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Boss RT-20 Rotary Ensemble Pedal , this item is no longer available, below are some similar products you may be interested in.

Boss RT-20 Rotary Ensemble Pedal

COSM-modeled Rotary Speaker Emulation Pedal with Overdrive Effects
Item ID: RT20
Sorry, the Boss RT-20 Rotary Ensemble Pedal is no longer available. We've left this page up for reference only.
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Boss RT-20 Rotary Ensemble Pedal
Boss RT-20 Rotary Ensemble Pedal
Boss RT-20 Rotary Ensemble Pedal

The New Standard in Rotary Speaker Simulation!

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From the Beatles to Jeff Beck, Santana to Stevie Ray Vaughan, many guitar greats have embraced the rotary speaker sound onstage and in the studio. BOSS proudly announces the newest member of its Twin Pedal series - the RT-20 Rotary Sound Processor. Employing COSM modeling technology, the RT-20 authentically reproduces classic rotary-speaker sounds. It offers adjustable Rise Time, Horn and Bass seed, Overdrive, and more. And not just for classic twirl, the BOSS RT-20 can be used to create unique overdrive and pulsating effects as well. This pedal sounds amazing, and offers a stunning graphical view of the virtual rotors on its built-in display.

BOSS RT-20 Rotary Sound Processor at a Glance:
  • Classic rotary speaker sounds using COSM technology
  • Easy to connect both guitars and keyboards
  • Stunning virtual rotor display

Classic rotary speaker sounds using COSM technology
Years of intensive research and development have made Roland and BOSS world leaders in modeling technology. Roland's breakthrough Composite Object Sound Modeling (COSM) uses the advantages of multiple modeling methods, and succeeds in accurately emulating existing sounds as well as producing sounds that have never before been created. With the BOSS RT-20, COSM is used to simulate classic rotary characteristics, and beyond. The virtual horn and bass speaker can be independently adjusted, while the BOSS RT-20's unique graphic display provides a real-time view of the rotation pattern and speed.

Easy to connect both guitars and keyboards
Guitars and keyboards alike can be plugged into the Easy to connect both guitars and keyboards. Use the Drive Type switch to optimize the effects for guitar or keyboard. Surround your listeners in animated sound with the RT-20's dual outputs, which enable true stereo effects. Add color by adding an expression pedal (such as the new BOSS FV-500H/FV-500L, optional), which lets you control parameters such as rotation speed seamlessly from slow to fast in real time. The BOSS RT-20's phone jack is handy for private practice and experimentation.

Stunning virtual rotor display
Thanks to its stunning visual display, the BOSS RT-20 might be the most eye-catching pedal in BOSS history. The spinning lights don't just look cool, they also show the audio-rotation characteristics of the RT-20 in real time. The center of the display, illuminated in red light, represents the virtual horn. The outside ring, illuminated in blue, displays the rotation of the virtual bass speaker. It's attractive while also being informative!

BOSS RT-20 Rotary Sound Processor Features:
  • Authentic rotary speaker sounds by COSM technology
  • Slow/fast transition time is adjustable from gradual to rapid change, optional Expression pedal can control speed in real time
  • Onboard overdrive effects
  • Adjustable mix balance between treble rotor and bass rotor
  • 4 types of sounds, from standard rotary speaker effects to rock-oriented tones, UNI-V, and more
  • Guitar/Keyboard switch
  • Dazzling virtual-rotor display
Take your guitar or keyboard for a spin with the BOSS RT-20 Rotary Sound Processor!

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Offer applies only to single-receipt qualifying purchases. Select manufacturers may require that only the manufacturer’s products qualify towards the minimum purchase amount needed to be eligible for promotional financing. Otherwise, an invoice that meets the minimum purchase amount and contains at least one qualifying manufacturer product is eligible for promotional financing. No interest will be charged on promo purchase balance, and equal monthly payments are required on promo purchase until it is paid in full. The payments equal the amount financed divided by the number of months in the promo period, rounded up to the next whole dollar. These payments may be higher than the payments that would be required if this purchase was a non-promo purchase. During the last month(s) of the promo period the required monthly payment may be reduced due to the prior months’ rounding. Regular account terms apply to non-promo purchases. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

Offer applies only to single-receipt qualifying purchases. No interest will be charged on the promo balance if you pay it off, in full, within the promo period. If you do not, interest will be charged on the promo balance from the purchase date. The required minimum monthly payments may or may not pay off the promo balance before the end of the promo period, depending on purchase amount, promo length and payment allocation. Regular account terms apply to non-promo purchases and, after promo period ends, to the promo balance. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

The estimated required monthly payment shown which excludes taxes and delivery equals the amount financed divided by the number of months in the promo period, rounded up to the next cent. During the last month(s) of the promo period the required monthly payment may be reduced due to this rounding. These payments apply only with the financing offer shown. If you make these payments by the due date each month, you should pay off this amount financed within the promo period, if it is the only balance you are paying off. If you have other balances on your account, this payment will be added to any other minimum monthly payments.

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