The HA 200 headphone amplifier
T+A’s first headphone amplifier is a groundbreaking new development that drives both the analog integrated ampsection and the transducer section, as well as the cabinet, to perfection. The analog section of the HA 200 is based on the unique T+A HV technology. Its high-performance output stages run at high quiescent current in Class A operation and can easily drive even the most difficult headphones.
Even the impedance of the three headphone outputs can be precisely adjusted to the headphones used and the individual sound preferences. The crossfeed function for creating a soundstage positioned in front of the head is available on request. The high-quality power supplies, one digital and one analog with 2 toroidal transformers, provide oversized power reserves.
Music reproduction in the highest perfection.
The digital section features T+A’s proprietary True 1-bit digital-to-analog converter, capable of an incredible DSD 1024 for bitstream, and T+A’s 32-bit/768 kHz Quadruple Converter for PCM. Like all of T+A’s current DACs, the new HA 200 is equipped with a fully optimized and completely separate decoding architecture for DSD and PCM, enabling the finest decoding of all digital formats.
The cabinet and material harmonize perfectly with the unique electronic. The HA 200 is significantly larger and heavier than other headphone amplifiers, but that’s not surprising considering more than 2300 components and the complex HV technology. All cabinet parts are made of a-magnetic aluminum, the front panel is even milled from a solid plate from the solid, as in the HV series.
Precise QMMP gauges and a large display provide important system information and accurately show operating conditions. The IR remote control FM8 controls the HA 200 in all functions. T+A has built the HA 200 to be uncompromising in every respect, without regard to cost, because it has only one goal: music reproduction of the highest perfection.
The integrated amphas a very decisive share in the overall result. That’s why T+A decided to design it according to the principles of the HV series: pure analog Class A design with ultra-fast and extremely linear MOS-FET transistors, no op-amps, no chips, and a separate 100-watt analog power supply. Even the crossfeed function is generated by an analog filter circuit.
The XLR and RCA inputs are the same as the HV series, and the preamp is designed to optimally feed the output stage. Gas-tight encapsulated gold contact relays take over the volume control and adjustable loudness function and bypass the tone control completely (flat) if desired, they are absolutely free of distortion and noise. Even after many years of operation, there are no contact problems due to corrosion, dust or aging.
By integrating the relays directly into the circuit, the signal paths are optimally short. The output stage was designed very elaborately due to the requirements on the part of different headphones. Normal speakers have impedances between 2 and 10 ohms, which is not critical, but headphones can have impedances between 10 and 1000 ohms, which is quite challenging.
At low impedance you need a high current, at high impedance the current is rather small, but the voltage should be high. Therefore, the analog section of the HA 200 was equipped with an elaborate, oversized power supply with two hard 50 watt transformers, so on the one hand it is extremely load stable and can effortlessly deliver high currents and on the other hand very high voltages are available.
The multitude of connection options requires a very complex control and display of the entire system. A clever combination of operating keys and menu control makes the HA 200 intuitive and easy to use. The two VU meters are precise display instruments (QPPM = Quasi Peak Programme Meter Type 1) that indicate the level of various parameters, just as in studio or measurement technology.
Levels at the D/A converter as well as at the amplifier can be displayed, such as input and output level, temperature or stream quality (can be used to check the frequency of the data stream or also the cable quality). The crisp display shows the selected operating modes such as output impedance, volume, data rate, type of oversampling filter or crossfeed. The brightness of the display, LEDs and VU meters is adjustable. With these, you can even adjust the color shade.
Since the HA 200 is also intended for professional use, the cabinet is particularly robust and solidly constructed. The heat sinks are made with an extruded profile, the front is milled from solid, the lid, bottom and back are made of aluminum plates.
High fitting accuracy and the tightest tolerances characterize this cabinet, while at the same time the design ensures homogeneous heat distribution and thus optimum operating conditions for the entire Electronic.
Inputs and outputs
To optimize the sound quality, different output impedances can be selected for each output (6.3 mm, 4.4 mm Pentaconn, XLR-4-pin), and crossfeed can also be activated. If you want to connect an additional stereo power amplifier (like the AMP 8) to drive speaker, the XLR 4-pin output can be used.
Undoubtedly, the HA 200 has the best digital input range in the world today, the USB-B inputs are based on the new high-resolution Thesycon chip that handles up to DSD 1024. AES/EBU and BNC are available as well as SP/DIF optical and coaxial. The Bluetooth input is equipped with AptX™ HD, and two HDMI inputs (stereo) and one output (ARC) are available as options. The extremely high quality of the inputs continues in the converter.
The proprietary T+A True 1-bit digital-to-analog converters, enabling an incredible DSD 1024 for bitstream, and the T+A Quadruple Converter with 32-bit/768 kHz for PCM, are state of the art and represent the limit of what is possible today. The digital section has its own power supply and is completely galvanically isolated from the analog section.
Although the main purpose of the HA 200 is to be an exceptional power amplifier, having such great flexibility on the input side is very helpful for different user profiles. Since the best DSD and PCM converters are used, the sound quality of the digital inputs is just as good as the analog ones.
- D/A converter: PCM: double differential quadruple, converter up to 32 bit/768 kHz
- DSD: T+A True 1-bit analog converter, native bitstream up to DSD 1024 (49.2 MHz)
- Digital inputs: USB audio input, AES-EBU, BNC, Coax, TOS-Link, HDMI (optional), USB Receiver UAC2 and UAC3 compliant
- Digital section: Separate PCM and DSD signal processing, optional “Non Oversampling” operation (NOS-DAC)
- Amplifier: Double Mono “State of the Art” discrete design in HV technology
- Pure Class A power amplifier
- 3 separately switchable outputs (Pentaconn, XLR, jack)
- Adjustable output impedance
- Special features: Complete galvanic isolation between digital and analog part