The Momentum S200 to S250 MxV Upgrade provides owners of original Dan D'Agostino Momentum S200 Stereo Amplifiers with a comprehensive, factory-authorized upgrade path to current Momentum S250 MxV performance standards. Facilitated through Trimira Audio, Brisbane’s premier destination for ultra-high-end audio, this enhancement updates every internal circuit assembly while preserving the iconic copper-and-aluminum chassis.
Representing Mass times Velocity (M x V), the MxV designation incorporates groundbreaking circuit design techniques derived directly from the flagship Relentless Series. The upgrade increases power output to 250 Watts per channel into 8 Ohms and introduces an upgraded power supply, driver section, and front analog power meter faceplate.
Key Features & Technological Innovations
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Power Output Elevated to 250W/Ch @ 8Ω: Increases power delivery from the original 200 Watts to 250 Watts per channel into 8 Ohms (doubling linearly to 500W into 4 Ohms and 1,000W into 2 Ohms), offering expanded dynamic contrast and total control over demanding loudspeaker loads.
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New 2,200 VA Linear Transformer: Replaces original power supply transformers with an ultra-quiet 2,200 VA unit featuring a re-engineered winding scheme that reduces hysteresis loss by 90% and improves current output by over 50%.
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Nearly 100,000 µF Capacitor Reservoir: Boosts local power storage to a high-speed bank of nearly 100,000 µF, supplying instant current reserves for complex dynamic passages and deep low-frequency transients.
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Relentless-Derived Input & Output Stages: Integrates wide-bandwidth front-end bipolar transistors—delivering ten times the current of the originals—and 28 ultra-fast 69 MHz output transistors originally sourced for the Relentless Series.
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Fully Complementary Driver Section: Utilizes individual transistors for positive and negative signal halves, doubling current drive to the output stage and doubling open-loop gain for a more spacious, detailed soundstage.
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New 250W Meter Faceplate: Includes a brand-new 250-Watt scale meter faceplate with individual channel needles to accurately reflect the amplifier's increased power reserves.
Technical Specifications & Upgrade Comparison
| Feature / Metric |
Momentum S200 |
Momentum S250 MxV |
| Output Power @ 8Ω (per ch) |
200 W RMS |
250 W RMS |
| Output Power @ 4Ω (per ch) |
400 W RMS |
500 W RMS |
| Output Power @ 2Ω (per ch) |
800 W RMS |
1,000 W RMS |
| Main Transformer |
Standard Linear Transformer |
2,200 VA Ultra-Quiet Transformer (+50% Current) |
| Power Supply Capacitance |
Standard Capacitance Bank |
~100,000 µF High-Speed Bank |
| Output Stage Transistors |
Standard High-Speed Devices |
28 High-Output 69 MHz Relentless-Spec Devices |
| Front Analog Meter |
200W Scale Meter Plate |
Updated 250W Scale Meter Plate |
| Frequency Response |
1 Hz – 200 kHz (-1 dB) |
1 Hz – 200 kHz (-1 dB) / 20 Hz – 20 kHz (±0.1 dB) |
| Signal-to-Noise Ratio |
>105 dB (unweighted) |
>105 dB (unweighted) / >75 dB (A-weighted) |
Arrange Your Momentum Stereo Upgrade with Trimira Audio
Contact the high-end audio specialists at Trimira Audio to verify serial number eligibility for your Momentum S200 stereo amplifier, receive complete pricing, and coordinate factory service logistics.
