Dan D'Agostino Master Audio Systems is adding a two-channel amplifier to its Progression Series. Employing the company's Super Rail circuitry, the new Progression Stereo amp is "conservatively" rated at 300 watts per channel into eight ohms, 600 watts into four ohms, and 1,200 Watts into two ohms. The amp has an anodized aluminum chassis that weighs 125 pounds and houses a nearly 3,000-VA power supply transformer coupled to 400,000 microfarads of storage capacitance. The Progression Stereo amp will be available in May for $22,000.
Dan D'Agostino Master Audio Systems
Dan D'Agostino Master Audio Systems announced the Progression Stereo, the second model released in the Progression Series that debuted in 2016.
Leveraging the innovative Super Rail circuitry, first unveiled in the Progression Mono amplifier, the Progression Stereo amplifier exploits this unique technology to deliver remarkable control and fidelity to any connected loudspeaker. Every amplifier employs a voltage rail--actually two, a positive one and its companion negative partner. Voltage rails support the delivery of power to the speaker. The music signal swings between these two rails, but due to natural loss, the musical signal never reaches the output rails' full capability. Borrowing the idea of a turbo in a car engine, the Super Rail employs higher voltage rails in the sections prior to the output stage. This voltage "boost" allows the musical signal to exploit the full capability of the output voltage rails and maximize the performance of the output circuitry itself. The result is improved dynamics, lower distortion, and a fierce grip of the speaker.
"With the Progression Series, we focused on creating amplifiers that deliver our performance and power delivery at a lower price. The Progression Stereo amplifier takes advantage of our new Super Rail technology, which lifted the amplifier's sound quality beyond my expectations," company founder and chief engineer Dan D'Agostino said.
"More affordable than the Momentum Series, in large part because we used aluminum instead of copper for the heatsinks," D'Agostino continued, "the Progression Stereo still employs through-hole construction for the best sound quality and durability, and like all our products, the Progression Stereo amplifier is hand built in our Arizona facility."
A graceful anodized aluminum chassis houses a nearly 3,000 VA power supply transformer coupled to 400,000 microfarads of storage capacitance. Paired to this foundation is a fully complementary driver stage, and output circuitry outfitted with 48 power transistors. The Progression Stereo is conservatively rated at 300 Watts into 8 Ohms and delivers 600 Watts into 4 Ohms, and 1,200 Watts into 2 Ohms.
Inspired by the elegant faces of classic Swiss watches, the Progression Stereo is fronted by an exposed movement power meter. Featuring two 90-degree needle swing arms, a high-speed ballistic circuit enhances the meter's responsiveness.
The venturi style heatsink design, premiered in the Momentum amplifiers, has been adapted to the cooling needs of the Progression Stereo amplifier. Starting with a 48.5 lb (22 kg) aluminum slab, each heatsink is milled to form the most efficient cooling element possible. This efficiency keeps the Progression Stereo amplifier running surprisingly cool despite its power output.
The Progression Stereo amplifier will begin shipping in May 2017 at $22,000 USD. Standard finishes include silver or black with custom painted finishes available upon request.
• Visit the company's website for more product information.
• D'Agostino Audio Upgrades Momentum Monaural Amplifier at HomeTheaterReview.com.