AC-90

Acoustic Chorus Guitar Amplifier

AC-90
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The Arrival of a Future Classic

The highly anticipated addition to Roland’s AC-series amp family has arrived! Loaded with high-performance speakers and 90 watts of power, the AC-90 provides a rich, powerful sound while remaining lightweight for easy transport. The AC-90 employs a stereo 2-way speaker system that delivers transparent highs — great for the built-in multi-band stereo chorus — while also providing incredibly powerful low-frequency performance.

Legacy of Excellence

The AC-90 isn’t just any new amp on the block … it’s the long-awaited addition to Roland’s industry-leading AC-series amp family. Roland’s reputation for world-class sound, amazing performance, portability, and top-quality construction in the AC series are all upheld in this stunning new amplifier.

Power Performer

With 90 watts of stereo power (45W+45W) driving top-quality speakers, the AC-90 delivers exceptional full-range performance — from shimmering, crystal-clear highs to full-impact bottom end. This amp is more than capable of cutting though a wall of sound.

Anti-Feedback Control

Enjoy maximum volume without feedback, thanks to the AC-90’s sophisticated ANTI-Feedback feature. This allows you to roam the stage with confidence — even with 90 watts of powerful sound at your back.

Immersive Stereo FX

The AC-90’s onboard stereo effects benefit from Roland’s decades of industry-leading R&D. Experience the amazing spatial depth and lush sound of the stereo multi-band chorus, complete with newly developed WIDE mode. Delay and Reverb are provided as well, and can be controlled via footswitch.

Versatility

In addition to its amazing acoustic-guitar amplification qualities, the AC-90 can also function as a portable PA system thanks to its dual-channel architecture, sub output and phantom-powered Microphone input. Sing and play guitar through one convenient amplifier, with impressive power and full-range performance.

Rated Power Output
45 W + 45 W
Nominal Input Level (1 kHz)
GUITAR Channel: -10 dBu
MIC/LINE Channel: -50 / -10 dBu
AUX IN: -10 dBu
Nominal Output Level (1 kHz)
DI/TUNER OUT: +4 dBu
LINE OUT: +4 dBu
SUB WOOFER OUT: +4 dBu
Speakers
Woofer: 20cm (8inches) x 2
Tweeter: 8cm x 5cm (3inches x 2inches) x 2
Controls
[GUITAR Channel]
PICKUP Switch (PIEZO, MAGNETIC)
SHAPE Switch
VOLUME Knob
BASS Knob
MIDDLE Knob
TREBLE Knob
CHORUS Switch
[MIC/LINE Channel]
PHANTOM Switch
SELECT Switch (MIC, LINE)
VOLUME Knob
BASS Knob
MIDDLE Knob
TREBLE Knob
CHORUS Switch
[CHORUS]
CHORUS Knob (SPACE, RICH, WIDE)
[REVERB/DELAY]
REVERB/DELAY Knob
[ANTI-FEEDBACK]
FREQUENCY Knob
START Button
MUTE Switch
MASTER Knob
POWER Switch
Indicator
[GUITAR Channel]
CHORUS
[MIC/LINE Channel]
CHORUS
ANTI-FEEDBACK
MUTE
POWER
Connectors
[GUITAR Channel]
Input Jack (1/4-inch phone type)
[MIC/LINE Channel]
Input Jacks
(XLR type, balanced, phantom power : DC 48 V, 10 mA Max)
(1/4-inch TRS phone type, balanced)
AUX IN Jacks
L, R (RCA phono type)
L (MONO), R (1/4-inch phone type)
DI/TUNER OUT Jack (1/4-inch TRS phone type)
LINE OUT Jacks
L, R (XLR type)
MONO (1/4-inch phone type)
SUB WOOFER OUT Jack (1/4-inch phone type)
PHONES Jack (Stereo 1/4-inch phone type)
FOOT SW Jacks
TIP: MUTE, RING: ANTI-FEEDBACK (1/4-inch TRS phone type)
TIP: CHORUS, RING: REVERB/DELAY (1/4-inch TRS phone type)
Power Supply
AC 117 V, AC 230 V, AC 240 V (50/60 Hz)
Power Consumption
30 W
Accessory
Carrying Case
Owner's Manual
Options
Foot Switch: BOSS FS-5L (Mute On/Off), BOSS FS-5U, Dual Footswitch: BOSS FS-6, BOSS FS-7
Size and Weight
Width
464 mm
18-5/16 inches
Depth
303 mm
11-15/16 inches
Height
326 mm
12-7/8 inches
Weight
13.9 kg
30 lbs. 11 oz.
* 0 dBu = 0.775 Vrms
*The specifications are subject to change without 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