MESA/Boogie Royal Atlantic RA-100 100-watt Amplifier Head

The Royal Atlantic RA-100 wears an undeniable crown in the TransAtlantic fleet for delivering all this Tone with a big power gut-punch and three amazing Modes of footswitchable performance. Packing 100 watts of EL34 Brit-voiced attitude, this Atlantic takes everything you love about both Fullerton and Liverpool’s amplifier heritage and brings it all together with rich, chest-thumping high gain in the way only a MESA can.


The Royal Atlantic RA-100’s two channels house the three distinctively different footswitchable modes. Each mode is dedicated to a region of musically-useful gain and is capable of truly iconic sounds. These are comprised of CLEAN, LO and HI and they cover the continents with soulfulness, conviction and authority…you need but plot the course and the Royal will take you there.


Amp Type


Chassis Material


Rectifier Type

Silicon Diodes

Rectifier Tubes


Variac Power Switch


Preamp Tubes

6x Mesa 12AX7, 1x Mesa 12AT7

Power Amp Tubes

4x Mesa EL-34 (or 6L6)

Bias Switch for Alternate Power Tubes Types

Bias Select for EL-34 or 6L6

Maintenance Free Fixed Bias


Convection or Fan Cooling

Fan Cooled with High/Low Speed Switch

Number of Footswitchable Channels (or Modes)

Two Channels with 3 Footswitchable Modes

Number of Style Modes


Number of Style Modes Per Channel

Ch. 1 = One / Ch. 2 = Two

Types of Style Modes Per Channel

Ch. 1 = Clean Ch. 2 = Vintage Lo-Gain & Vintage Hi-Gain

Graphic EQ and/or Contour


Global Output Level Control


Global Solo Level Control & Bypassable Options


Tuner Output


External Switching Jack Options and/or Midi

External Switching Jacks for Vintage Low/Hi (Clean is default)

Speaker Outputs

8 Ohm / 4 Ohm Switch with Two Speaker Jacks

Cabinet Simulation - Direct Live/Recording Output


Headphone Output


Slave Output

Yes with Level Control


Mesa Boogie

Mesa/Boogie amps have set the bar for what a great-sounding tube amplifier should be for decades. Known for their pure tube tone, adaptability, and player-friendly performance, these amps can be found on stages and in studios all throughout the world, and for good reason: the best pick the best. Mesa/Boogie continues to be the brand of choice for many pro players thanks to iconic designs like the Dual Rectifier, Mark Series, Lonestar, and Express.