Product Details

Description

The Momentum HD Preamplifier is the evolution of one of Dan D’Agostino’s most celebrated designs, taking an already outstanding preamplifier and enhancing it with advanced technology, refined circuitry, and improved control systems. This HD edition introduces meaningful upgrades to the power supply, audio path, and user interface, delivering a level of performance that brings even greater speed, depth, and tonal richness to any system.

At the core of the Momentum HD is a newly engineered power supply featuring a transformer that is 33% larger than the original. Using advanced winding techniques first employed in the Momentum M400 amplifier, this transformer delivers increased current output without increasing physical footprint. With more headroom available, the output stages now operate at a 36% higher voltage rail—translating to faster transient response, improved dynamic contrast, and superior control, especially during complex passages.

The redesigned audio circuitry brings the most profound sonic improvement. A new discrete differential FET input stage with ultra-high input impedance—greater than 1MΩ—minimizes interaction with source components and isolates the signal path from noise and distortion. Originally developed as an experimental topology, this circuit delivered results that exceeded expectations, revealing finer details and delicate musical shadings with newfound accuracy. Subtle textures and tonal nuances come alive, giving instruments and voices greater realism and emotional impact. To maximize this performance, the output stage was also revoiced, creating a seamless synergy across the full signal path.

Control functionality has also been elevated. The HD edition introduces Bluetooth connectivity to its remote system, replacing the traditional infrared format. This upgrade dramatically increases range and eliminates the need for line-of-sight operation. New tone and volume circuitry enhances both range and precision, offering more granular control over your system’s presentation and making it easier to tailor the experience to your preferences.

Aesthetically, the Momentum HD reflects the signature D’Agostino design language, now with refined copper accents that mirror the sculpted look of the Momentum M400 and S250 MxV amplifiers. Available in silver or black, the preamplifier exudes elegance while complementing any high-performance audio system.

Featured Specs
Frequency Response

0.1 Hz to 1 MHz, -1 dB 20Hz to 20 kHz, ±0 dB

Signal-to-Noise Ratio

-105 dB, unweighted

Input Impedance

1 MΩ

General Specs
Depth (in.)

12

Height (in.)

4.3

Width (in.)

18

Weight

98

FAQs

Please read our FAQs page to find out more.

What is the warranty on Dan D'Agostino Amplifiers?

D’Agostino LLC warrants their amplifiers against manufacturing defects and defects in materials for five years from the date of retail purchase or six years from the original date of manufacture from an authorized Dan D’Agostino Master Audio Systems dealer, subject to certain conditions.

Do you offer service on Bowers & Wilkins loudspeakers?

We do! In many cases we can service a still under warranty amplifier in the home, however in rare cases we might need to bring it in for more extensive maintenance.

Do you accept trade-ins toward purchase?

Absolutely. We have an aggressive trade in program aimed at getting our clients to the next level. Ask one or our experts about it or submit your potential trade in gear here.

Interested in Learning More?

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