

Boss RT-20 Rotary Sound Processor, (Used)
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Boss RT-20 Rotary Sound Processor, (Used)
Description
The Boss RT-20 Rotary Sound Processor is a pedal that uses BOSS’s COSM modelling to emulate the behaviour of a rotary speaker system, complete with adjustable horn and bass rotor speeds. It offers four modes of rotary effect (including standard rotary, rock-orientated tones, and UNI-V style modulation) and includes a Drive Type switch so it can be optimised for guitar or keyboard input. The pedal also features various knobs: MODE, RISE TIME (how fast the rotors switch speeds), FAST SPEED, SLOW SPEED, OVERDRIVE, BALANCE (between treble horn and bass rotor), DIRECT LEVEL, and EFFECT LEVEL.
It provides multiple connectors: two mono inputs (INPUT A/B), stereo outputs (OUTPUT A/B), a PHONES jack, a SPEED jack for an expression pedal to control rotor speed in real time, and a DC 9V power input (or it runs on six AA batteries). The input impedance is 1 MΩ, the output impedance 1 kΩ, and it draws about 85 mA when powered at 9V. Recommended load impedance is 10 kΩ or greater.
It has a “Virtual Rotor” display that visually represents the horn rotor (centre) and bass rotor (outer ring) in real time. Its controls include an on/off footswitch, a slow/fast footswitch (to swap rotor speeds), several knobs for shaping the effect, and indicators for power, effect status, and slow/fast state. The pedal measures 173 x 158 x 57 mm and weighs about 1.1 kg.
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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Shipping Information
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Customer Support
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FAQ’s
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Contact Us
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FAQs
How long is the warranty period?
For new products, you will get the full manufacturer warranty. For our second-hand products, we will cover any fault within 4 weeks of the purchase of any guitar. For pianos, that will be extended to 3 months.
What is the estimated delivery time?
We use the 24hr delivery in UK mainlands if it can be delivered by post. For Scotland and Wales, it depends on the area and the distance from our warehouse, but our aim is to get you order to your hands as soon as possible.
For products that cannot be posted, we will arrange the delivery with you to suit your schedule and deliver it to you
Do you offer international shipping?
We usually can ship instruments worldwide. Please get in touch to get a quote
What is the maintinance on your USED products?
- Guitars: Every guitar will be setup to a high playing standard before shipping. The electronics are checked and if there is any issue with guitar, it will be fixed.
- Pianos: Every piano is fully tested to make sure it's fully functional, cleaned, and if it's digital, a facroty reset is performed.
Do you offer assembly and installation?
We offer installation and assembly for pianos, drum kits, or any products that require it for and extra charge. Please get in touch so we can provide you with a quote.

