Sansui AU-707 Vintage Integrated DC Stereo Amplifier Hi-Fi Audio Tested Japan
Description
Sansui AU-707 Vintage Integrated DC Stereo Amplifier – Dual-Mono Power Supply, 85W+85W High-Current Output, and Audiophile High-Gain Phono Stage – Made in Japan Masterpiece 100V Tested
Up for sale is a legendary piece of golden-era audio engineering: the Sansui AU-707 Integrated DC Stereo Amplifier. Revered by vintage audiophiles worldwide, this heavyweight contender represents the absolute pinnacle of Sansui’s late-1970s acoustic innovation. Engineered with a pure DC (Direct Current) amplifier circuit design and a massive dual-mono power supply layout, the AU-707 delivers an exceptionally clean, fast, and transparent soundstage. Weighing a substantial 16.8kg and housed in a rugged steel chassis with a gorgeous matte-black aluminum faceplate, this amplifier is highly celebrated for its ability to drive demanding speakers with effortless authority, deep organic bass slam, and an incredibly low-distortion musical presence.
At the technical heart of the AU-707 is its advanced DC power amplifier stage, which eliminates coupling capacitors from the signal path to achieve near-zero phase shift and a ruler-flat frequency response. The dual-mono power configuration utilizes independent power supplies for the left and right channels, virtually eliminating crosstalk and maximizing dynamic headroom. For vinyl enthusiasts, the dedicated high-gain phono equalizer section handles both MM and sensitive MC cartridges with breathtaking detail and an ultra-low noise floor. Complete with precision-stepped tone controls, a subsonic filter, and massive speaker binding posts, this Japanese-built powerhouse effortlessly anchors any premium vintage or modern analog setup.
### Key Features & Specs
* Pure DC Amplifier Architecture: Eliminates capacitors from the feedback loop to deliver ultra-fast transient response and transparent instrumental textures.
* High-Power Output Stage: Conservatively rated at 85 watts per channel into 8 ohms, providing massive high-current drive for power-hungry vintage monitors.
* Dual-Mono Power Supply Design: Features heavy-duty independent power structures for both channels to ensure absolute stereo separation and dynamic stability.
* Premium Phono Equalizer Section: High-performance internal phono stage with selectable cartridge matching, perfect for high-fidelity vinyl playback.
* Professional Tone & Filter Controls: Equipped with defeatable bass/treble adjustments, loudness contours, and a specialized subsonic filter to eliminate turntable rumble.
* Substantial All-Metal Construction: Built like a tank with a thick brushed aluminum front panel, precision-machined knobs, and a heavy, resonance-damping chassis.
* Multi-Source Input/Output Matrix: Accommodates dual Phono inputs, Tuner, Aux, and two Tape monitor loops alongside robust A/B speaker switching.
### Condition & Technical Notes
* Functional: 100% operational. Meticulously bench-tested. Both left and right channels pull strong, even power with zero bias drift. All back-panel inputs (Phono, Tuner, Aux, Tape) accept signals perfectly. The faceplate controls, switches, and stepped volume pot have been cleaned and pass audio smoothly without any scratchiness or static noise. The speaker protection relay engages perfectly with a crisp, confident click upon startup.
* Cosmetic: Excellent pre-owned vintage condition. The iconic black aluminum front panel and lettering look exceptionally sharp and clean. The solid aluminum control knobs are beautifully preserved, showing only minimal, typical signs of gentle handling or faint superficial shelf wear consistent with careful audiophile ownership over the years.
* Power Requirement: This is an authentic Japanese market audio component engineered strictly for 100V lines (AC 100V, 50/60Hz, Power Consumption: 220W Rating). A high-quality step-down voltage transformer is highly recommended for safe, optimal, and long-term operation outside of Japan.
*Includes the vintage Sansui AU-707 Integrated Amplifier unit.
Up for sale is a legendary piece of golden-era audio engineering: the Sansui AU-707 Integrated DC Stereo Amplifier. Revered by vintage audiophiles worldwide, this heavyweight contender represents the absolute pinnacle of Sansui’s late-1970s acoustic innovation. Engineered with a pure DC (Direct Current) amplifier circuit design and a massive dual-mono power supply layout, the AU-707 delivers an exceptionally clean, fast, and transparent soundstage. Weighing a substantial 16.8kg and housed in a rugged steel chassis with a gorgeous matte-black aluminum faceplate, this amplifier is highly celebrated for its ability to drive demanding speakers with effortless authority, deep organic bass slam, and an incredibly low-distortion musical presence.
