Hybrid headphones amplifier

If you are after great sound at an affordable price, go out and buy a pair of high-quality headphones. Next, you will need a dedicated headphones amplifier. The one described here combines transistor and valve technology. The combination results in an interesting kind of technological 'synergy', or mutual reinforcement of the strong points ol transistors and valves. A further remarkable aspect of the amplifier is that it has no output transformer.