Rich, deep, stereo sound to go — introducing the AC-33, the world’s first AA battery-powered amp made specifically for acoustic guitar. Portable yet powerful, the AC-33 provides true stereo sound, Guitar and Mic/Line channels, custom-tailored effects, anti-feedback, and a Phrase Looper. But this amp was made to go places no amp has gone before. Thanks to its battery-power capability, the AC-33 lets you take your act anywhere — into the backwoods, onto the streets, or wherever your imagination leads you.
* 30 watts (15W+15W) of natural, stereo acoustic sound through twin speakers * Runs on AC power or eight AA batteries (or AA rechargeable Ni-MH batteries) * Dual-channel configuration: Guitar and Mic/Line channel * Reverb, chorus, and ambience effects (Ambience adds spatial, 3D-type depth to the sound) * Phrase Looper with 40 seconds of record time * Stereo AUX input (connect MP3/CD players, etc), headphone output * Anti-feedback function * Built-in tilt-back stand * Removable battery cartridge for easy battery replacement
Natural, Stereo Sound Equipped with Roland’s latest DSP technology, the AC-33, delivers pure, rich acoustic sound with projection far beyond its size. Its true stereo design (15 watts x 2) enables brilliant stereo/multi-band chorus with “Wide” mode, plus shimmering reverb and 3D-type ambience effects tailored specifically for acoustic guitar.
Strum and Sing The AC-33 provides two discrete channels: Guitar and Mic/Line. Plug in an acoustic guitar and a microphone (or line-level instrument) and mix them separately. Both channels have dedicated controls for volume, multi-band EQ, and chorus. The Mic/line channel offers both XLR and 1/4" inputs. You can also connect an MP3/CD player to the stereo AUX input for play-along practice or performance. Master volume, reverb, ambience, and anti-feedback are provided as well.
Phrase Looper The AC-33’s onboard Phrase Looper lets you record, loop, and jam over your own guitar riffs or incoming audio from the AUX input. Record and loop up to 40 seconds at a time, and amaze your listeners with sound-on-sound performances that you create on the spot.
* Rated Power Output 15 W+15 W (when using the AC adoptor) 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, Equalizer Knobs (BASS, MIDDLE, TREBLE), CHORUS Switch MIC/LINE Channel: VOLUME Knob, Equalizer Knobs (BASS, TREBLE), CHORUS Switch REVERB/AMBIENCE Knob ANTI-FEEDBACK: ON/OFF Switch LOOPER: REC/PLAY/OVERDUB Button, STOP/CLEAR Button AUX IN Controls: LEVEL knob MASTER knob POWER Switch Indicators REC/PLAY/OVERDUB POWER * Connectors AUX IN Jacks (RCA phono type, Stereo miniature phone type) LINE OUT (L/MONO, R) Jacks (1/4" phone type) PHONES Jack (Stereo 1/4" phone type) FOOT SWITCH Jacks (1/4" TRS phone type) DC IN Jack * Power Supply AC Adaptor (included, DC 13 V), Dry battery LR6 (AA) type (alkaline) x 8, or Rechargeable battery HR6 (AA) type (nickel metal hydride) x 8 Current Draw 490 mA Expected battery life under continuous use Alkaline: about 8 hours Nickel-metal hydride: about 9 hours These figures will vary depending on the actual conditions of use. * Accessory Owner’s Manual, AC Adaptor, AC Cord * Options Foot Switch: BOSS FS-5U, FS-6 Connection Cable: Roland PCS-31L * Size and Weight ( excluding batteries ) 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.
0 dBu = 0.775 Vrms
Brand reference number:AC-33
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Yes, it's me again. I'm discovering a bit more. Amplifier tested by my guitar teacher on his classical instruments with Piezo. The lesson lasted only 45 minutes because he played the rest of the time. So, one hour. His comments and critiques. Excellent bass reproduction, balanced harmonies without note jumps in certain chords. No sound artifacts. Clarity and transparency on his classical guitar (handmade by a luthier). In flamenco, no saturation on rumba attacks, for example. Appreciated the looper function and its lightness. Conclusion: he is going to buy one!
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Posted on 01/02/2012
By Stéphane B.
Excellent. I'm amazed. Impeccable quality. I amplified my Flamenco guitar. Impeccable sound. Moreover, playing solo in performance, I can record loops to enrich. Wow. I recommend it. At the risk of repeating myself, 20/20 for service, speed, quality. God save Woodbrass. Excellent year to all.
Certified
Posted on 19/01/2012
By Stéphane B.
Wow!! No words I use this amp with electro-acoustic Flamenco guitar. Impeccable sound. No artifacts, sound faithfully reproduced. Tested with my flamenco teacher (pro musician) he was stunned (I quote). Five stars. Unbeatable Quality/Price
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Posted on 15/01/2012
By Stéphane B.
very good ACOUSTIC amplifier for use at home or in a small group I use it with a classic LA PATRIE hybrid
EXCELLENT!!!! its small size makes it discreet at home and the stereo sound is perfect
I will buy this again
Certified
Posted on 17/10/2012
By Franck D.
Very good guitar and vocal amplifier, easy, light but a bit expensive. Meets my expectations.
Verified
Posted on 11/06/2020
By locatelli
Quality
Quality / price
Use
An amplifier with really good sound. Well balanced. The weight is ideal for mobility...
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Posted on 01/08/2014
By Julien F.
Nothing to say: AWESOME
Clear and pure sound as I expected
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Posted on 08/12/2014
By Deborah N.
Excellent, great effects, a size that the miss can handle ;) maybe we can reproach it for a somewhat low output volume but for that we would prefer the AC60...
Certified
Posted on 11/06/2012
By Maxime D.
Surprised by the price/power range ratio compared to the AC60
en 
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Verified
