T+A

PA 2500 R

Name: PA 2500 R
Brand: T+A
SKU: T-A-PA-2500-R

Integrated amplifier

Series R Series

At a glance

All specifications

Weight: 14.5 kg
Channel separation: > 90 dB
Tone controls: Switchable, channel-separate
Bass: −6 … +8 dB
Treble: −6 … +8 dB
High level (RCA): 4 × 250 mV … 4 Veff/20 kOhms

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Features2
Downloads3
Awards and press7

Overview

Twice as tall, higher output power and even more connection facilities – the PA 2500 R exceeds the specification of the PA 2000 R in many areas, but its character in terms of sound quality is in no way inferior to its smaller sibling. This by no means goes without saying, because very powerful amplifiers often forfeit the finer points of dynamics and detail tracery. Our PA 2500 R integrated amplifier circumvents this danger: its basic circuit is the same as that of the PA 2000 R, and even the circuit board layouts are identical. However, its heat-sinks are twice the size, and the case accommodates two of our new high-performance mains power supply units, with the result that it can deliver more than 280 Watts of continuous power per channel into 4 Ohms loudspeakers. The amplifier is therefore effortlessly capable of controlling speakers which are extremely critical in terms of phase and impedance. The PA 2500 is even more powerful than the smaller machine, but retains exactly the same dynamism and cultured sound.

About T+A

Ever since 1978 our driving force has been curiosity. Our aim was to define the framework of the possible, and push its limits a little further each day, and that’s what formed the stone of this company. We always aspired to the creation of new findings rather than the exploitation of existing knowledge. We were determined to carve out our own advances, and not simply follow the progress of technology. Satisfying this goal requires our team of fifteen designers and developers to create every device in our headquarters in Herford. From the initial design, developing every single circuit board and finishing with the software code - the stage which brings all the component parts together to form a grand ensemble - our devices are built in Herford. They are permeated by the belief on which this company was founded, and which drives all of us forward every day. We don't build mass products, we build accoustic treasures, we build heartbeats, goosebumps and enthusiasm.

All T+A products

Features

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. Our experience in building amplifiers over a period of thirty years has taught us the importance of the quality of audiophile modules for the final outcome in terms of sound quality, and that is why we choose our components with great care and then select them according to strict criteria, to ensure optimum characteristics for each specific application.
Connections
We 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

Weight: 14.5 kg; Per unit, out of the box.
Model code: T-A-PA-2500-R; Quote it when you ask a specialist.

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: Switchable, channel-separate
Bass: −6 … +8 dB
Treble: −6 … +8 dB
High level (RCA): 4 × 250 mV … 4 Veff/20 kOhms
Balanced (XLR): 3 × 500 mV … 8 Veff/5 kOhms
Phono-MM (optional*): 1 – 5 mV,
*Phono module replaces one high-level input: 16 Capacitances
Phono-MC (optional*): 60 – 1000 µV,
*Phono module replaces one high-level input: 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 module | 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 (43), black anodised aluminium (42), brushed

Pre-amplifier stage

Nominal input sensitivity

Downloads

User manual PA 2500 RManual · English · PDF, 2.5 MB
Download
PA 2000 R User manual phono amplifierManual · English · PDF, 854 KB
Download
G 2000 R Catalogue R-SerieBrochure · English · PDF, 3.6 MB
Download

Awards and press

The T+A gear never lost its composure on anything I played through it. Whether at concert volume or quiet evening listening levels the character and presentation remained absolutely consistent, stable and musically expressive.
Sound Stage
The highboy integrated amp in T+A’s vaunted R series, the 140Wpc PA 2500 R is a dual-mono, fully balanced, high-voltage design with a Class AB output stage biased into Class A for the first 20–25 watts.
The Absolute Sound 3/2020 Editor´s Choice
However, the PA 2500 R and MP 2000 R exceeded my expectations by a wide margin. Even though they can be purchased individually, I consider them an iseparable partnership, compleating each other´s thoughts like identical twins would.
The absolute sound
mactechnews.de
Fidelity 26 07-08/2016
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