Balanced Tung Sol 12AU7 ECC82 Preamp Tube
The Tung Sol 12AU7 ECC82 Preamp Tube combines two indpendant medium-mu indirectly heathed cathode type triodes in the small 9 pin button construction.
These tubes are balanced.
What are balanced triodes?
These balanced tested tubes have equal gain ratings on both triodes, which can help reduce noise and microphonics in the preamp section of amps.
Get the datasheet here.