The Dan D'Agostino Momentum M400 MxV Monoblock Amplifier represents the ultimate refinement of the landmark chassis that launched Dan D'Agostino Master Audio Systems. Available through Trimira Audio, Brisbane’s destination for high-end HiFi, the M400 MxV incorporates state-of-the-art circuit topologies originally developed for the flagship Relentless series.
Deriving its name from the fundamental physics formula for momentum Mass times Velocity (M x V) this compact monoblock delivers extraordinary speed, immense dynamic scale, and remarkable delicacy. Delivering a conservative 400 Watts into 8 Ohms, 800 Watts into 4 Ohms, and 1,600 Watts into 2 Ohms, the M400 MxV comfortably commands even the most demanding loudspeaker loads.
Key Features & Engineering Innovations
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Relentless-Derived Circuit Architecture: Enhances every major operational stage—power supply, input, driver, and output—with topologies directly adapted from the world-reference Relentless Monoblock.
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Ultra-Quiet 2,200 VA Linear Transformer: Features an advanced winding pattern that reduces hysteresis effects by 90%, yielding a 50% increase in current capacity and immense dynamic headroom from the same physical footprint.
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Super-Fast Output Transistors: Utilizes 28 output transistors originally sourced for the Relentless series. Operating at a blistering 69 MHz with wide bandwidth capabilities, each transistor is secured with dual stainless steel fasteners for optimal thermal coupling.
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50% Increase in Class A Bias: An upgraded bias-stability circuit increases Class A operation by nearly 50%, producing richer, more organic harmonic textures and liquid liquid mid-range resolution.
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Signature Venturi Copper Heatsinks: Custom-milled solid copper heatsinks utilize a specialized Venturi cooling geometry to draw heat efficiently away from output devices, maintaining complete thermal and electrical stability under high stress.
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Fully Complementary Direct-Coupled Circuitry: Pure direct-coupled, fully balanced topology operates with zero global negative feedback, maintaining total signal integrity and extended frequency response.
Technical Specifications
| Feature / Metric |
Specification |
| Output Power |
400 W @ 8Ω / 800 W @ 4Ω / 1,600 W @ 2Ω |
| Frequency Response |
1 Hz – 200 kHz (-1 dB) / 20 Hz – 20 kHz (±0.1 dB) |
| Distortion (THD) |
0.09% @ 1 kHz @ 400 W into 8Ω |
| Signal-to-Noise Ratio |
115 dB (unweighted) |
| Input Impedance |
1 MΩ |
| Output Impedance |
0.11 Ω |
| Inputs / Outputs |
1 Balanced XLR Input / 1 Pair Custom Gold-Plated Binding Posts |
| Dimensions (W x D x H) |
12.5 x 21.5 x 5.25 in / 31.75 x 54.61 x 13.34 cm |
| Weight |
95 lbs / 43.1 kg per unit |
| Finishes Available |
Anodized Silver, Stealth Black, or Custom Finishes |
Experience Momentum MxV at Trimira Audio
Connect with the audio experts at Trimira Audio to explore component matching, request upgrade options for existing Momentum owners, or arrange a private listening session.
