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Boss RT-20 Rotary Ensemble Sound Processor  

Item #: 
1274034492371
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From the Beatles to Jeff Beck, Santana to Stevie Ray, many guitar greats have incorporated the rotary speaker into their rigs. With this in mind BOSS proudly presents the RT-20 Rotary Sound Processor.... Click To Read More About This Product

Price:
$2190.00
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Overview

From the Beatles to Jeff Beck, Santana to Stevie Ray, many guitar greats have incorporated the rotary speaker into their rigs. With this in mind BOSS proudly presents 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 speed, Overdrive, and more. And not just for classic twirl, the 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.

Features
  • Authentic rotary speaker sounds via 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
Specifications
  • Nominal Input Level: -20 dBu
    Input Impedance: 1 M ohms
    Output Impedance: 1 k ohms
    Recommended Load Impedance: 10 k ohms
    Display: VIRTUAL ROTOR
    Controls: EFFECT ON/OFF pedal, SLOW/FAST pedal, MODE knob, RISE TIME knob, EFFECT LEVEL knob, DIRECT LEVEL knob, BALANCE knob, OVERDRIVE knob, SLOW SPEED knob, FAST SPEED knob, DRIVE TYPE switch
    Indicators: POWER(serves also as battery check indicator), EFFECT ON/OFF, SLOW/FAST
    Connectors: INPUT A (MONO) jack (1/4 inch phone type), INPUT B jack (1/4 inch phone type), SPEED (EXP PEDAL) jack (1/4 inch phone type), PHONES jack (stereo 1/4 inch phone type), OUTPUT A (MONO) jack (1/4 inch phone, type), OUTPUT B jack (1/4 inch phone type), AC Adaptor jack
    Power: DC 9 V=Dry battery (R6/LR6 (AA) type) x 6, AC Adaptor (PSA-series)
    Accessories: Owner's Manual, Dry battery x
    Dimensions: W 6-13/16" x D 6-1/4" x H 2-1/4"
    Weight: 2 lb. 7 oz.
Warranty
MANUFACTURER'S WARRANTY
Boss pedals - 5 year parts warranty
90 day labor warranty.
1 year warranty - Multitracks, Jamstations, etc.
Check with manufacturer for specific product warranty.


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  • Customer Reviews
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Review Snapshot

by PowerReviews
BossRT-20 Rotary Ensemble Sound Processor
 
4.7

(based on 47 reviews)

Ratings Distribution

  • 5 Stars

     

    (38)

  • 4 Stars

     

    (6)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (2)

  • 1 Stars

     

    (0)

91%

of respondents would recommend this to a friend.

Pros

  • Excellent sound quality (9)
  • Versatile (9)
  • Responsive (8)
  • Good selection of effects (7)
  • Compact (6)

Cons

No Cons

Best Uses

  • Performances (10)
  • Home studio (8)
  • Professional recording (8)
  • Amateur recording (6)
  • Outdoor events / games (5)
    • Reviewer Profile:
    • Experienced (6), Professional musician (5)

Most Liked Positive Review

 

Leslie in a Box

Did you ever imagine a Leslie rotating speaker that would fit on your pedal board and cost under $1500. The rt-20 is it. This box has four equally awesome, fully adjustable modes....Read complete review

Did you ever imagine a Leslie rotating speaker that would fit on your pedal board and cost under $1500. The rt-20 is it. This box has four equally awesome, fully adjustable modes. 1.Leslie 122 with natural overdrive. 2.Leslie 122 with on-mic setting, giving a tremolo-like effect. 3.Leslie backed by a distorted 59' Marshall. 4. UNI-V, which is a very accurate model of a Univibe. A stunning visual display gives you the actual speed and rotation of the speaker and is very helpful. My favorite feature is the brake, which allows guitarists to stop the rotation of the speaker, while leaving the effect on. The brake, with practice will allow you to have some Hendrix-esque feedback sounds that will definately impress a crowd or will sound great on a recording. When combined with a Vox-wah, the rt-20 is capable of stunning tones. This pedal has far too many other features to speak of, but, suffice to say, the Boss RT-20 is a vital addition to any guitarists pedal collection. P.S. Dont forget to try out the "Wild Spin" setting in the owners manual, it will blow you away.

