D'Agostino Progression M550 Monoblock Amplifier Pair · Early Build, M500 Chassis
Sold as a pair
Definitive is one of the most respected D'Agostino dealers in the country. They know this line the way most shops know their best sellers. Every circuit generation. Every chassis revision. What it needs to perform, and what it gives back when it gets there. When a D'Agostino comes through Definitive on a trade-up, that knowledge comes with it.
Here's what this one is. An early Progression M550 … the full M550 circuit and power supply, 550 watts into 8 ohms, 1,100 into 4, 2,200 into 2, housed in the earlier Progression M500 chassis. D'Agostino built it this way during the move to the second generation. The output doubles cleanly as the load drops, which is the tell. That only happens when the power supply behind it is real. And this one has it.
The earlier chassis carries less heat sink mass than the later M550 body, so it isn't built to sit at full rated power indefinitely. That's not a limitation anyone hears. Music moves in peaks, not a steady wall, and the peaks are where this amplifier lives.
What you're getting is D'Agostino's circuit topology, Definitive's full read on where this unit came from and what it'll do in your room, and a price the later chassis doesn't ask.
Came in as a trade-up through our partnership with Definitive. Stock photos shown. Want to go deeper on the circuit, the pairing, or the provenance? We'll put you straight through to Hans at Definitive. He knows this amplifier better than anyone.
Please note: This item is currently located at Definitive in Bellevue, WA — not at the Portland shop. If you choose to have it shipped, please allow additional time for transit. If you select in-store pickup, you will receive a confirmation email once the item is ready. For any questions, please contact us directly.
$50,000 MSRP per pair
Due to size and weight, this item may incur an additional shipping surcharge and is listed as Store Pick Up Only. Contact us for a quote if you wish to have it Shipped.
Phone: 888-248-3246
Email: info@echohifi.com
Inquire Now
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Return Policy
Return Policy
We offer a 3-day return window on all purchases. Returns made to a credit or debit card will incur a 5 percent processing fee. Shipping costs, both to and from, are the responsibility of the customer if applicable.
After the 3-day window and up to 3 weeks from the date of purchase, items may still be returned, subject to a 20 percent restocking fee.
For shipped orders, customers must notify us within 3 days of receiving the item to initiate a return. Once the item is received back in the same condition it was sent, we will issue a refund minus all shipping charges and a 5 percent credit card processing fee.
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Need Help? View our services
Sold as a pair
Definitive is one of the most respected D'Agostino dealers in the country. They know this line the way most shops know their best sellers. Every circuit generation. Every chassis revision. What it needs to perform, and what it gives back when it gets there. When a D'Agostino comes through Definitive on a trade-up, that knowledge comes with it.
Here's what this one is. An early Progression M550 … the full M550 circuit and power supply, 550 watts into 8 ohms, 1,100 into 4, 2,200 into 2, housed in the earlier Progression M500 chassis. D'Agostino built it this way during the move to the second generation. The output doubles cleanly as the load drops, which is the tell. That only happens when the power supply behind it is real. And this one has it.
The earlier chassis carries less heat sink mass than the later M550 body, so it isn't built to sit at full rated power indefinitely. That's not a limitation anyone hears. Music moves in peaks, not a steady wall, and the peaks are where this amplifier lives.
What you're getting is D'Agostino's circuit topology, Definitive's full read on where this unit came from and what it'll do in your room, and a price the later chassis doesn't ask.
Came in as a trade-up through our partnership with Definitive. Stock photos shown. Want to go deeper on the circuit, the pairing, or the provenance? We'll put you straight through to Hans at Definitive. He knows this amplifier better than anyone.
Please note: This item is currently located at Definitive in Bellevue, WA — not at the Portland shop. If you choose to have it shipped, please allow additional time for transit. If you select in-store pickup, you will receive a confirmation email once the item is ready. For any questions, please contact us directly.
$50,000 MSRP per pair
Due to size and weight, this item may incur an additional shipping surcharge and is listed as Store Pick Up Only. Contact us for a quote if you wish to have it Shipped.
Phone: 888-248-3246
Email: info@echohifi.com
Inquire Now
8.5/10 - Great Condition, Pre-owned model from Definitive