T+A HiFi - PA 3100 HV Integrated Amplifier 2022


This is a brand new T+A HiFi - PA 3100 HV Integrated Amplifier.

Complete as it left the factory in Germany.

Comes with a full factory warranty as SkyFi is an authorized dealer, and free installation up to 50 miles from 07452.

More from T+A:

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.

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.

The front panel is no less than 40 mm thick to provide outstanding shielding, and is machined from solid. All the electronic control circuitry is housed in a deeply inset compartment in this panel, which also bears on its front face the bright, dimmable glass VFD screen with its zero-wear sensor buttons.

The rotary source select and volume control knobs take the form of precision incremental encoders running in needle roller bearings, which give a uniquely satisfying sensation when operated.


Pre-amplifier stage

Frequency response + 0 / – 3 dB
0,5 Hz –300 kHz

Signal / noise ratio
105 / 110 dB

Total harmonic distortion
< 0,001%

< 0,001 %

Channel separation
> 90 dB

Nominal input sensitivity High level (RCA)
7 x 250 mVeff ... 6 Veff / 20 kOhms

Nominal input sensitivity Balanced (XLR)
4 x 500 mVeff ... 12 Veff / 5 kOhms


50 Ohms

1 x Recorder
250 mVeff / 100 Ohms

nom 1 Veff, max 9,5 Veff / 50 Ohms

nom 1,45 Veff, max 19,6 Veff / 50 Ohms

Output stage

RMS output per channel into 8 Ohms
300 Watts

RMS output per channel into 4 Ohms
500 Watts

Peak output into 8 Ohms
380 Watts

Peak output into 4 Ohms
700 Watts

Power bandwith
1 Hz – 150 kHz

Frequency response + 0 / – 3 dB
0,5 Hz – 180 kHz

Slew rate
60 V/µs

Damping factor
> 65

Signal / noise ratio
> 115 dB

Total harmonic distortion
< 0,03 %

Reservoir capacity
120000 µF

110 V/60 Hz or 220/240 V/50 Hz

< 0,5 W

Remote control
F 3001

Trigger input +5 ... 20V for external switching-on
Input 4 can be configured in surround mode
(Surround pass-through)
connectivity for additional PS 3000 HV
LAN connector for home-automation systems

Optional Accessories
PS 3000 HV Power Supply | PH HV MM oder MC phono module | APM signal processor module | Power Three HD (Carbon) | Power Bar | Audio Quad (Carbon) | Speaker Hex (Carbon) HV-Individual finish (Individual colours on request)| IP control

Dimensions (H x W x D)
7" x 18.11" x 18.11"
(17 x 46 x 46 cm)

84 lbs
(38 kg)

Case: silver laquer 47 or titanium laquer 64
Heat sink: black 42

The SkyFi Testing Process for Integrated Amplifiers:

We start with a visual inspection of all internal components to make sure there are no signs of stress or aging. Capacitors are checked for telltale sings of bulging or leaking, resistors are checked for signs of overheating or cracking, and transistors are checked for signs of stress or damage.

We then power up the unit carefully and run a simple 1k sine wave while monitoring the output on an oscilloscope for signs of distortion or noise. Finally, we run the amplifier to its full rated power into the appropriate resistive load provided by our Sencore amplifier tester. If there is an issue, it will usually be noticeable at this point. If everything reads clean, we will often test for THD (Total Harmonic Distortion) measured by our Keithley distortion meter, and compare it against the original manufacturers specifications. The amplifier then remains powered on to "burn in" on our test bench for a few hours to make sure there are no heat related issues. If there are balanced inputs available they will be also be tested.

Final testing involves pushing actual music thorough the amplifier. We've learned over time that some issues are only noticeable to a trained ear while listening to familiar source material. Our test bench has reference vintage KEF speakers that we're very familiar with which quickly reveal any discrepancies. Some amplifiers will then move into our listening room where they are tested with our in-house reference speakers of choice.

Please click here for detailed specifics regarding our specialized packing process that separates us from the rest.



Original Box








Physical Condition

10 - New

Working Condition

 10 - New

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