Crown CTD-4125 - Comtech Dante 4X125W Amplifier

Crown CTD-4125 — ComTech D Amplifier with Dante, 4x125 W and Power Sharing

The Crown CTD-4125 is a 4-channel installation amplifier that delivers 125W per channel when all channels are working equally. Its asymmetrical power sharing architecture allows all four channels to share a total of 500W in any proportion, so you can allocate power exactly where each zone or speaker needs it. It features built-in DSP for room and speaker tuning, with factory-installed JBL SpeakerTunings for select models (including the JBL Control 400 in-ceiling series), speeding the implementation of complete HARMAN solutions.

For networked audio, the CTD-4125 offers Dante inputs and outputs with support for redundant configurations and the ability to select the tap point for the Dante outputs (from pre-processed analog signal, speaker preset, or post-set), facilitating routing and monitoring within complex systems. Configuration is done from a browser using an intuitive WebUI , without the need for proprietary software, while large-scale management is centralized with AVX Manager . For control and integration, it uses the HControl protocol to communicate natively with BSS OMNI processors and AMX MUSE controllers , and includes a simple third-party API .

The outputs are switchable Lo-Z/Hi-Z and support 4/8 Ω and 70/100 V in any combination, maximizing compatibility with low-impedance speakers and line voltages. For system monitoring, there is a pilot tone , Load Monitoring , and a source priority mixer on the inputs, plus GPIO with multiple GPIs for user interfaces and a dedicated GPO for status and alerts. The compact 1 RU, half-rack width chassis allows for rack, under-desk, or wall-mount installation with the included hardware. Dimensions: 43 × 220 × 358 mm . Weight: 3.2 kg .

Main features

• 4 × 125 W (all channels on equal terms) with power distribution up to 500 W total in any proportion.
• Switchable Lo-Z/Hi-Z outputs : support 4/8 Ω and 70/100 V in any combination.
• Dante with I/O , redundancy support, and selectable Dante outputs from pre- or post-processed points.
• Built-in DSP for EQ, filters, and pre-loaded JBL SpeakerTunings .
• Configuration via WebUI without proprietary software; management with AVX Manager .
• HControl with native BSS OMNI and AMX MUSE integration + third-party API .
• Supervision : Pilot tone, Load Monitoring and source priority switching .
• GPIO : multiple GPI for control (volume, mute, source selection, etc.) and dedicated GPO for status/alerts.
• 1 RU, ½ rack chassis with included mounting hardware for rack, under-table or wall mounting.
• Dimensions and weight : 43 × 220 × 358 mm; 3.2 kg.

Benefits for integrators and users

• Power flexibility : adapts channel delivery to the size of each zone without changing stages.
• Less equipment : DSP, Dante I/O, and WebUI reduce additional hardware and deployment time.
• True interoperability with HARMAN ecosystems (BSS/AMX) and third-party control systems.
• Reliability : Network redundancy and monitoring tools help maintain service continuity.
• Space efficiency : 4 channels in 1 RU half-width, ideal for compact racks and locations.

Use cases

• Retail, hospitality and leisure : multi-zone ambient music with different levels per area.
• Corporate and education : meeting/training rooms with room profiles and centralized control.
• Hotels and resorts : combination of 70/100 V lines with specific areas in low impedance.

Frequently Asked Questions

• Can I mix low-impedance speakers and 70/100V lines? Yes. The outputs are switchable between Low-Z and High-Z and can be combined depending on the project.
• Does it have Dante network redundancy? Yes, the ComTech D series supports redundant Dante configurations.
• Do I need software to set it up? No, it can be configured from any browser via the WebUI.
• Does it include speaker presets? Yes, it includes JBL SpeakerTunings for select models (e.g., JBL Control 400).

Description for projects

4-channel installation amplifier, 125 W/channel (all channels), 500 W total power distribution ; switchable 4/8 Ω and 70/100 V outputs ; Dante I/O with redundancy support and tap point selection (pre-processed/pre-tuning/post-tuning); integrated DSP with JBL SpeakerTunings; WebUI and AVX Manager management; HControl compatible with BSS OMNI and AMX MUSE + 3rd party APIs ; pilot tone monitoring and Load Monitoring ; source priority ; GPIO with multiple GPIs and dedicated GPO; 1 RU, ½ rack chassis, rack/table/wall mount included; 43 × 220 × 358 mm ; 3.2 kg .