Dan D'Agostino Relentless 800 Mono Amplifier

The Relentless 800 Mono Amplifier from Dan D'Agostino brings the exceptional audio quality of the original Relentless into a more compact form. While offering slightly lower power output than its larger counterpart, it delivers virtually unlimited power and dynamic contrasts, maintaining a nuanced and musical sound even at low volumes.

At its core, the Relentless 800 features a nearly four-kilowatt transformer and a 400,000 F capacitance power supply, delivering 800 watts into 8 ohms. When connected to a 220-volt outlet, it doubles its output, producing 1,600 watts into 4 ohms and 3,200 watts into 2 ohms. The power supply is shielded to minimize noise and ensure clean, reliable power for optimal performance.

The amplifier uses a fully complementary design, ensuring perfect balance between the positive and negative components of the signal, which cancels out distortion. The gain circuits operate in the current domain, maintaining stable performance without the need for global negative feedback. New input stage devices increase current by 300%, improving frequency response and reducing distortion, while the amplifier’s open-loop linearity ensures superior sound.

A new bias stability circuit boosts operating bias by nearly 50%, enhancing Class A operation for better sound quality, while Copper/Aluminum heatsinks manage thermal consistency even under high demand. Upgraded driver transistors handle 33% more power, reducing demand on individual devices and lowering overall output impedance.

Super Rail technology uses higher voltage rails to “turbocharge” the amplifier, improving dynamics, reducing distortion, and tightening its electrical grip on the speaker. The output stage features matched high-output transistors for consistency in both sonic and technical performance, with careful transistor matching ensuring linearity from 50mA to 5A.

With its advanced design, the Relentless 800 Mono Amplifier delivers powerful, precise performance with exceptional sound quality, making it a standout in any high-end audio system.