Roland AC-33 30-Watt Battery Powered Portable Acoustic Guitar Combo Amp


93 out of 100. Incorporating 250+ ratings and reviews.

Street Price: 

Roland AC-33

Meta Analysis Overview

Our rating of 93/100 is based on analysis of 250+ sources comprised of online reviews and discussions. Under the Pros and Cons headings below you'll find a condensed analysis of what those owners and users have been saying. Feel free to ask questions or add your thoughts in the comments section.

NB: This is currently on our recommended list of The Best Acoustic Guitar Amps.

Roland has a great reputation for making high quality transparent instrument amplifiers and in the past they produced some of the highest rated keyboard amps and that experience translated well to their acoustic amps.

Their AC (Acoustic Chorus) line carries their brand of crisp and clean tone, tweaked to better match the frequencies produced by acoustic guitars and other acoustic instruments.

The 30-Watt AC-33 is a highly rated stereo 2-channel acoustic guitar amp that comes with the added bonus of being able to be run on battery power making it ideal for street performers.

One channel is dedicated to guitar and the other is for microphone input. It also has a built-in 40 second phrase sampler / looper.

And as expected from Roland, this amp comes with built-in chorus, along with reverb and anti-feedback.

It is also available in a Rosewood colored finish in addition to the black version pictured here.


  • 2 Channels
  • Built-in tilt-back stand
  • Built-in Chorus and Reverb
  • Built-in 40 second Looper
  • Optionally battery powered
  • Anti-feedback function


  • Power Rating: 15 + 15 Watts with AC power and 10 + 10 Watts using batteries
  • Amplifier Type: Solid State
  • Channels: 2
  • Master Volume: Yes
  • Inputs: 1 x 1/4" Instrument, 1 x XLR Mic, 1 x 1/4" TRS Line, 1 x 1/8" Aux, 2 x RCA Aux. 2 x 1/4" Footswitch jacks for looping and effects
  • Outputs: 2 x 1/4" line level (Left and Right), 1 x Stereo 1/4" Headphone out
  • Controls: Instrument channel- Volume, Bass, Mid, Treble, Chorus Switch; Mic/Line- Volume, Bass, Treble, Chorus Switch
  • Speakers: 2 x 5"
  • Weight: 10.36 lbs
  • Dimensions: 12.52" x 8.78" x 9.57"


Users with guitars equipped with Piezo pickups love the amp for its natural sounding tone without bringing the "brittleness" that some amps have when paired with the pickup type. The feedback control is said to be well implemented and does not affect the guitar's tone in a negative way. The amp's light weight makes it a great companion amp for traveling and touring. Many customers have praised the quality of the sound, and in addition to that the anti-feedback system, effects, and build quality were also well liked. The ability to run on batteries also got a lot of thumbs up from musicians who are always on the go and the availability of mic inputs make this a nifty busking amp.


A few commented that the mic input is slightly weak so less sensitive mics may need additional gain. This may present a problem for noisier venues since the added gain will also amplify noise. The lack of phantom power was also an issue for some users with condenser microphones. It may not be loud enough for larger venues even for stage monitoring. Some wanted a footswitch to be included to make most of the amp's many features.


Though the inherent power limits the size of the venues it can be used at, the Roland AC-33 Acoustic amp is great for coffee shop gigs or small outdoor events where you won't need to be loud. Because small venues like cafes are prone to acoustic feedback, the anti-feedback control does a great job of avoiding ear-splitting microphonics during performances. The built-in 40-second looper enables harmonies and layering; a feature not found on other amplifiers in this class though you will need to purchase a separate footswitch to operate it during playing.

The AC-33 is currently on our recommended list of The Best Acoustic Guitar Amps and you can learn more about it here.

About the Author

Alexander BrionesAlexander Briones

He's written about and researched music gear for many years, while also serving as a music director at his local church, in addition to teaching guitar, bass and mentoring young musicians.