Roland AC-40 Acoustic Combo

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Roland AC-40 Acoustic Combo

Frequently Bought Together

Manufacturer's ID: AC-40

What we say:

The bigger brother of the AC-33 stereo combo, the AC-40 gives a more powerful output from it's custom 6/5" speakers.

It also has automatic feedback control, seeking out the problem frequencies in your sound and slapping them away with a special notch filter circuit. Each of the two channels have their own three band EQ too and separate effects for adding ambient sheen and dimension.

The AC-40 is loud enough for small gigs (and outdoor busking of course!) but you can also use this as a personal monitor in a larger gig setting. This box of tricks is a handy performance aid in so many ways, there's really no reason not to own one!


Onboard stereo effects include a high-quality digital reverb along with Roland’s famous chorus sound, while the anti-feedback function automatically reduces acoustic feedback, so you can concentrate on your performance. Weighing just over 5kg and with extensive connectivity options, the AC-40 is the perfect companion for acoustic musicians on the move.
  • Powerful and lightweight (just over 5kg) 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 inhouse PA sound systems and recording devices
  • Automatic anti-feedback function controls troublesome feedback during live performances
Natural acoustic guitar tone with stereo effects
Roland’s Acoustic Chorus amplifiers are renowned for their pure and natural sound, and are used by acoustic guitarists and singer/songwriters who appreciate a rich, warm acoustic tone. The AC-40 continues the tradition, with dual speakers providing true stereo output plus stereo chorus and reverb effects for studio-quality depth that mono amps just can’t deliver.

Easy to carry at just over 5kg
The AC-40 weighs under 12 pounds (5.3 kg) so although it’s loud, it’s easy to carry around. Despite its small size, it’s perfect for venues such as intimate nightclubs, restaurants, and coffee houses. You can tilt the amp using the built-in stand for improved projection when placed on a flat surface, ensuring your audience gets the full impact of your music. The AC-40’s not just suitable for smaller venues either, it’s also ideal as a personal monitor when performing on larger stages.

Dual-Channel flexibility suits the way you play
The AC-40 has two independent channels; a dedicated GUITAR channel with a standard ¼-inch input, plus a MIC/LINE channel with an XLR/TRS combo input for connecting a microphone or a line-level device. If you’re a singer/songwriter, just plug in your guitar and a mic and you’re ready to perform. Alternatively, you can use the channels to mix two types of guitar pickups (or a pickup and a mic) if you have more than one guitar. However you choose to use the amp, each channel also has its own three-band EQ for sound shaping plus independent chorus and reverb controls, so you can get the sound exactly how you like it.

Eliminate feedback from your performance
If you play live, you’ll know that acoustic feedback is often a problem, especially when you need to push the volume or you’re playing in a confined space. The AC-40 automatically suppresses feedback before it causes trouble, so you can concentrate on getting the right type of feedback; the kind that comes from your audience.

A variety of external connections
The AC-40 is a performance amplifier designed for live use, with a multitude of connections to make your gigs go smoothly. You can easily connect an external music player to the stereo AUX IN for backing tracks or practice, and use the dedicated level control to balance the sound. If you’re playing in a larger venue, mono/stereo LINE OUT jacks let you connect to a PA system, or to a recording device 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.

  • 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
    • VOLUME knob
    • BASS knob
    • MIDDLE knob
    • TREBLE knob
    • CHORUS switch (OFF, SPACE, WIDE)
    • REVERB knob
    • VOLUME knob
    • BASS knob
    • MIDDLE knob
    • TREBLE knob
    • CHORUS switch (OFF, SPACE, WIDE)
    • REVERB knob
    • ON/OFF switch
    • 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, BOSS FS-6
    • 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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Customer reviews

Overall Rating 5 (1 reviews)

Great amp gives a much richer sound to an acoustic

B.W. - 20/5/2015