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DUAL 51U.S.A

Manufacture:audio research
Original price: JPY 340,000
Price: JPY 163,636 Sold Out
24-43521-16578-00
U.S.A 1972 made
Arrival: 2026-02-14 20:12:36
The price has been drastically reduced. 2026/2/14 sales price 198,000 yen Maintenance completed. Audio Research 6550 push-pull stereo power amplifier. The resolution and dynamic sound are attractive. Recommended for those who want to make JBL or Altec sound loud with a vacuum tube. You can see a feeling of use, such as appearance, dullness, abrasions, etc. (Kobayashi Hitoshi) Maintenance information: 2026.2.13 maintained (vacuum tube 6550 replaced, film capacitor 0.47 μF added, electrolytic capacitor 25 μF replaced, Mylar capacitor 4000 pF and 3 others replaced, thermistor replaced 2, AC BAL. /DC BAL/BIAS re-adjustment, vacuum tube socket and RCA jack caulking repair, and other operation checks completed (measured at 36 to 50 W SP: 4 Ω with rated output AC 100 to 117 V) Accessories: none Main specifications: 117V specification 6550 push-pull vacuum tube 6550 x 5, 6FQ7 x 8, 12AX7 x 4 50W+50W W483 x H195 x D355 mm approx. 23 kg
　　
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