Threshold T400 Class A amplifier. Lots positive reviews! $6,000 MSRP

Selling for $1,995.00

Class A sound for cheap


The Threshold T400 is one of many Class A Threshold amps that still draw much reverence today. To many audiophiles, the T400 and its other Class A siblings from Threshold are unbeatable in sound quality, design and longevity. There is a certain power in its guts that seems to draw out the best in any system (especially when they are all well matched together). It has impressive control, well loaded bottom end, tube-like warm midrage and a well defined top end. A Threshold preamp is an ideal matchup but any preamps with low output impedance will work nicely too. Power output of the T400 is a very conservative 150W in 8 ohms and doubles up until it reaches 600W in 2 ohms. If you can find another pair and drive them as monoblocks, you can squeeze 450W of Class A magic in 8 ohms or a thundering 900W in 4 ohms. These are very impressive numbers when they cost a fraction of the Pass Labs XA200 monoblocks that we recently sold and didn’t even sound half bad. The price and listing here is for one T400 (the other unit has been sold).

The T400 you see here is in fair shape. Some scuff marks here and there and the rear left rack handle is slightly bent due to previous shipping. The amp is a hefty piece so shipping will not come cheap but will come securely packed.

Additional information

Weight 80 lbs
Dimensions 24 × 24 × 16 in



Some scuff marks from use.


Power amp