AC-40
Acoustic Chorus Guitar Amplifier
COMPACT STEREO AMP FOR ACOUSTIC GUITARISTS AND SINGER/SONGWRITERS
Ideal for gigging guitarists and singer/songwriters, the versatile AC-40 delivers top-quality stereo acoustic amplification in an affordable, mobile package. The latest addition to Roland’s trusted Acoustic Chorus family features clean, loud, and natural sound reproduction for acoustic instruments, with a dual-channel configuration that supports both a guitar and a microphone. Onboard stereo effects include a high-quality digital reverb and Roland’s famous chorus, while the anti-feedback function automatically controls problematic acoustic feedback, allowing you to play and sing with no worries. Lightweight, rugged, and performance-ready, the AC-40 is the perfect solution for acoustic musicians on the move.
- Powerful and lightweight stereo amplifier with natural acoustic tone
- Dual custom-designed 6.5-inch speakers deliver impressive sound levels with superior projection
- Stereo chorus and reverb effects for rich, spacious sound
- Dual channels: GUITAR (1/4-inch input) and MIC/LINE (XLR/TRS input), each with three-band EQ and independent effects controls
- AUX IN with level control for connecting music players
- Mono/stereo LINE OUT for interfacing with house sound systems and recording devices
- Automatic anti-feedback function
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Natural Acoustic Tone, Enhanced with Stereo Effects
The AC-40 carries on the tradition of Roland’s acclaimed Acoustic Chorus series, delivering pure and natural sound amplification for acoustic guitars, vocal mics, and other acoustic instruments. Like the entire AC line, it features true stereo output with dual speakers plus built-in stereo chorus and reverb effects, providing studio-quality depth and dimension that’s not possible with mono amps.
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Big Sound, Compact Size
Ultra-compact and weighing under 12 pounds (5.3 kg), the AC-40 is a breeze to carry wherever you want to play. Though small in size, it has a big sound that easily carries your performance in venues such as intimate nightclubs, restaurants, and coffee houses. Thanks to the integrated tilt-back stand, it’s simple to angle the amp for more projection when placed on the floor or another flat surface. The AC-40 is also ideal as a personal monitor when performing on larger stages.
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Dual-Channel Flexibility
With its two independent channels, the AC-40 gives you pro versatility for any performing setup. There’s a dedicated GUITAR channel with a standard 1/4-inch input, plus a MIC/LINE channel with an XLR/TRS combo input for connecting a microphone or a line-level device. Plug in a guitar and a mic for self-contained playing and singing, or use the channels to mix two types of pickups (or a pickup and a mic) in more sophisticated guitar rigs. Each channel has its own three-band EQ for sound shaping plus independent chorus and reverb controls, giving you complete command over your sound.
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Anti-Feedback
As every live performer knows, acoustic feedback can sometimes be a problem on stage, especially in situations when you need to push the volume or when you’re playing in confined spaces. The AC-40’s anti-feedback function has got you covered, automatically suppressing feedback before it causes trouble. With the simple flip of a switch, you have the freedom to relax and concentrate on performing without worrying about unexpected sound hassles.
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Essential Performance Extras
The AC-40’s rear panel offers a number of connectivity options for a variety of situations. Connect an external music player to the stereo AUX IN for backing tracks and practice, and use the dedicated level control to balance the sound. Mono/stereo LINE OUT jacks give you the ability to connect to PA systems when performing in larger venues, or to recording devices to capture natural sound along with the amp’s rich stereo effects. Plugging into the PHONES jack mutes the internal speakers, letting you practice without disturbing others. A jack is also provided for turning the reverb and chorus effects on/off with optional footswitches.
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- Rated Power Output
- 35 W (17.5 W + 17.5 W)
- 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
- 16 cm (6.5 inches) x 2
- Controls
- [GUITAR CHANNEL]
VOLUME knob
BASS knob
MIDDLE knob
TREBLE knob
CHORUS switch (OFF, SPACE, WIDE)
REVERB knob
[MIC/LINE CHANNEL]
VOLUME knob
BASS knob
MIDDLE knob
TREBLE knob
CHORUS switch (OFF, SPACE, WIDE)
REVERB knob
[ANTI-FEEDBACK]
ON/OFF switch
[AUX IN]
LEVEL knob
MASTER knob
POWER switch
- Indicator
- POWER
- Connectors
- GUITAR CHANNEL INPUT jack: 1/4" phone type
MIC/LINE CHANNEL INPUT jack: XLR type, 1/4" TRS phone type
AUX IN jack: Stereo miniature phone type
LINE OUT (L/MONO, R) jacks: 1/4" phone type
PHONES jack: Stereo miniature phone type
FOOT SW jack: 1/4" TRS phone type
DC IN jack
- Power Supply
- AC Adaptor
- Current Draw
- 480 mA
- Accessories
- Owner's Manual
AC Adaptor
Power Cord
- Options (sold separately)
- Footswitch: BOSS FS-5U, Dual Footswitch: BOSS FS-6, BOSS FS-7
Connection Cable: PCS-31L
- SIZE AND WEIGHT
- Width
- 362 mm
14-5/16 inches
- Depth
- 241 mm
9-1/2 inches
- Height
- 265 mm
10-7/16 inches
- Weight
- 5.3 kg
11 lbs. 11 oz.
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