Source: Press Release, Last Accessed: 2024/03/19

Combining the front-end technology from the Momentum HD Preamplifier and the power section of the Momentum S250 MxV Stereo Amplifier, the new amp delivers Momentum Series performance in a compact framework only hinting at the advanced circuitry within.
Employing a configurable, modular design, the core line stage section can be augmented to include a digital streaming and/or a phono stage module. Each internal section is highly specialized but knowing the exact complement of power supply, control, and audio circuitry being used together, affords to engineer a vision of the system that is typically not possible, the company says.
The backbone is a new ultra-quiet 2,000VA linear transformer. A unique toroidal winding technology delivers greater power output than from a similarly sized conventional transformer. Surprisingly small for its capability, it drives a nearly 60,000uF filter, resulting in 250/500/1,000W power output into 8/4/2 Ohm speaker loads. Internal circuitry filters RF noise from the AC power line and compensates for asymmetric power waveforms and DC on the mains.
The Momentum MxV features two separate chassis – a dedicated audio chassis and a separate power supply. The two chassis interlock through special mechanisms in the mounting feet of each chassis. Thirty-pin interlocking 30-amp, gold plated connectors eliminate wiring normally used for these applications and the associated anomalies that can occur. This distinctive construction isolates the audio signal completely, both physically and electrically from the power supply section, the company says.
In the preamplifier section, six individual left and right circuit boards make up the input, volume control, and output sections. The core topologies have been appropriated from the Momentum HD Preamplifier including an innovative FET-based input stage.
The final output stage features new output transistors that were originally sourced for the flagship Relentless monoblock amplifier. 28 high speed, high-output transistors are used, with each transistor mounted directly to the copper heat sinks. Every output transistor is measured and only devices that match the required performance specifications are included in the production.
An optional digital module adds S/PDIF coaxial, optical, and USB-A for legacy digital components and Ethernet and Wi-Fi for network-based music. A dedicated iOS D’Agostino DSM app provides built-in Tidal, Qobuz, MQA decoding, plus complete unit control. PCM signals up to 32-bit/192kHz and DSD up to DSD1024 are supported. The optional phono module adds vinyl playback capability. Low output moving coil cartridges are supported with over 60dB of gain and loading options from 100 Ohm-47 kOhm. Available in silver, black, or custom painted finishes, every Momentum MxV Integrated Amplifier is hand-built and individually tested in D'Agostino's Arizona factory.

For more information: https://www.dandagostino.com/

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