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The Tung-Sol 12AU7W / 6189 is a current-production small-signal dual triode that drops into any 12AU7/ECC82 circuit, from preamps and phonostages to buffers and guitar amps. It is sold in graded tiers: Platinum grade offers the lowest noise and microphony with triode balance typically 10% or tighter, while Gold grade runs 15% to 20%. Buyers pick it for quiet operation and dependable service, and matching is included in any quantity. Against NOS 12AU7s it trades collector rarity for consistent supply and low noise; against budget current-production tubes it costs more but is graded and matched.
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Lowest price we've seen: $27.99 on Nov 13 at Amazon. Tracked across 1 store since Nov 13.
Rated 4.8 out of 5 across 63 ratings, the tube is well regarded for quiet operation and solid sound in 12AU7 circuits. Buyers treat it as a dependable current-production pick.
The Tung-Sol 12AU7W / 6189 is a current production vacuum tube made in Russia.
The tubes are graded by noise, microphonics and triode balance. Platinum grade has the lowest noise and microphony and the tightest triode balance available, typically 10% or tighter. Gold grade has low noise and microphonics, with a balance typically between 15% and 20%. Either grade may run higher depending on available stock.
A Driver/Buffer grade is not offered for this tube. For a preamp or phonostage, Gold grade is the minimum recommended. Matching is included for any quantity.