Aclam Dr. Robert Overdrive Effect Pedal
NEW - This amp in a box pedal was designed to be the closest replica of the VOX UL730 preamp’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. Artwork made by Klaus Voormann (The famed artist behind The Beatles Revolver album cover) gives this pedal a unique look.
IN STOCK AND READY TO SHIP!
More Info
Volume: Independent volume control for the Mach Schau! section.
Middle: This is the most critical knob to tailor your sound. Unlike most equalizer circuits (which get placed after or before the volume control) Vox separated the mids control from the rest of the tone stack in the UL730. In this preamp the signal gets amplified first, followed by the Middle control before the volume pot. After this, Vox placed a special gain stage coupled with the Bass and Treble controls. Thus, you can control the midrange without interacting with the rest of the eq, as traditional tone stacks do. By turning it counterclockwise, it will subtract a great amount of mid-range, creating a really interesting scooped sound. Turning it clockwise will bring mid frequencies and the overall gain builds up hitting harder the EL84 tubes, creating saturation. Just like the real amp does, Dr. Robert’s “Middle” control has the same behavior thanks to the FET section specially tuned to mimic the power amp saturation on the UL730. So, keep in mind, the “Middle” knob will have a great effect on the overall saturation of the unit.
Gain: This control is placed in the same position of the circuit as the original UL730’s volume control. Since none of the Vox® UL series had a master volume control the user had to turn it all the way up to bring the amp into saturation, and believe us, this thing is loud. To solve that we put the Vol control at the end of the FET section so now, the volume control on the original amp turns into a gain knob on the Dr. Robert. At lower settings the Gain knob will produce a clean tone, but as you approach the 12’o-clock mark the FET section will start entering the saturation region. Have in mind that due to Dr. Robert’s great dynamics, different types of guitars and pickups will affect the clean range of the Gain knob.
VOL: Controls the overall volume of the Dr. Robert when you’re not using the Mach Schau! section.
Bypass switch: Engages the unit allowing the signal to flow through the Dr. Robert circuit. It also lights up the LED above it
Bass: Set the amount of low frequency content reaching the FET section. The Treble & Bass controls work together in a tone-stacked manner, so they are a bit interactive. Both controls are factory set at 12 o'clock.
Treble: Controls the amount of high frequency content of the signal before reaching the FET section. Setting this knob will have an effect over the overall gain.
Mach Schau! Gain Trim: This allow you to lower the saturation and make it a little bit less aggressive. At high gain settings it's less effective but a lower it will make the Mach Schau! sound a bit gentler. Factory setting if fully clockwise.
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 requirements: 9V DC Center Negative 100mA minimum or a 9V battery
Current draw: ≈40 mA
Included: 1 x Anti-sliding rubber pad & 1 x Velcro® pad