The Dan D'Agostino Momentum S250 MxV Stereo Amplifier delivers the breathtaking musicality and control of the flagship Momentum series in a single, elegantly engineered stereo enclosure. Available through Trimira Audio, Brisbane’s destination for high-end HiFi, the S250 MxV incorporates state-of-the-art circuit topologies originally developed for the reference Relentless series.
Taking its name from physics where momentum equals Mass times Velocity (M x V) the S250 MxV delivers remarkable speed, immense dynamic authority, and delicate micro-detail. Outputting 250 Watts into 8 Ohms, 500 Watts into 4 Ohms, and 1,000 Watts into 2 Ohms, this stereo amplifier easily drives demanding loudspeaker loads while preserving a sleek, single-chassis footprint.
Key Features & Engineering Innovations
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Relentless-Derived Circuit Architecture: Leverages advanced front-end, driver, and output stage topologies scaled directly from the flagship Relentless Monoblock for unmatched clarity and low-level detail.
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Ultra-Quiet 2,200 VA Linear Transformer: Features a specialized winding scheme that reduces hysteresis losses by 90%, yielding a 50% increase in current capacity and explosive dynamic headroom.
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69 MHz High-Speed Output Devices: Employs 28 ultra-fast output transistors originally chosen for the Relentless series. Each transistor is mechanically secured with dual stainless steel fasteners for superior thermal conductivity.
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Enhanced Class A Bias Scheme: An upgraded bias-stability circuit increases Class A operation by nearly 50%, producing richer, more organic harmonic textures and liquid mid-range resolution.
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Solid Copper Venturi Cooling: Machined copper heatsinks utilize a custom Venturi geometry to draw heat efficiently away from output devices, keeping the chassis cool and stable during intense power demands.
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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 |
250 W @ 8Ω / 500 W @ 4Ω / 1,000 W @ 2Ω |
| Frequency Response |
1 Hz – 200 kHz (-1 dB) / 20 Hz – 20 kHz (±0.1 dB) |
| Distortion (THD) |
0.05% @ 1 kHz @ 250 W into 8Ω |
| Signal-to-Noise Ratio |
105 dB (unweighted) / 75 dB (A-weighted) |
| Input Impedance |
1 MΩ |
| Output Impedance |
0.12 Ω |
| Inputs / Outputs |
1 Pair Balanced XLR Inputs / 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 Stereo at Trimira Audio
Connect with the high-fidelity specialists at Trimira Audio to explore component matching, inquire about factory upgrades for earlier Momentum models, or schedule a private audition.
