An Audio Research VT80 Foundation Series vacuum tube 2-channel power amplifier was a demonstration model. Original box and packaging come with VT80.
The power amplifier is a 9 out of 10 condition. The unit thas a limited warranty or 1.5 years still available except for the tubes. Tubes only
has a 90 day factory warranty and being demonstration unit has surpassed the
time line. Tubes are fully operational
and working properly in the unit.
Shipping – Included
with purchase of the unit within most contiguous US states(lower 48 states) only.
Shipping cost is added to buyers in Alaska, Puerto Rico, Hawaii, Guam and Virgin Islands.
The new VT80 is the much-anticipated amplifier that
finally allows the Foundation series to be shown as a complete system.
Combining an enticing new esthetic with worry-free operation and great audio
performance, the VT80 is a vacuum-tube amplifier that will open doors to a new
At the heart of the VT80 are two important new
features that have never been offered before by Audio Research. The first is a
proprietary auto-bias circuit developed entirely in-house by our engineering
department. Simply drop in the tubes and the VT80 will adjust bias for each
output tube. The circuit automatically adjusts for tube wear or fluctuations in
the power in real time. It will also work for different types of output tubes,
including 6550, KT88, KT90, KT120 or KT150. The adjustment range is wide, but
matched tubes from Audio Research still provide the highest performance.
Finally, an auto-bias circuit that works in real time and does not compromise
The second new feature includes fusing of each output tube. In case of a fault
condition in a tube, an easily replaceable fuse will blow, not a resistor. This
is what we mean by worry-free operation.
With the beautiful new look, the flexible connection options, and the great new
features, thrilling audio performance remains our primary goal and the
foundation upon which we were built. Designed as part of the Foundation series,
the core of the VT80 is adapted from the Reference 75, including the same power
and output transformers, similar circuit topology, and many of the same parts.
The 75 watt-per-channel VT80 offers striking dynamics, powerful bass, and
natural clarity combined with a very holographic presentation. The result is
sonically breathtaking and provides a new reference in its price range.