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Dr. Robert

The VOX UL730 most accurated replica!


An effect pedal based on the Normal channel of our VOX UL730 S/N: 3042 used by The Beatles in Revolver & Sgt. Pepper albums


This amp in a box pedal was designed to be the closest replica of the amp’s soul and character. A meticulous process of tracing the original tag board circuits and measuring each component’s value has resulted in a sonic approach never reached before.

✔ The most accurate replica of the original VOX UL730 preamp

✔ Artwork made by Klaus Voormann

✔ Mach Schau! function

✔ Circuit tailored for both guitar and bass instruments

✔ Same 3 band equalizer via internal treble and bass trim controls

✔ True bypass relay switching

✔ Smart Track® Fastening System



Internal controls




Aclam demo


Youtube demos



Try Dr. Robert with Tonepedia


Aclam audio samples

Paperback Writer

Epiphone Casino

Gretsch 6120

Gretsch 6120 PepBox

She said she said

Epiphone Casino

Gibson SG


Epiphone Casino

Dr. Robert

Epiphone Casino



Fender Stratocaster

Taxman (solo)

Fender Stratocaster

Sgt. Peppers (Rythm)

Epiphone Casino

Sgt. Peppers (Lead)

Epiphone Casino

Fender Stratocaster


Led Zeppelin - Whole Lotta Love (Solo)

Led Zeppelin - Whole Lotta Love (Rythm)

Joy Division - Shadow Play (Solo)

Joy Division - Shadow Play (Rythm)




Get inspired with Dr. Robert's playlist



What's said?

Users reviews

What customers think about our products?

Dr. Robert

13 Jan. 2023 Rolando Fernandez


Un gran pedal! Llegó antes de lo esperado! Muchas gracias Aclam

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Dr. Robert

22 Dec. 2022 David Sadowski

A Truly Fab Pedal!

For anyone in search of that authentic Beatles '66 sound, this pedal is fantastic! I am very thankful for this, and for all the hard work and effort that went into making it the right way. The Klaus Voormann...

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Dr. Robert

30 Aug. 2022 John DOnofrio

Fantastic tones.

If you play Beatles music this pedal is a must have. The sounds are spot on and you can’t get them anywhere else. I don’t know how the aclam engineers and designers do it but this pedal is magic.

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Dr. Robert

27 Aug. 2022 Cristiano Orlandi

An unexpected surprise

Finding the right guitar tone to recreate the magic the Beatles managed to achieve in the studio, with the help of George Martin and Geoff Emerick, particularly on albums like Revolver and Sgt. Pepper has never been...

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Dr. Robert

18 Aug. 2022 DAVID FELL

Just What the Doctor Ordered

This pedal produced insanely useful tones with great ease. The mids knob can really influence the way my guitars break up in a way that other distortions I've tried do not. The user manual is very informative. The...

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Dr. Robert

12 Apr. 2022 Konnie yoakum

Rhythm Guitarist for The Raves

Dr. Robert pedal from Aclam guitarsLet me start by saying I am not a gear head or pedal junkie. But ever since I heard this pedal a couple of years ago I wanted one... and I love it. Vox amp lovers know the...

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Dr. Robert

06 March 2022 Matteo Foglia

Super cool

Super super cool! The Beatles sound in the fit! Great pedal, great sound, great all! I love

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Dr. Robert

06 Nov. 2020 kane russell

WOW ????

This pedal is amazing !! I ran it through a marshall dsl40cr and it just sounded stellar???????? It also plays great through the vox mini super beetle ... from suttle glossy chime to solid grit this thing is great...

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Dr. Robert

01 July 2020 Chang Ling Fatt

Must own pedal!

I bought the pedal through online store. Customer service is very responsive and friendly. The delivery via Fedex was faster than expected. I played with the pedal non-stop after receiving. It is a faithful recreation...

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Dr. Robert

18 March 2020 Paul Carey

exceptionally good distortion pedal

Sure, there is the direct Beatles influence in designing this pedal, which is part of what made me get it, but there is really much more.Ive always loved those sounds on Revolver and Sargent Peppers and never...

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Dr. Robert

28 Jan. 2020 richard bondel

Dr Robert

It seems like a lot of money for a distortion pedal but it offers something different and it's very well made. You have to remove the back to access the battery compartment, which is time-consuming, but you get to see...

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Dr. Robert

27 Nov. 2019 Ola Göransson

Special pedal

It’s rare that I buy a pedal that gets more than occasional usage. Especially overdrives. This one, however, is So good it could be constantly engaged. With the eq function it is really versatile

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Dr. Robert

08 Nov. 2019 William Richins

Dr Roberts pedal

Another great pedal from a company that exceeds customer expectations.

