AC-33

Acoustic Chorus Guitar Amplifier

AC-33
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Super Portable, Versatile, Battery-Powered Stereo Acoustic Guitar Amp

Rich, deep, stereo sound to go — introducing the AC-33, the world’s first 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.

New Rosewood Finish!
Now the AC-33 is available with beautiful rosewood-look cabinets, offering an alternative to the standard stage-ready black finish. The attractive woodgrain styling perfectly matches the atmosphere of your living room or studio, as well as the aesthetic of your acoustic guitars.

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.

Specifications
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/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
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)
PHONES Jack (Stereo 1/4-inch phone type)
FOOT SW Jack [EFFECTS] (TIP: CHORUS, RING: REVERB/AMBIENCE) (1/4-inch TRS phone type)
FOOT SW Jack [LOOPER] (TIP: REC/PLAY/OVERDUB, RING: STOP/CLEAR) (1/4-inch TRS phone type)
DC IN Jack
Power Supply
AC Adaptor (included, DC 13 V),
Dry battery LR6 (AA) type (alkaline) x 8, or
Rechargeable Ni-MH battery (AA, HR6) type x 8
Current Draw
490 mA
Expected battery life under continuous use
Alkaline battery: Approx. 8 hours
Rechargeable Ni-MH battery (AA, HR6): Approx. 9 hours
These figures will vary depending on the actual conditions of use.
Accessories
Owner’s Manual, AC Adaptor, AC Cord
Options (Sold separately)
Footswitch: BOSS FS-5U, Dual Footswitch: BOSS FS-6, FS-7
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
In the interest of product improvement, the specifications and/or appearance of this unit are subject to change without prior notice.

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Support

If you have questions about operating your Roland product, please check our Knowledge Base for answers to the most common questions.
You can also contact our Product Support department by phone or email.
In addition, we have a library of Owner’s Manuals and Support Documents that you can download and reference.

Owner's Manuals