The Dan D'Agostino Momentum C2 Preamplifier (short for Concept 2) marks a profound evolutionary leap forward from its predecessor, the Momentum HD. Available through Trimira Audio, Brisbane’s premier destination for ultra-high-end audio, the Momentum C2 incorporates a revolutionary complementary four-circuit topology directly inspired by the flagship Relentless Preamplifier.
Designed as the universal reference control center for high-end systems utilizing conventional power amplifiers, the Momentum C2 achieves vanishingly low noise, vast dynamics, and liquid musicality without adding color or distortion.
Key Features & Engineering Innovations
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Relentless-Inspired Four-Circuit Topology: Built around a complementary differential JFET push-pull arrangement using four matched JFET transistors, raising input impedance to 1 MΩ and dropping noise to near-zero levels.
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Isolated Two-Chassis Architecture: Keeps sensitive audio processing completely separate from electrical noise. The upper main chassis handles audio signals, while the lower chassis houses a dedicated dual-transformer linear power supply connected via a heavy-duty 20-amp locking connector.
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Dual-Transformer Power Supply: Custom toroidal transformers feed analog and digital rails independently, while internal filtration circuitry suppresses AC line fluctuations and RF interference.
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Discreet Headphone & Tone Control Circuitry: Features defeatable, ultra-transparent tone controls for tailored listening, alongside a high-drive headphone amplifier concealed behind a sliding front panel logo door.
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Bi-Directional Remote Control: Machined from aluminum and Delrin®, the included bi-directional remote features an integrated LCD screen that mirrors front-panel settings and volume readouts in real time.
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Optional Digital Streaming Module (DSM): Field-upgradable digital board adding SPDIF Coaxial, Optical, USB-B, RJ45 Gigabit Ethernet, and Wi-Fi inputs. Natively decodes PCM up to 32-bit/384kHz and DSD256, supported by an iOS control app integrating Roon, Tidal, Qobuz, and Spotify.
Technical Specifications
| Feature / Metric |
Specification |
| Circuit Topology |
Fully balanced, complementary 4-JFET differential push-pull design |
| Frequency Response |
0.1 Hz – 1 MHz (-1 dB) / 20 Hz – 20 kHz (±0 dB) |
| Signal-to-Noise Ratio |
>105 dB (unweighted) / >110 dB (A-weighted) |
| Distortion (THD) |
<0.002% (20 Hz to 20 kHz) |
| Gain |
+10 dB |
| Input / Output Impedance |
1 MΩ Input / 0.05 Ω Output |
| Analog Inputs |
3 Stereo Pairs Balanced XLR, 1 Stereo Pair Unbalanced RCA |
| Analog Outputs |
2 Stereo Pairs Balanced XLR, 1/4-inch (6.35mm) Headphone Jack |
| Dimensions (W x H x D) |
17.0 x 8.9 x 15.2 in / 43.2 x 22.6 x 38.6 cm |
| Weight |
73 lbs / 33.1 kg |
| Finishes Available |
Anodized Silver or Stealth Black |
