Roll over image to zoom in

View large image

Roland Cube-20GX Guitar Amplifier

  • Dawsons Delivery Delivery: FREE
Stock Checker v
In stock and ready to dispatch!
  • The Roland Cube-20gx Amplifier has a range of channels and effects sections to shape your sound
  • 20-watt guitar amplifier with custom-designed 8-inch speaker
  • Three channels with 3 independent effects sections
  • 3-band EQ & built-in tuner
  • Auxiliary in and out for recording and jamming along with backing tracks
  • i-CUBE LINK jack iOS audio interface (cable included)
  • Free CUBE JAM app for iOS devices
  • Provides plenty of volume for jamming on your guitar whenever inspiration hits
Finance Options
  • More Info
    • Purchase Price
    • Deposit to Pay
    • Monthly Payments of
    • Amount of Credit
    • Total Repayable
    • Duration of Agreement Mths
    • Rate of Interest (Fixed)
    •  APR Representative
    • + Finance Information

  • Flexible finance available on orders over £250
  • Easy application online
  • Spread your payments over 12, 24 or 36 months
retail finance
More Info
Delivery & Returns

Delivery to UK mainland addresses* is FREE on orders over £75 and up to 30kg. (As a guide, a standard electric guitar weighs approx. 3-5kg).

Delivery on orders below £75 are charged at £4.45!

Delivery to Northern Ireland, the Scottish Highlands & Islands, Isle of Man, Isle of Wight, Channel Islands and the Republic of Ireland. is weight dependant and will be indicated at the checkout

Delivery above 30kg to ANY location will vary according to weight and will be indicated at the checkout

LocationPriceStandard Delivery
UK mainland*FREE on orders over £75 £4.45 on orders under £751-3 working days
Northern Ireland, Scottish Highlands & Islands Isle of Man Isle of Wight Channel Islands Republic of Ireland£12.95 – any order value up to 30kg Over 30kg - please call1-3 working days
OverseasPlease call for detailsPlease call

Full delivery information

Returns Policy



The go-to amp for forward-thinking versatility, unrestrictive sound sculpting and rugged design, Roland’s latest Cube is better than ever, introducing the Roland Cube-20GX Guitar Amplifier.

Three Independent Channels

The Roland Cube-20GX Guitar Amplifier is seriously versatile with three channels (JC Clean, Lead, Solo) arming you for any musical genre.

  • JC Clean replicates the coveted sound of the JC-120, and gives you an independent volume control.
  • Lead gives six tones to choose from: Extreme, Metal Stack, Metal, Distortion, Overdrive & Acoustic Simulator. This channel has independent gain and volume controls.
  • Solo is a fully programmable channel, which lets you store your settings from the JC Clean and Lead channels, along with any assigned EQ and effects, to be recalled on demand.

Each of the above can be selected either from the front panel switches or with the Boss FS-5U or FS-6 footswitches (sold separately).

Effects Section and Tuner

With three individual effects sections, comprised of EFX, Delay and Reverb, getting the sound you want from the Roland Cube-20GX is easy. What each effect section has to offer is outlined below:

  • EFX: Chorus, Flanger, Phaser, Tremolo, Heavy Octave
  • Delay: Warm, Clear
  • Reverb: Spring, Plate

In addition to all these effects, the amp is also equipped with a 3-band EQ and an onboard chromatic/manual tuner.

Built-In Interface for iOS Devices

Fitted with Roland’s i-Cube Link interface, the Roland Cube 20GX Guitar Amplifier allows you to fully integrate your iOS device (iPhone, iPad, iPod touch) into your playing, with the included cable. This addition provides two-way communication between your device and the amp, so you can play music tracks stored on the device through the amp, play along with them using the amp’s tones and effects, and record the results on a recording app.

Even if you don’t have an iOS device, the i-Cube Link is still useful as it also acts as a simple stereo input, allowing you to plug a music player or audio device into the Roland Cube-20GX, to play backing tracks through the speaker.

Roland Cube Jam

With the Roland Cube 20GX Guitar Amplifier allowing you to hook up an iOS device, Roland have developed a free app, Roland Cube Jam, which makes jamming, recording and learning easier.

Your favourite songs and minus-one tracks can be played through the amp via Cube Jam, you can play along with all the amp’s tones and effects, and record your session with just one touch. Once recorded you can alter the volume of your playing and the backing track independently and export the results to a 16-bit, 44.1 kHz WAV file.

Used with the Roland Cube-20GX, the Cube Jam app is also a powerful learning tool, with the ability to alter the speed and pitch of audio playback and its Centre Cancel function that allows you to remove solos.

ModelRoland Cube-20GX Guitar Amplifier
Dimensions (H x W x D) 384 x 378 x 221 mm
Weight 7.6 kg
Speaker 1 x 8"
ConnectivityInput Jack: 1/4-Inch Phone Type, I-Cube Link/Aux In Jack: 4-Pole Miniature Phone Type, Recording Out/Phones Jack: Stereo 1/4-Inch Phone Type, Foot Sw (Tip: Jc Clean/Lead, Ring: Solo) Jack: 1/4-Inch Trs Phone Type, Ac In Jack
Controls Power Switch, JC Clean Button, Lead Button, Solo (Memory) Button, Tuner Button, Bass Knob, Middle Knob, Treble Knob, Efx Knob (Chorus, Flanger, Phaser, Tremolo, Heavy Octave), Delay Knob (Warm, Clear), Reverb Knob (Spring, Plate), Master Knob, Volume Knob, Type Switch (Acoustic Sim, Overdrive, Distortion, Metal, Metal Stack, Extreme), Gain Knob, Volume Knob
Customer Reviews
Great Sound and Features
Posted on 17/02/2015 by JMan I haven't had a guitar amp for about 15 years. Used to have a large Marshall Valve amp. Bought this in Dawsons Reading store. I am over the moon with it! At the moment, using my Takamine Electro Acoustic with it (EN20C). The sound is awesome. This amp is a good size, plenty loud enough for home/ jamming. It has some great in built effects and easy to use. The tuner is spot on. I look forward to buying a new solid electric guitar to try out properly the lead channel and its effects. Highly recommend this amp. It's outstanding and great for the money paid.

Write Your Own Review

Write Your Own Review

1 1 star
2 2 star
3 3 star
4 4 star
5 5 star
Overall Rating