VS

Most Liked Negative Review

 

Very Expensive Phase Shifter

First of all I OWN a Leslie 145, so I have a benchmark for the sound of Leslie guitar. After waiting a long time for two of these pedals, I must register my...Read complete review

First of all I OWN a Leslie 145, so I have a benchmark for the sound of Leslie guitar. After waiting a long time for two of these pedals, I must register my disappointment in the audio and sonic quality of this pedal for guitar. The real Leslie sound is truly rooted in the horn aspect of the sound for guitar which is a very nasally midrange to high curve with almost the "Q" of a half-depressed wah pedal. The RT-20 fully misses this true characteristic and really sounds dull compared to many other Leslie simulators both old and new. With the "Balance" control set to full "Horn" the treble is bland and lacks the humped frquency response of the actual Leslie horn. There is always too much distortion even with the "Overdrive" in the"off" setting and the mode set to "I" with both single coils and humbuckers when using this pedal. I was hoping to achieve the classic "Badge" sound or something like Leslie West on "Nantucket Sleighride" but no such luck. Just a swishy, ill-defined phase sound that none of the four amps I tried could resolve any better. The Uni-Vibe setting was muddy and also ill-defined, not even as good as the Boss Modeling Wah pedal(PW-10). The RT-20 sounds more like a very sophisticated phase shifter rather than a rotary simulator. The current Line 6 Roto-Machine is far better at making the classic Leslie sounds for guitar--especially when used on the "145" setting.

Reviewed by 47 customers

Displaying reviews 1-10

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5.0

FANTASTIC EFFECT FOR KEYBOARDS & GUITARS!

By onemanband

from port st lucie , fl

About Me Professional Musician

Verified Buyer

Pros

  • Compact Design
  • Excellent Sound Quality
  • Good Selection Of Effects
  • Responsive
  • Versatile

Cons

    Best Uses

    • Amateur Recording
    • Events
    • Home Studio
    • Performances
    • Professional Recording

    Comments about Boss RT-20 Rotary Ensemble Sound Processor:

    THIS WILL ENHANCE ANY KEYBOARD OR GUITAR GIVING THEM A TRUE LESLIE EFFECT WITHOUT THE CARTING & WEIGHT OF THE LESLIE SPEAKER! I USE IT WITH ALL MY KEYBOARDS & DIGITAL ACCORDION. GREAT FOR ELECTRIC PIANO & ROCK GUITAR SOUNDS AS WELL. YOU CAN REALLY GET CREATIVE WITH THIS. LIGHTWEIGHT , YET DURABLE STURDY CONSTRUCTION. WORKS WITH 6 AA RECHARGEABLE BATTERIES! INSTEAD OF MORE EXPENSIVE 9V. PRICED WAY BELOW IT'S CLOSEST COMPETITORS GOING $400 OR MORE.

    (2 of 2 customers found this review helpful)

     
    5.0

    Best Bang-For-Your-Buck Leslie Simulator

    By Screamin' Armadillo

    from TEXAS

    About Me Experienced

    Pros

    • Accurate Simulation
    • Adjustable Parameters
    • Light Show
    • Sturdy

    Cons

    • Distortion Effect

    Best Uses

    • Amateur Recording
    • Atmospheric Vocals
    • Guitar
    • Keyboard
    • Performances
    • Professional Recording

    Comments about Boss RT-20 Rotary Ensemble Sound Processor:

    Inspired by the sweet funky lead guitar tones of the Arc Angels song "Good Time", I started a quest for a good Leslie simulator that took me almost 15 years to complete.
    I tried (and even bought) several effects over the years, but found all of them extremely lacking in one way or another.
    When I found the Boss RT20, I was impressed by (1) the overall warmth and tone, (2) the ability to adjust the level(s) of the Horn and Rotor, as well as inject more of the Dry signal if need be, and (3) the low noise threshhold.
    The various Modes (I, II, III, IV) are useful due to how different rooms affect your tone; a bouncy, bright room worked better with Mode II. A dark, "dead" room worked better with Mode I, etc. (your results may vary).
    The "Brake" function works great, very close to the actual brake action of a real Leslie (I like how it ramps up and dow, and has a control of how fast that ramping is).

    I have dialed in reasonable sonic facsimiles of SRV's "Cold Shot", Clapton's "Badge", Harrison's "Let It Be" and Jimmie Vaughan's "Tear It Up" and "Tip On In" tones...as well as my own "Travis County Line" and "I Love You (But Yo Momma's Gotta Go)"

    A multi-instrumentalist (drummer/guitarist/keyboardist/bassist/singer/producer) within our group has used the pedal with his lower-end Yamaha keyboard, and got great results; after mixing the song, you would think there is an acual Hammond B-3 or C-3 in the band.

