
Roland AC-33 (M) Acoustic Chorus Guitar Amplifier

The Roland AC-33 (M) is a compact, battery-powered stereo acoustic amp with deep, rich sound, dual channels, custom effects, and a Phrase Looper for on-the-spot performances.


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Product Description
The Roland AC-33 (M) Acoustic Chorus Guitar Amplifier brings stereo acoustic sound to any location with its battery-powered portability and rich tonal depth. Designed specifically for acoustic guitar, the AC-33 delivers true stereo sound, featuring 15 watts per channel, a multi-band chorus, shimmering reverb, and 3D ambience effects tailored for acoustic instruments. Whether you're on stage or in the great outdoors, this compact yet powerful amp ensures your sound is full-bodied and dynamic, no matter the setting.
With two discrete channels—Guitar and Mic/Line—you can easily plug in both your acoustic guitar and a microphone (or line-level instrument), with separate controls for volume, EQ, and chorus on each channel. The XLR and 1/4" inputs for the Mic/Line channel and the stereo AUX input for MP3/CD players provide flexibility for performances and practice. Plus, the Phrase Looper lets you record and loop up to 40 seconds, enabling real-time sound-on-sound performances.
The new rosewood-look finish adds a touch of elegance to the AC-33, making it the perfect blend of portability, style, and powerful acoustic sound—ideal for home use, street performances, or any creative adventure.
- Flexible Power Options: Can run on AC power or eight AA batteries (compatible with rechargeable NiMH types) for versatile use anywhere.
- Dual-Channel Configuration: Includes separate channels for Guitar and Mic/Line inputs, offering flexibility for various performance setups.
- Built-In Effects: Reverb, chorus, and ambience effects (Ambience adds spatial, 3D depth) to enhance your acoustic tone.
- Phrase Looper: 40 seconds of recording time for looping your performance, adding layers and creativity to live play.
- Stereo AUX Input: Connect external devices like MP3/CD players to the stereo AUX input and use the headphone output for private listening.
- Portable and User-Friendly: Anti-feedback function, built-in tilt-back stand for optimal sound projection, and a removable battery cartridge for easy replacement.
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Product Specifications
Features | |
Rated Power Output | 15 W + 15 W (when using the AC adaptor), 10 W + 10 W (when using the Alkaline batteries) |
Nominal Input Level (1 kHz) | GUITAR Channel: -10 dBu, MIC/LINE Channel: -50 dBu/-20 dBu, AUX IN: -10 dBu |
Nominal Output Level (1 kHz) | LINE OUT: -10 dBu |
Speakers | 12 cm (5 inches) x 2 |
Controls | [GUITAR Channel], VOLUME Knob, BASS Knob, MIDDLE Knob, TREBLE Knob, CHORUS Switch (OFF, SPACE, WIDE), [MIC/LINE Channel], VOLUME Knob, BASS Knob, TREBLE Knob, CHORUS Switch (OFF, SPACE, WIDE), [REVERB/AMBIENCE], REVERB/AMBIENCE Knob, [ANTI-FEEDBACK], ON/O |
Indicators | REC, LAY, OVERDUB, POWER |
Connectors | GUITAR Channel Input Jack (1/4-inch phone type), MIC/LINE Channel Input Jacks, (XLR type, Balanced), (1/4-inch TRS phone type, Balanced), AUX IN Jacks, L, R (RCA phono type), (Stereo miniature phone type), LINE OUT Jacks L (MONO), R (1/4-inch phone type), |
Power Supply | AC Adaptor (included, DC 13 V),, Dry battery LR6 (AA) type (alkaline) x 8,, Rechargeable Ni-MH battery (AA, HR6) type x 8(commercially available), or, Rechargeable Amp Power Pack BTY-NIMH/A(Options (sold separately)) |
Current Draw | 490 mA |
Expected battery life under continuous use | Alkaline battery: Approx. 8 hours, Rechargeable Ni-MH battery (AA, HR6)(commercially available): Approx. 9 hours, Rechargeable Amp Power Pack BTY-NIMH/A(Options (sold separately)):Approx. 16 hours |
Accessories | Owner’s Manual, AC Adaptor, AC Cord |
Options (Sold separately) | Footswitch: BOSS FS-5U, BOSS FS-6, Rechargeable Amp Power Pack BTY-NIMH/A |
Width | 318 mm, 12-9/16 inches |
Depth | 223 mm, 8-13/16 inches |
Height | 243 mm 9-5/8 inches |
Weight | 4.7 kg 10 lbs. 6 oz. |