The entire system runs on 8 AA batteries and should ... to directly drive a 4-8 ohm loudspeaker load. Almost all tube amplifiers require a transformer to match the high impedance of the tubes ...

And it sounds, well, like my hi-fi system. No special “warm ... about its being described as a headphone amplifier by the vendor. A single-ended tube amplifier has a very high impedance output ...

Huge specification. Tiny footprint. That's the pitch for the new Rotel DX-3, a compact headphone amplifier and standalone DAC ...

One big change is the addition of two JAN6418 vacuum tubes, with the M8T featuring both a tube amp and a transistor ... use its own in-house operating system, MTouch, the M8T runs on Android ...

The compact build lets you pick from a raft of licensed preamp modules designed in collaboration with a host of boutique amp brands ...