T+A PA 3100 HV

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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.

» Tekniske data

Pre-ampli er stage
Frequency response + 0/ – 3 dB 0,5 Hz – 300 kHz
Signal / noise ratio 105 / 110 dB
Total harmonic distortion < 0,001%
Intermodulation < 0,001 %
Channel separation > 90 dB
Nominal input sensitivity
High Level (RCA) 7 x 250 mVeff ... 6 Veff / 20 kOhms
Balanced (XLR) 4 x 500 mVeff ... 12 Veff / 5 kOhms
Outputs *
Headphones 50 Ohms
1 x Recorder 250 mVeff / 100 Ohms
PRE out RCA nom 1 Veff, max 9,5 Veff / 50 Ohms
PRE out XLR nom 1,45 Veff, max 19,6 Veff / 50 Ohms
Output stage
RMS output per channel 8 Ohms 300 Watts
4 Ohms 500 Watts
Peak output 8 Ohms 380 Watts
Peak output 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
Mains110 V/60 Hz or 220/240 V/50 Hz 1500 W
Standby < 0,5 W
Features Trigger input +5 ... 20V for external switching-on
Input 4 can be con gured in surround mode
(Surround pass-through)
connectivity for additional PS 3000 HV
LAN connector for home-automation systems
Dimensions (H x W x D), Weight 17x46x46 cm (6,7x18,1x18,1“), 38 kg (83,8 lbs)
Finishes case: silver laquer 47 or titanium laquer 64,
heat sink: black 42
Remote control F 3001

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