Sansui AU-X111 MOS Vintage:
An utterly fantastic Japanese high-fidelity integrated amplifier!


The Sansui AU-X111 MOS Vintage, released in Japan in 1985 during the “Golden Era” of high-fidelity Japanese audio equipment, is a “master quality” integrated amplifier with an exceptional reputation. It offers a rated output power of 110W + 110W (8 Ohms) with total harmonic distortion (THD) of <0.008%. Clocking in at 35.1 kg (78 lb), this thing is built like a tank, but to a high degree of precision. The amp circuits is of the highest quality , featuring 16 MOS FETs (!) In the diamond power stage, 4 apiece for the positive and negative sides of the left and right channels. Sansui is known to pursue improvement of the electronic signal characteristics via materials engineering. For example, by the use of pure copper and demagnetized bonding wire, the signal cutoff frequency is improved, and the signal bandwidth is widened.This is a top-of-the-line amp, and everything about this amp spells quality, with its precise, thoughtful construction and handsome appearance, featuring real rosewood paneling. These fantastic vintage Sansui amps are rather rare, so don't miss this one in very good condition!

This unit is in very good condition, with some signs of age and use, including some scratches and scuffs as a whole (please see photos). This amplifier has been thoroughly checked and tested by our professional technician, who has confirmed its integrity and working condition. These "Golden Era" amps are known for their robust construction and use of the highest quality parts, so it's likely this unit will see many more years of use.

Additional Information

Technical Specifications
-Serial : 637114904
-Country of Manufacture : Japan
-Power Supply : AC100V 350W 50 / 60Hz


Please check the power requirements for this device and the specifications of your power supply. If you need to use this item in a 220-240 V environment, you'll need a transformer. We sell high quality Japanese compact transformers (Nissyo), which will allow you to use this item safely and with good performance in your country.

Import Tax
・Import duties, taxes, and other charges which are not included in the item price or shipping charges are the buyer’s responsibility.

・Please check with your country’s customs office to determine what these additional costs will be prior to bidding or buying.

・Except in the case of faulty or damaged items, refunds do not include any return shipping or shipping charges. Your return shipping charge will be deducted from your refund if you receive any.

This item is sold As-Described

This item is sold As-Described and cannot be returned unless it arrives in a condition different from how it was described or photographed. Items must be returned in original, as-shipped condition with all original packaging.Learn More.

Listed4 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
  • AU-X111 MOS Vintage
  • Black
Made In
  • Japan

Reverb Protection

Simple Returns, Secure Transactions, Human Support

Learn more

Secure Checkout


Yokohama, Japan
Joined Reverb:2019

Reverb Gives

Your purchases help youth music programs get the gear they need to make music.

Carbon-Offset Shipping

Your purchases also help protect forests, including trees traditionally used to make instruments.

Oops, looks like you forgot something. Please check the fields highlighted in red.