    Some people have criticized the Uni-Vibe setting; I'll admit it isn't perfect, but I've heard much, much worse. (Although, I admit I'm not much of a Uni-Vibe user, so take my non-criticism with a grain of salt).
    I personally like the spinning light show--it allows you to "see" the speed of the settings.
    The only criticism: The distortion effect should never, ever, ever be turned on. It turns the entire effect into a steaming pile of elephant droppings. It's not even a "good" bad.

    There are perhaps better Leslie effects out there (I've played through the Strymon and was suitably impressed), but for the money, this one is definitely a keeper.

    Is this as good as a real Leslie 122 or 145 or Vibratone?
    Probably not, but this costs and weighs significantly less--especially considering how I normally only use this effect for two to three songs throughout the performance.
    The final cherry on top of the sundae: The lovely Lady Armadillo bought this pedal for me for our wedding anniversary.

    (1 of 1 customers found this review helpful)

     
    5.0

    When Motion Sound broke down...

    By "Detroit" Mike

    from Las Vegas NV

    About Me Professional Musician

    Pros

    • Compact Design
    • Excellent Sound Quality
    • Good Selection Of Effects
    • Responsive
    • Versatile

    Cons

      Best Uses

      • Events
      • Home Studio
      • Performances
      • Professional Recording

      Comments about Boss RT-20 Rotary Ensemble Sound Processor:

      I have used a Motion Sound Pro T3 with my Korg CX-3 organ for many years. Loved it! But finally it was going to cost more to fix than buying a RT-20.

      The Youtube videos showed that it could do a great job for keyboardists not just guitarists looking for a compact, inexpensive Leslie like effect.

      This unit has delivered that to me in spades! Did not expect a simulated rotary sound to replicate the rotary sound so well!

      Have used it in recording and live already! Great construction and love the visual rotary even more. The Motion Sound required me to look back to see if it was on fast. The RT-20, is at my feet and easy to get a visual on whether I am on fast or slow. For what I paid, I am amazed.

       
      5.0

      Just what I'd hoped for.

      By Mike

      from Brooklyn, NY

      About Me Experienced

      Pros

      • Excellent Sound Quality
      • Good Selection Of Effects
      • Responsive
      • Versatile

      Cons

        Best Uses

        • Home Studio
        • Performances

        Comments about Boss RT-20 Rotary Ensemble Sound Processor:

        Rotary speaker simulator. It does exactly what it says it does. Set a slow rotation speed. Set a fast rotation speed. Set the rate at which you want it to transition from one to the other each time you tap the pedal, and you're set! I love the idea of gradually transitioning from a slow setting to a fast setting and back with the tap of a pedal, but I also really love using the RT-20 with the EV-5 expression pedal (not included, but worth the extra cash.) Really fun and more true to the Leslie controls. Some times you want fast, sometimes slow, but sometimes medium is nice. I haven't experimented much with the other features yet, but I'm already very pleased with this purchase.

         
        4.0

        LOVE THIS PEDAL!!!

        By marvin

        from Richmond, VA

        Comments about Boss RT-20 Rotary Ensemble Sound Processor:

        Love this pedal! the speed options and the distortion work well... I use this in a small church where it's not much room for a leslie, and leslie's are costly AS WELL AS HEAVY. with a 1/4 out added to a C2 Hammond organ this pedal has experienced organist looking for a leslie. my only issue that the exp pedal option does not gradually increase/decrease speed, otherwise it would get 5 stars

        (1 of 1 customers found this review helpful)

         
        4.0

        LOVE This!!!!

        By PentecostalHammond

        from Richmond, VA

        About Me Experienced

        Pros

        • Excellent Sound Quality
        • Good Selection Of Effects
        • Responsive
        • Versatile

        Cons

        • Exp Pedal Option Weak

        Best Uses

        • Hammond Organ
        • Performances

        Comments about Boss RT-20 Rotary Ensemble Sound Processor:

        Love this pedal! the speed options and the distortion work well... I use this in a small church where it's not much room for a leslie, and leslie's are costly. with a 1/4 out added to a C2 this pedal has experiened organist looking for a leslie. my omly issue that the exp pedal option does not gradually increase/decrease speed.

         
        5.0

        Gives you the Hammond thing pretty well...

