and High-Frequency sine-wave mains power supply technology with that of the PURIFI Eigentakt™ output stages. By this means, T+A succeeded in converting raw power into unsurpassed audiophile performance. All circuits and circuit boards are designed and executed by T+A’s own development team, and the PURIFI modules are implemented within them. The damping factor of the A 200 can be reduced if a warmer or softer sound image is desired in combination with particular loudspeakers.

Output Stage

The A 200 Class D output stages incorporate PURIFI Eigentakt™ technology. This platform, developed by the Danish technology company, is currently the world’s leading fundamental design for Class D output stages, as it eradicates the disadvantages of the previous generation of digital amplifiers. Until now digital amplifier designs were limited by their high dependence on the impedance of the loudspeakers connected to the system, by distortion in the output signal, by phase noise, and increased distortion at high power levels. In contrast, the outstanding feature of this new circuit design is its outstanding measured data, making it the obvious choice for audiophile applications:

• Extremely low distortion factor and intermodulation distortion at all power levels
• Extraordinarily low noise
• High damping factor
• Clean clipping
• Low losses, high efficiency
• Totally linear frequency response up to 60 kHz
• Completely loudspeaker-load independent characteristics (see measured curves into 4 Ohms and without loudspeaker-load)

Mains Section

In spite of their advantage in terms of efficiency, conventional switching amplifiers have an inherent drawback: they generate interference in the form of induced interference, which has a consistently adverse effect on sound quality. T+A’s response to this is to employ its High-Frequency sine-wave mains sections: their pure sine-wave output and higher frequency – more than twice as high as conventional mains sections – effectively eradicate this interference. The final trace of induced interference is eliminated by the intelligent recharging of the T+A reservoir capacitors fitted to the units. Over many years of development, T+A engineers succeeded in developing capacitors that recharge 100,000 times per second – 2,000 times faster than conventional capacitors. This is necessary in order to ensure that they respond to extremely brief signal spikes, and are always able to deliver the correct quantity of electrical energy. T+A’s sine-wave mains sections are “hard” units, i.e. they do not collapse even under the most severe load; they provide the output stages with absolutely constant voltage.

Intelligent Safe Control

T+A’s Intelligent Safe Control (ISC) is comparable to the ABS of a sports car: the micro-controller uses numerous sensors to provide constant monitoring of the temperature, load, or clipping states and intervenes in an intelligent manner in order to return the parameters to their permissible range.

HV Circuit Topology

T+A’s HV circuit technology is unique in the world and is employed in the voltage amplifier stage. The high operating voltage resulting from the overall circuit design ensures extremely linear reproduction of the audio signals and provides totally natural imaging and dynamics from every recording – without compromise, and without limitation. The technology also eliminates harsh feedback, to which audio sound is very sensitive.

Frequency Response

The frequency response is totally linear up to 60 kHz and completely independent of the connected loudspeaker. The measured curves show that there is no difference in frequency response between a 4 Ohms loudspeaker load and no loudspeaker load.

The Absolute Sound — Editor’s Choice Award!
“Considering the build-quality, features, and, most importantly, the unbelievable performance that T+A has squeezed into these petite chassis, they’re actually quite the deal. You can’t touch their price with most large separates, and the full stack is even at the low end of the $20–$50k range”

https://jaguaraudio.com/wp-content/uploads/2023/02/The_Absolute_Sound_Series_200_Review.pdf

HiFi News
While avoiding any lame jokes about ‘German engineering’, I’m bound to say there’s a wonderful sense of synergy – and not just in build and style – between these two T+A components. The A 200 is a mature-sounding power amp with excellent driving ability, and a perfect partner for the DAC 200’s refined, insightful and light-footed approach. Yes, there’s no networking, but the Series 200 has this covered elsewhere…

https://www.hifinews.com/content/ta-dac-200a-200-dacpreamp-power-amp

Output Stage

• Nominal power per channel : 250 Watts @ 4 Ohms, 125 Watts @ 8 Ohms
• Frequency response + 0 / − 3 dB : 1 Hz – 60 kHz
• Signal-to-noise ratio : 113 dB
• THD  /  Intermodulation : < 0,002 % / < 0,002 %
• Channel separation : > 103 dB
• Damping factor : > 800 / DF LO > 70
• Gain factor : 37,4 (31,4 dB)
• Input sensitivity nominal : High level (RCA) 800 mVeff / 5,8 kOhms, Balanced (XLR) 1,6 Veff / 20 kOhms

Mains / Accessories / Dimensions

• Mains : 220 – 240 V, 50 – 60 Hz
• Power consumption : max. 600 Watts, 25 Watts while powered on and idling with no signal
• Standby : < 0,5 Watts
• Dimensions (H × W× D) : 10 × 32 × 34 cm,, 4 x 12.6 x 13.4 inch
• Accessories : Power cord, E2-Link-cable
• Weight : 5 kg, 11 lbs
• Finishes : Alu silver anodized (43), Alu schwarz anodized (42)

Technical modifications reserved

User manual A 200