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Aclam Dr Robert Overdrive Pedal

The Beatles in a Box



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SKU: AP0020

Product Description

The Beatles fans, come together. Aclam have modelled the Dr. Robert overdrive on the rare Vox UL730 solid-state preamp, used extensively by The Beatles as well as other monumental names like Led Zeppelin and the Rolling Stones. 

You'd be right in thinking the artwork looks familiar - Klaus Voorman is the man responsible, who designed the cover for their iconic Revolver album. You still can't escape Beatlemania in the 21st century.

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Based on the Vox's Normal channel, the Dr. Robert is an uncanny replica of the original used extensively on both Revolver and Sgt. Pepper's Lonely Hearts Club Band. It was the not-so-secret key to their guitar tone.

Only a small number of original UL730 amps have survived to this present day, so you'll be getting your hands on an extremely exclusive tone. The Dr. Robert captures the essence of one of the first hybrid amps ever created. It sounds great either through guitar or bass and performs admirably cancelling out low-end drops.


Controls include your standard volume, gain and middle, with the latter important for shaping the classic scooped British tone when rolled off and adding unprecedented saturation turned up high.

Aclam have added their own "Mach Schau!" custom FET circuit to the mix just for good measure. This mimics the feel of the tube power amp section, saturating things even further and making for a great lead tone. Adjust using the independent volume control.


As with all Aclam pedals, the Dr. Robert features a custom enclosure with side thumb screws to fasten the pedal to Aclam pedalboards and select boards from other brands.

Switching sounds tight and clean thanks to supreme Alpha pots & switches and the finest Wima caps. 


  • Dimensions: 13,6 x 8,7 x 5,5cm (5,4” x 3,4” x 2,2”) with knobs
  • Bypass: True bypass
  • Current Draw: minimum 40mA
  • Power requeriments: 9V DC Center Negative 100mA minimum or a a 9V battery
  • Included: 1 x Anti-sliding rubber pad & 1 x Velcro® pad
Cian Hodge author picture

Written by Cian Hodge

Customer Reviews


14 reviews





Mr. Trevor Heath9th Aug 2023

Value 4Looks 4Durability 4Sound 5

Mr Andrew Barrett16th Nov 2022

Value 5Looks 5Durability 5Sound 5

Mr Stephen Parish27th Aug 2022

More than happy, the tones from this pedal are immense.

Value 4Looks 5Durability 5Sound 5

Mr David Etheridge20th Dec 2021

Value 5Looks 5Durability 5Sound 5

Trusted Customer5th Jun 2021

Very few effective low, mid-60’s drive effect. Can get fairly accurate British Invasion tones with some work.

Value 3Looks 5Durability 5Sound 4

Stephen Robb8th May 2021

Value 3Looks 5Durability 5Sound 5

Trusted Customer10th Apr 2021

Amazing preamp pedal, unbelievably accurate 60s Vox UL730 sounds as well as some amazing fuzz tones and biting natural distortion.

Value 4Looks 5Durability 5Sound 5

Mr. Greg Harley9th Jun 2020

Sounds incredible. Not only does it replicate the sound of the rare1 Vox amp that the beatles used for revolver and sgt. Pepper, it does it perfectly in my opinion. The pedal is also visually stunning with artwork by the original artist of the album cover for revolver and a little bag to keep it in.

Value 4Looks 5Durability 5Sound 5

Mr Peter Jones23rd May 2020

I play through a DV Mark 'Liittle Jazz' amp which is solid state. This pedal sounds horrific through it. I would describe the sound as akin to listening to music through blown headphone speakers. I've listened to many demos of this pedal and it always sound good. Manufacturer recommends playing through a 'British' amp. I think (hope) the problem is my gear so I will invest in a valve amp at some point as I love "that' sound. Difficult for me to give a fair review but I'm sharing my experience that this pedal will not sound good through an ultra clean solid state amp. It needs a valve amp that's already breaking up.

Looks 5

michael g pass18th Jan 2020

It is THAt sound perfect.

Value 4Looks 5Durability 5Sound 5

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Andertons Music Company's Registered Office: 58-59 Woodbridge Road, Guildford, GU1 4RF. Andertons Music Company acts as a credit broker and not a lender and only offers credit products from Secure Trust Bank PLC trading as V12 Retail Finance. Not all products offered by Secure Trust Bank PLC are regulated by the Financial Conduct Authority. Andertons Music Company is authorised and regulated by the Financial Conduct Authority, firm registration number 716155. Credit provided subject to age and status.