Dynaco Stereo 400 power amplifier in Very Good condition

  • Original box ( will be double boxed and packed very well to protect the original, shown in photos)
  • Original Manual
  • Overall VG condition, some minor wear as shown
  • Tested and working well. No work was done here at the shop. Original lamps ( not LED upgrades)

Experience the "absolute unit" of 1970s Hi-Fi. Designed by the legendary James Bongiorno, the Dynaco Stereo 400 is a powerhouse of American audio engineering, renowned for its massive headroom, clean neutrality, and robust, "overbuilt" construction.

Whether you're driving demanding vintage speakers or building a high-fidelity studio setup, this amplifier delivers authoritative power with a frequency response designed to minimize listening fatigue.

Why?:

  • Power Output: 200 Watts per channel into 8Ω (Stereo); bridgeable to 600 Watts into 8Ω (Mono).
  • Massive Cooling: Features over 1,000 square inches of heat sink area for stable, continuous operation.
  • Dynaguardâ„¢ Protection: Includes an adjustable dynamic power limiting circuit to protect your speaker loads from excessive signals.
  • Build: Solid-state silicon design with 46 transistors and a direct-coupled main amplifier for ultra-low distortion.

In the Milwaukee Area? Stop in our shop to inspect/demo

See our feedback and thank you for considering. All the gear we sell is packaged with great care for safe arrival in the condition advertised and backed up by our 14 day full refund policy in the event you are not happy for any reason.

Local Pickup at our shop in Milwaukee, WI

Milwaukee Vintage
10220 W. Greenfield Ave
Milwaukee, WI
Open Tues-Friday 11-6
Saturday 11-3

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Listed2 months ago
ConditionVery Good (Used)
Very Good items may show a few slight marks or scratches but are fully functional and in overall great shape.Learn more
Brand
Model
  • Stereo 400
Year
  • 1970’s

Product safety information may be available here.

Milwaukee Vintage

Milwaukee, WI, United States
Joined Reverb:2017

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