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4-Channel DSP Installation Power Amplifier

  • Power: 4 x 250 W at 8 Ohm, 4 x 350 W at 4 Ohm
  • Frequency response: 20Hz – 20,000kHz
  • Class D power amplifier
  • Programming via USB (Windows)
  • Power switch on the front
  • 3 buttons on the front for preset switching
  • 3 rear contact inputs via screw terminal for preset switching
  • Inputs: 4 x XLR balanced
  • Outputs: 4 x Speaker Twist, 4 x 6.35 mm jack TRS Pre-Out
  • Dimensions (H x W x D): 482 x 339 x 44 mm
  • Type: 19" 1 U
  • Weight: 5.8 kg

Note: Not compatible with MacOS

  • Available since September 2023
  • Item number 555931
  • Sales Unit 1 piece(s)
  • EQ Yes
  • Delay Yes
  • Limiter Yes
  • Number of inputs 4
  • Number of outputs 4
  • Computer Remote Yes
  • RTA Connector No
  • Number of Rack Units 1
  • Channels 4
  • 2-Way Stereo Yes
  • Width in mm 482 mm
  • Depth in mm 339 mm
  • Output power at 100 V 0 W
  • Digital Yes
  • Height in mm 44 mm
  • Output power at 4 Ohms / Cannel 350 W
  • Rack Units 1 U
  • Weight 5,8 kg
  • Power (4 Ohms) per Channel 350 W
  • Class Class D
  • Input XLR Yes
  • Amp Class Class D
  • Link Out No
  • Output Speaker Twist Yes
  • DSP/Crossover Yes
  • Temperature controlled fan Yes
  • DSP / Crossover Yes
  • Width 482 mm
  • Depth 339 mm
  • Height 44 mm
5.555 kr
All prices incl. VAT
In stock
1

The affordable fixed-install power amp

The t.racks DSP 4x4 Amp 4.250 is a compact, lightweight four-channel Class D installation amplifier that delivers a powerful total output of 1,000W RMS at 8 ohms or 1,400W RMS at 4 ohms. Housed in a 19", one-unit rack design, it features balanced connections with a combination of XLR inputs, speaker twist outputs (amp outs) and TRS jacks (pre-outs), making it equally suited for both fixed and mobile installations. An integrated DSP enables precise signal processing and routing, operated effortlessly through a USB connection and the Windows-compatible software. Like every the t.racks product, the DSP 4x4 Amp combines reliability, flexibility, and impressive performance with outstanding value for money.

the t.racks DSP 4x4 Amp 4.250 power amplifier potentiometers

Pro tech for pocket change

The t.racks DSP 4x4 Amp 4.250 installation amplifier delivers ample power for smaller sound system applications while maintaining a compact footprint. Each of its four inputs features balanced XLR connectors, while the output section includes four amplified outputs with balanced speaker twist sockets and four additional pre-outs equipped with TRS jacks. Its Windows-compatible software provides access to a versatile routing matrix, allowing flexible input and output assignments. Every channel is equipped with a compressor/limiter to protect speakers, a gate for noise reduction, a delay for precise time alignment, and a fully adjustable EQ. The internal DSP operates at 32 bits, with signal conversion at 24 bits and 48kHz, ensuring clean, high-resolution processing. Completing its efficient design are three easily switchable presets – accessible either from the front panel or via rear contact inputs – alongside dedicated level controls for each channel, making the DSP 4x4 Amp 4.250 a compact yet highly capable fixed-install solution.

the t.racks DSP 4x4 Amp 4.250 buttons front panel

Switch at will

The DSP-controlled, four-channel power amplifier the t.racks DSP 4x4 Amp 4.250 offers an exceptionally handy feature: presets 01–03 can be accessed directly from the front panel at the touch of a button, eliminating the need for an external computer. These presets can also be switched effortlessly via the rear screw terminal, enabling a range of convenient applications. From typical PA tasks – such as selecting between tops with or without subwoofers – to controlling different room zones in fixed installations, the system adapts with ease. This functionality also allows flexible and individual level adjustments, ensuring smooth operation across a variety of setups and environments.

About the t.racks

The in-house brand the t.racks has been an integral part of the Thomann music store range since 1997. A wide range of different rack devices, effects, power distributors, and accessories appear under the t.racks name and prove that quality, reliability, and attractive pricing do not have to be mutually exclusive. Whether for home studios, the stage, or the rehearsal room – the t.racks offers a convincing and affordable solution for every situation.

Efficient sound system for stage and installation

The t.racks DSP 4x4 Amp 4.250 power amplifier is perfectly suited for both fixed installations and compact mobile sound systems. In venues such as cafés or pubs, it can power up to eight speakers with ease, while small stage setups can benefit from its ability to drive up to four subwoofers and four tops with a maximum output of 4×350 watts. When paired with four monitor speakers, the built-in DSP EQs offer precise and creative sound shaping options. Equipped with XLR inputs and speaker twist outputs, the amplifier also provides balanced jack sockets for unamplified DSP use, adding further flexibility, and in studio environments, the device proves equally valuable – ideal for multi-channel monitoring setups or other audio routing tasks. With its compact 19", one-unit housing, the DSP 4x4 Amp 4.250 integrates effortlessly into virtually any technical rack, combining versatility, efficiency, and professional performance in one streamlined design.

10 Customer ratings

4.3 / 5

handling

features

sound

quality

7 Reviews

GO
Small package-pro features
George O. 24.01.2024
This little package had us surprised by the features and performance it’s providing for such a small form factor. The DSP processing is very flexible and easy to use and to add to the flexibility the volume controls for each channel allows fast adjustments without needing to go through complex menus ,plus the quick access to different configurations through the other buttons makes it so much more efficient.
Overall a great choice for installing and other applications .
Con’s : 1. a bit loud fans
2. only speakon connection available for output
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F
Al di sopra delle aspettative
FrancoL 25.11.2024
Comprato per riutilizzare un mio vecchio impianto passivo bi-amplificabile, come back-up, è diventato il mio impianto principale grazie alla versatilità di questo amplificatore. Ottimo suono e facilità di programmazione. Un solo appunto: ventola un po' rumorosa che può farsi sentire in iccoli teatri o chiese. Per il resto, ultra soddisfatto!
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B
All in one
Basu978 20.09.2025
Ich habe mir diese Endstufe für DIY Projekte angeschafft. Allerdings nicht fürs Roading. Grundsätzlich sehr solide, der DSP ist von guter Qualität. Die Software ist absolut ok.
Da ich die Endstufe jedoch im Partykeller verwendet habe, waren mir die ungeregelten Lüfter doch zu laut. Hätte die sonst gerne behalten.
Auf jeden Fall klare Kaufempfehlung, wenn man aktiv trennen möchte, DIY bastelt und "Dampf" braucht. Die Lüfter bleiben aber laut...
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MT
Bellisimo ampli ! e che suono!
Manuel The duke 10.09.2024
Top per ogni suo aspetto . Sound ,proccesing,design e dimensioni/peso.
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