
St. James 50 Portable Tube Amplifier Line
The Lightest, Most Powerful Tube Amps in the World
Grab-and-go amplifiers with absolutely no compromise on tone. The St. James 50 series are powerful, 50-watt tube amps that are incredibly light, and much lighter than any other 50-watt tube amp you can find.


St. James 50 Portable Tube Amplifier Line
The Lightest, Most Powerful Tube Amps in the World
Grab-and-go amplifiers with absolutely no compromise on tone. The St. James 50 series are powerful, 50-watt tube amps that are incredibly light, and much lighter than any other 50-watt tube amp you can find.

More times than not, when a company is touting a portable amp, what they're really saying is that—thanks to digital modeling—they have an amp that can sound like the classic tube amps you know and love. The St. James series gives you the real deal, starting with pure tube circuitry.
Available in two separate formats, St. James amps offer British-voiced EL34 tube circuitry or American-style 6L6. And from there, you get the cab rig simulator, reactive load power reduction, a USB audio output, and other modern amenities—all in half the weight of a standard tube amp.
Top specs, according to Blackstar, include:
- 50 Watt amps (combo or head and cabinet, 6L6 and EL34 models)
- Less than half the weight of a traditional valve amp (13.22lbs head, 24.25lbs combo)
- USB audio output with Cab Rig advanced DSP cabinet simulator
- Two footswitchable channels and footswitchable channel II boost (footswitch included)
- Power reduction, studio quality digital reverb, and effects loop
Hear how the Blackstar St. James compares to other portable amp heads.