Beta Three DT4000 2-Channel Class D Power Amplifier

Beta Three DT4000 2-Channel Class D Power Amplifier – 2,500 W Per Channel for Passive PA Systems

The Beta Three DT4000 is a two-channel Class D power amplifier for driving passive PA loudspeakers in installed and portable sound systems. Its output specification is substantial: 1,500 W per channel into 8 ohms and 2,500 W per channel into 4 ohms, stereo, from a 2U rackmount chassis weighing 16.5 kg. That power class suits main front-of-house cabinets, demanding full-range boxes and subwoofer duties in medium to larger venues where a single amplifier is expected to carry a system without running near its limits.

Class D operation keeps the weight and heat manageable for an amplifier of this output. A high-capacity power supply and temperature-controlled dual fan cooling with an integrated air duct are designed to hold performance steady through long events, and the protection and limiting systems are there to keep both the amplifier and the connected speakers intact when a system is pushed.

Key features

• 1,500 W per channel into 8 ohms, 2,500 W per channel into 4 ohms
• Two-channel Class D amplifier in a 2U rackmount chassis
• Switchable input sensitivity: 0.775 V, 1 V or 32 dB gain
• Built-in limiter with two selectable limiting modes
• Signal to noise ratio above 105 dB, damping factor above 1,000
• XLR inputs and link outputs, NL4 speaker outputs

Power delivery and control of the speakers

A damping factor above 1,000 at 8 ohms indicates tight control over the loudspeaker cone, which matters most with large woofers reproducing kick drum and bass at high level. Distortion is rated below 0.1 percent at 1 kHz into 8 ohms, with intermodulation distortion below 0.5 percent, and the frequency response covers 20 Hz to 20 kHz. Three switchable input sensitivity settings let the amplifier sit correctly in systems whose processors and mixers output different nominal levels, so gain structure can be set properly instead of being compensated for at the faders.

Limiting and system protection

The DT4000 includes a limiting function designed to prevent output distortion even when the input level is too high, with two limiter modes to suit different speaker types. Input cascade switches allow the signal from one channel’s input to feed the adjacent channel, which simplifies wiring in larger racks where several amplifiers share the same feed. Independent volume knobs and clear status indicators on the front panel keep the amplifier’s operating state readable at a glance during a show, and the thermal management system controls fan speed by temperature rather than running at full speed continuously.

Connections and installation

Each channel has an XLR input and an XLR link output for daisy-chaining to further amplifiers, and speaker connection is by NL4 connectors, the locking standard for professional PA cabling. The chassis measures 482 mm wide, 279 mm deep and 89 mm high, fitting standard 19-inch racks at 2U, and the rated power supply is 220 to 230 V at 50/60 Hz, suiting Indian mains directly. Working temperature range is minus 10 to 40 degrees Celsius.

System designers should still match the amplifier to the loudspeakers on programme power handling and impedance, set the processor’s crossover and limiter values for the actual cabinets, and allow ventilation space in the rack. Treated that way, the DT4000 provides a large reserve of clean power that lets passive cabinets deliver their rated performance rather than the clipped output of an undersized amplifier.

For installed venues, rental systems and portable rigs built around passive speakers that need serious drive, the DT4000 offers flagship-level output in the DT series two-channel format, with the sensitivity options, limiting and link connections that larger systems require.