        By Valter

        from Santo Andr���, Brazil

        Comments about Boss RT-20 Rotary Ensemble Sound Processor:

        Hi guys, I have played with a couple of Leslie cabs in the 90s and this thing, when well used thru a good Tube stack, will do its job. With the right amp it will give you the heart shake of the real thing. Thumbs up, will take you to early Deep Purple type of sound.

        (1 of 1 customers found this review helpful)

         
        5.0

        Love it!

        By Mickie

        from Sarver, PA

        About Me Professional Musician

        Verified Buyer

        Pros

        • Compact Design
        • Excellent Sound Quality
        • Good Selection Of Effects
        • Responsive
        • Versatile

        Cons

          Best Uses

          • Amateur Recording
          • Events
          • Home Studio
          • Mobile DJ
          • Performances
          • Professional Recording

          Comments about Boss RT-20 Rotary Ensemble Sound Processor:

          Best purchase I made in along time.

          (3 of 3 customers found this review helpful)

           
          4.0

          Great

          By Jimo slice

          from under the freeway overpass

          About Me Experienced

          Verified Buyer

          Pros

          • Compact Design
          • Excellent Sound Quality
          • Good Selection Of Effects
          • Responsive
          • Versatile

          Cons

            Best Uses

            • Amateur Recording
            • Events
            • Home Studio
            • Performances
            • Professional Recording

            Comments about Boss RT-20 Rotary Ensemble Sound Processor:

            Yoooo

            Works just like you would think. I found that i leave mine on the slow setting 90% of the time. It seems to thicken the tone and adds almost a phaser effect. I got it thinking i would use the fast feature more but the slow speed is just a good ole baseline sound to build from. Adding other pedals with it gets overwhelming fast but i found it takes the place of things like delay and overdrive if you tweak it right. The only true downside is that the gain is OOC, anything past level 3 sounds like a blown sub in a VW bug, just awful. However the 0-3 sweep can be useful. Not a perfect repo of a RT but close enough, especcaly in a band setting it gets the point across just fine. (works in stereo also).

            Overall, it has a great sound, easy to use, get one.

            (3 of 3 customers found this review helpful)

             
            5.0

            WOW!

            By Tubehed

            from Westminster, CA

            About Me Experienced

            Pros

            • Compact Design
            • Excellent Sound Quality
            • Good Selection Of Effects
            • Responsive
            • Versatile

            Cons

              Best Uses

              • Amateur Recording
              • Events
              • Home Studio
              • Performances
              • Professional Recording

              Comments about Boss RT-20 Rotary Ensemble Sound Processor:

              I have always loved the sound of a Leslie. Whether we are talking about a Hammond B-3 or or a Fender Strat, an instrument just sounds more soulful and etherial when played through a rotating speaker system. For years, I tried to approximate this sound by using different combinations of flanger, chorus, phaser and tremolo effects. And, while I would often be able to dial in some cool tones, I always ended up with something that, at best, sounded "Leslie-esque" but clearly not like the real deal. The RT-20 gets me as close to the "real deal" as I will probably ever need.

              When you think about how hard it is accurately simulate a complex electromechanical device like a Leslie and shrink it down to the weight and size of an effects pedal, it is pretty amazing how close this pedal sounds to the real thing. I know purists will argue that the RT-20 can't capture some of the more subtle sonic qualities of a real Leslie-I don't think ANY simulator can because it is physically impossible. That said, I know which device I'd rather lug to practice sessions and gigs!

              I haven't tried the other rotary sims out there, including the Strymon Lex or the H&K Rotosphere. Could they be even better than the RT-20? Maybe. Depending on who you ask, the RT-20 is either superior, equal or inferior to those and other units. All I know is that the RT-20 gives me the sound and features I've always wanted and I am totally satisfied with the Leslie settings on this pedal.

              The Uni-Vibe setting has gotten mixed reviews, with some people dismissing it as "fake" sounding and others describing it as authentic and useful. I think that Boss did a really good job of modeling a Uni-Vibe. You can dial in some pretty convincing tones by adjusting the rate and intensity controls. If you are really particular about Uni-Vibe tone, I would go for a unit that uses actual bulbs, photocells and staggered phasing stages like the original. Also, with both the Leslie and Uni-V settings, I have found that both sound MUCH better when using an overdrive or distortion pedal AFTER the RT-20. The built in overdrive is only useful at lower settings and I prefer to use a seperate OD anyway.

              I have been playing guitar for over 25 years and I have to say that the RT-20 is at the top of my list of favorite effects pedals. If you dig the Leslie sound, you owe it to yourself to check it out.

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