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Dr. Robert

16 Oct. 2019 Daniel Carollo


great pedal and service

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Dr. Robert

28 Aug. 2019 Richard Lloyd

Great pedal

Sounds amazing and works great. Have yet to run through all it’s paces. Very easy interface. No retreat on this purchase

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Dr. Robert

27 Aug. 2019 Drew Cole

Very satisfied

I’m giving this product a five out of five. The sounds are extremely authentic and paired with the right pick ups it’s dead on perfect. The packaging is fantastic and the box comes with beautiful touches and a...

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Dr. Robert

06 Aug. 2019 Robert Gonzalez

Dr. Robert

Beautiful pedal! Really gets the 7-series sounds I've been chasing all these years. Aclam customer service is excellent!

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Dr. Robert

06 Aug. 2019 Graeme Wells

Dr Robert Rocks

This is an amazing Pedal. Authentic & Versatile. Blown away.

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Media reviews

The Dr. Robert is no one-trick pony. Its overdrive, fuzz, and boost

"The tones within are so close to the Beatles tones I’ve been chasing for decades, and so unique in non-Beatles contexts."

Premier Guitar (Premier Gear)

Read this review 

The Dr. Robert is a bit of an art piece as well

“The cool-sounding is a worthy and interesting addition to anyone’s stompbox collection.”

Guitar Player

Read this review 


Guitar world logo

"Here's your prescription to replicate The Beatles’ Vox UL 730 amp sounds"

"An obscure and largely forgotten amp gets rightly put back on the map in a versatile drive pedal with visceral power and a raw grind that will find a role in many kinds of music."

Guitar World

Read this review 

Sonically, the Dr. Robert is a joyous experience.

“Pushing up the gain yields a surprising amount of grind and sustain. Kicking in the “Mach Schau” boost takes things into another level entirely.”

Interactive Guitar magazine

Read this review 


This pedal is just what the doctor ordered.

“Custom FET circuitry provides the sag and sound of tubes, while the middle control increases the sweet saturation effect.”

Maverick magazine

Read this review 

Not just for Beatles fans, but definitely for Beatles fans.

“The llustration by “Revolver” cover artist Klaus Voorman really brings that spirit and feel of those classic LPs back to life, and the sounds fit perfectly as well”

Pedal of the day

Read this review 


Dr. Robert tech specs

Dimensions: 13,6 x 8,7 x 5,5cm (5,4” x 3,4” x 2,2”) with knobs
Weigth: 410 gr. (0.9 lbs)
Bypass: Relay True bypass
 Power requirements9V DC Center Negative 100mA minimum or a 9V battery
Current draw: ≈40 mA
 Included: 1 x Anti-sliding rubber pad & 1 x Velcro® pad

Download the Dr. Robert user manual


The story behind the Dr. Robert effect pedal

Get immersed & discover the creaton process in the story of a vintage enthusiast and a circuitry master, pursuing the tone that has dazzled countless guitarists around the globe. Learn how this could be achieved in this six-episode documentary full of anecdotes, ups and downs, and eventually the accomplishment of what began as a long-time obsession.


Pursuit of an Iconic Sound,
the Inception of a Long Journey.

Chapter 1

This video marks the beginning of our short serie about Dr.Robert, Aclam’s latest overdrive pedal. In this chapter Marcel and Marc, the two people at the origin of project, take us back to the 60s to explain us how Revolver and the Vox UL series inspired them to create Dr.Robert.

Vox UL series,
Myth or Big Deal? 

Chapter 2

Our serie about Dr.Robert overdrive pedal continues with our second episode, “Myth or Big Deal”. Marcel and Marc, original creators of our latest overdrive pedal, discuss about the importance of Vox UL series for the Beatles and the music industry in general.

Amp Hunting: Speculation,
Scam, and Tomatoes

Chapter 3

In the 3rd episode of our serie about Dr.Robert overdrive pedal, Marc and Marcel, creators of Dr.Robert, tell us about their quest to find the UL amplifier. A long path, full of pitfalls, scams, and a lot of patience. Was it a happy ending?


Restoration and
Tonal Harvesting 

Chapter 4

The creators of Aclam’s Dr.Robert overdrive pedal are back in action in the 4th episode of our serie. Now that they have finally acquired the amplifier they were looking for, Marc and Marcel can start the restoration process.

Contextualizing the Tone

Chapter 5

Discover in the 5th episode of our serie about Dr.Robert overdrive pedal how Aclam came up with the name Dr.Robert, and the branding process featuring Klaus Voormann, the iconic designer from the Revolver album.

Fitting Pieces Together

Chapter 6

After a year working on the project, Dr.Robert overdrive pedal creators tell us about the challenges and experiences met during the creation process. A great journey that started in Barcelona, but that’s taken inspiration from a lot of places. Discover it now in the 6th and last episode of our serie.


If You Have A Dr. Robert...

Tag your videos & pictures with the hashtags #mydrrobert & #myrigmyrules in social media to get featured!


Have you got further questions?

You can contact us through the form below and let us know whether
you have any special request.