Bryston's big amplifiers come out of their shipping cartons, get placed on a stand or shelf, and rarely get touched again. There are no moving parts to wear out, just active electronic components doing their thing. A 20 year commitment says this product is built from premium parts, and designed to last a lifetime.
A pair of Bryston 28B SSTē mono block 1000 watt amplifiers, with a 20 year warranty to work perfect, is a serious statement of customer support, and transferable, too. That is a BIG deal. The same 20 year transferable warranty also applies to their new BP26 series preamps. That's a true commitment.
Bryston has a different length warranty period on other products. As an example their new BCD-1 CD player has a three year warranty. I find that acceptable considering the wear and tear of moving parts and the constant human interface during its useful life.
The new Bryston BDA-1 DAC comes with a five year warranty commitment.
I haven't pointed out this great customer commitment by Bryston as an attempt to disrespect any other manufacturers, only to point out what a fine company Bryston is, and what enduring components they manufacture.