T+A PA 2500 R
The Integrated Amplifier
The amplifier is effortlessly capable of controlling speakers which are extremely critical in terms of phase and impedance.
Power supply
The quality of any output stage is determined to a very great extent by the mains power supply as well as the circuit topology.
Mains power supply units must be as stable and resilient as possible, to ensure that the voltage they generate does not collapse even when very high peaks are encountered.
In conventional equipment this requires very large transformers, but the limited space available in the low-profile R-series machines spurred on our engineers to develop an ingenious alternative solution: a regulated high-frequency sine-wave mains power supply with generous reservoir capacity, capable of delivering up to 1200 Watts without problem.
The mains power supply can deliver very large quantities of current extremely quickly, even when the gradient of the peak signals is steep.
Their experience in building amplifiers over a period of thirty years has taught them the importance of the quality of audiophile modules for the final outcome in terms of sound quality, and that is why they choose their components with great care and then select them according to strict criteria, to ensure optimum characteristics for each specific application.
Connections
T+A use low-loss mica capacitors with silver electrodes, zero-induction resistors, precision low-noise audio resistors, and nickel-free gold- or rhodium plated terminals specially manufactured for T+A.
Many of these components were developed for military applications, and therefore fulfil exacting requirements in terms of quality and durability.
Another in-house development for the latest R-series is a completely new and very fast data bus for data exchange between the devices, which makes it possible to control a whole system with a single remote control handset.
Alternatively, if the system includes an MP 2000 R, the equipment can be controlled using the T+A App for iOS or Android.
Both amplifiers are equipped with a sophisticated protective circuit which is situated outside the signal path, and therefore cannot possibly have any adverse effect on sound quality.
The protective circuit constantly compares the input signal before the output stage with the output signal, and instantaneously switches off the output relays if it detects the slightest deviation (clipping, distortion, etc.).
The protective circuit is also triggered if overheating occurs, or if a short-circuit is present at the outputs.
All the electronic circuitry for controlling the machines is recessed into the solid aluminum front profile, where the shielding effect is outstanding.
The front panel features a bright, dimmable screen (VFD) and control knobs with variable lighting.
Specifications T+A PA 2500 R
Pre-amplifier stage
Frequency response + 0 / − 3 dB
0,5 Hz – 300 kHz
Signal / noise ratio, unweighted / A-weighted
105 / 109 dB
Total harmonic distortion/Intermodulation
< 0,001 % / < 0,001 %
Channel separation
> 90 dB
Loudness
Switchable, variable to suit loudspeaker efficiency
Tone controls
Bass
Treble
Switchable, channel-separate
−6 … +8 dB
−6 … +8 dB
Nominal input sensitivity
High level (RCA)
4 × 250 mV … 4 Veff/20 kOhms
Balanced (XLR)
3 × 500 mV … 8 Veff/5 kOhms
Phono-MM (optional*)
*Phono module replaces one high-level input
1 – 5 mV,
16 Capacitances
Phono-MC (optional*)
*Phono module replaces one high-level input
60 – 1000 µV,
16 Impedances
Outputs
Headphone
50 Ohms
PRE out RCA
Nom 1 Veff, Max 9,5 Veff, 75 Ohms
PRE out XLR
Nom 1,45 Veff, Max 19,6 Veff, 75 Ohms
Output stage
Nominal output per channel
into 8 Ohms 140 Watts
into 4 Ohms 280 Watts
into 2 Ohms 560 Watts
Frequency response + 0/– 3 dB
1 Hz – 150 kHz
Slew rate
60 V/µs
Damping factor
> 65
Total harmonic distortion
< 0,02 %
Reservoir capacity
120000 µF
Mains / Accessories / Dimensions
Control interface
R2-Link
Remote control
SRC 1
Mains connection
100 – 120 V or 200 – 240 V, 50 – 60 Hz
Max. 2000 Watt
Standby
< 0,5 W
Additional features
Trigger input +5V … 20V via adapter plug for remote power-on
Input 3 (symmetrical) or 5 (asymmetrical) can be configured as Surround Pass Through
Optional Accessories
PHE-P/PA R MM or MC phono content_default | Power Three HD (Carbon) | Power Bar | Audio Quad (Carbon) | Speaker Hex (Carbon)
Dimensions (H x W x D)
16,5 × 46 × 40,5 cm
Weight
14,5 kg
Finishes
Silver anodised aluminium, black anodised aluminium, brushed