At the technical heart of the AU-707 is its advanced DC power amplifier stage, which eliminates coupling capacitors from the signal path to achieve near-zero phase shift and a ruler-flat frequency response. The dual-mono power configuration utilizes independent power supplies for the left and right channels, virtually eliminating crosstalk and maximizing dynamic headroom. For vinyl enthusiasts, the dedicated high-gain phono equalizer section handles both MM and sensitive MC cartridges with breathtaking detail and an ultra-low noise floor. Complete with precision-stepped tone controls, a subsonic filter, and massive speaker binding posts, this Japanese-built powerhouse effortlessly anchors any premium vintage or modern analog setup.
### Key Features & Specs
* Pure DC Amplifier Architecture: Eliminates capacitors from the feedback loop to deliver ultra-fast transient response and transparent instrumental textures.
* High-Power Output Stage: Conservatively rated at 85 watts per channel into 8 ohms, providing massive high-current drive for power-hungry vintage monitors.
* Dual-Mono Power Supply Design: Features heavy-duty independent power structures for both channels to ensure absolute stereo separation and dynamic stability.
* Premium Phono Equalizer Section: High-performance internal phono stage with selectable cartridge matching, perfect for high-fidelity vinyl playback.
* Professional Tone & Filter Controls: Equipped with defeatable bass/treble adjustments, loudness contours, and a specialized subsonic filter to eliminate turntable rumble.
* Substantial All-Metal Construction: Built like a tank with a thick brushed aluminum front panel, precision-machined knobs, and a heavy, resonance-damping chassis.
* Multi-Source Input/Output Matrix: Accommodates dual Phono inputs, Tuner, Aux, and two Tape monitor loops alongside robust A/B speaker switching.
### Condition & Technical Notes
* Functional: 100% operational. Meticulously bench-tested. Both left and right channels pull strong, even power with zero bias drift. All back-panel inputs (Phono, Tuner, Aux, Tape) accept signals perfectly. The faceplate controls, switches, and stepped volume pot have been cleaned and pass audio smoothly without any scratchiness or static noise. The speaker protection relay engages perfectly with a crisp, confident click upon startup.
* Cosmetic: Excellent pre-owned vintage condition. The iconic black aluminum front panel and lettering look exceptionally sharp and clean. The solid aluminum control knobs are beautifully preserved, showing only minimal, typical signs of gentle handling or faint superficial shelf wear consistent with careful audiophile ownership over the years.
* Power Requirement: This is an authentic Japanese market audio component engineered strictly for 100V lines (AC 100V, 50/60Hz, Power Consumption: 220W Rating). A high-quality step-down voltage transformer is highly recommended for safe, optimal, and long-term operation outside of Japan.
*Includes the vintage Sansui AU-707 Integrated Amplifier unit.
If you have any questions, please feel free to contact me.
Please check the condition of the product in the photo.
All items are in the picture.
【Note only for products that are turned on. Products that do not turn on are not eligible】
The power supply for this product is AC100V 50/60Hz.
A transformer may be required in some countries.
Please prepare the transformer on the purchase side.
The power supply for this product is AC100V 50/60Hz.
A transformer may be required in some countries.
Please prepare the transformer on the purchase side.
Outlet specifications →A type
If it is different from A type, a converter is required.
You in areas other than 100V.
If you use the transformer I sell, you can use it in areas other than 100V.
ebay.com
https://www.ebay.com/itm/373547463184
ebay.uk
https://www.ebay.com/itm/373547520813
ebay.eu
https://www.ebay.com/itm/373547520926
ebay.au
https://www.ebay.com/itm/373547520958
https://www.ebay.com/itm/373547520958
We also sell other than ebay.com.
Please contact us if you would like to purchase.
If you have any other questions, please contact me.
* It may not be possible in some areas
Please consider carefully.
At my shop, I will check the items that need to be checked before shipping.I will take a video of the operation confirmation.You can check the video on YouTube.This service gives buyers peace of mind.
