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Gurus DOPPOLER (Real Rotating Speakers Simulator)

Gurus DOPPOLER (Real Rotating Speakers Simulator)


Inspired by the old-yet-innovative rotary speaker systems, like the old Maestro Rover, Leslie, and mostly the “Doppolas rotary speaker” made by Mr. Gilmour & Mr. Taylor.

With the DOPPOLER, we wanted to make a pedal that really reproduce the rotary effect in a physical way, just missing the mechanical parts.

In fact, the Doppoler is NOT a “rotary simulator” but the brain of a system that in his best setting is made of two cabinets, positioned at 180° from each other, to let the Doppoler handle it reproducing what happened to signal when the speaker is rotating. We paid a lot of attention, measurement, tests, to exactly understand and reproduce what happens to the signal coming to our ears with a rotary speaker. This meant to apply eq filters, phase changing, volume changing, and calculate how reflections reacts and affect all of this.

Indeed, the signal coming out from Front and Rear speaker are quite different from each other, cause they are already made to do their job in the correct position. Speed sets the speed of rotary effect, and can also be set by the TAP tempo footswitch. Level sets the level of rotary effect and the ambient. The result, is an outstanding tridimensional sounds that will force you to keep it always ON, even with low speed and intensity without notice the rotary effect, just adding ambient and 3D to your sound.

A very transparent Tube preamp make your sound great respecting your instrument, and you can easily add an overdrive pedal in front of it like our Sexydrive mkII with his blend option, to add beautiful drive to your Organ sound. What we keep in mind designing the DOPPOLER is the ambient and 3D sound, people asked me to do some kind of “leslie simulator” for years, and i’ve always replied that i don’t want to make a simulator of an instrument where the acoustic component of the sound was so important.

So we started designing it from the acoustic point, wanting to keep it intact and the base of our system, then we designed our circuit to reproduce what happens between the cabinet and our ears. So far from a simple tremolo/rotating simulator. You can easily use it in your pedalboard in front of your amp, and easily add just an additional speaker behind your main speaker.. maybe an active cabinet, a combo amp, or using one of our Miniamp to drive a guitar Speaker.

General Details
Power In: 12VDC (negative TIP)
Consumption at 12V: max 300mA
Input Impedance: <=1M Ohm
Output Front Impedance: <=10K Ohm
Output Rear Impedance: <=10K Ohm
S/N ratio: <90db
Distortion: max 2%THD
Estimated tube Life: Up to 5000Hrs.
Width: 90mm. (3,5”)
Length: 130mm. (5,1”)
Height: 50mm. (2”)
Weight): 0,7Kg. (1,5lbs)




How much is delivery?
At Ivor Mairants Musicentre we offer thousands of products that are currently in stock and can be delivered to your home address, anywhere in mainland UK. You will be able to see your delivery charge at the "Checkout" page.

Do you offer Next Day Delivery?
Yes, we offer a Next Day Delivery service for in-stock orders placed before 1pm Monday-Friday. Next Day Delivery and Saturday Delivery carries an extra charge. Ivor Mairants Musicentre commit to delivering on time, we rely however, on our carriers to fulfil their contract in this regard, and can not be held liable for any failure of third parties in fulfilling delivery expectations.

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If it proves impossible to deliver your goods within the time allowed by our contract carriers, the consignment will be returned to us and you will unfortunately become liable for all redelivery, and/or redirection charges. Please check your confirmation email for the status of your goods before contacting us. Should you need to change your details, for example you have moved house, you can change your details by email at info@ivormairants.co.uk and the new information will be updated within 24 hours. Please note that any orders placed before changes are made will use your old details.

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  • Only 2 left in stock
Our Price £269.00