427 27W 1x12 Tube Guitar Combo Amp

The ValveTrain 427 is an amp with rich vintage tone and an expanded set of controls that allow today's guitarist to access a tonal palette unattainable by its vintage predecessors.

The 427 inherits its tonal roots from the venerable late-1950s Fender 5E3 Deluxe. Aside from the beefed-up power section loaded with a pair of 5881s and the heavy-duty transformer set, the most interesting feature of the 427 is the design of the initial gain stages. There are 2 volume controls, one for the Normal channel and one for the Bright channel. The two channels are internally isolated and jumpered, meaning that the player is able to blend the tonality of each channel into the overall mix. Because the channels are both active, the preamp tube is running in parallel operation, producing more gain than is normally found in an amp of this style.

Turning either volume control down”thus eliminating that channel”returns the tone of the amp back to the single voice operation of the original. There are also two boost switches that activate a gain and low-frequency boost on each channel.

By controlling volume and the boost on each channel, the blending of the two distinct voices opens up the tonal spectrum of the ValveTrain 427.