
CONGRATULATIONS
on your purchase of Dr Swamp, the renowned twin distortion
pedal from T-Rex Engineering.
Dr Swamp gives you two great classic distortion pedals in a single box.
You can switch between rhythm and lead settings, or set it up to deliver
two different lead sounds. the choice is yours – turn the page to see how
it works.

TWIN DISTORTION
Your Dr Swamp pedal is easy to set up – and even easier to use on stage.
The pedal features two identical channels of classic distortion – each
with its own ON-OFF switch.
Hit the left switch and you’ll turn on the left channel. Step on the right
switch and you’ll toggle from the left to the right channel. Whichever
channel you’re on, hit the switch again to turn the pedal off.
BOTH CHA NNELS O F YOUR DR SWAMP HAVE A GAIN, LEVEL
AND TONE KNOB.
GAIN controls the level of distortion for the channel.
LEVEL governs the overall volume – with 1:1 at 12 o’clock.
TONE lets you turn up or pull back on the edge of your dis-
tortion, for extra control over your own sound.
TECHNICAL SPECIFICATIONS
Input Impedance@1KHz Higher than 1M Ohm
Output Impedance@1KHZ Lower than 1K Ohm
Power supply 9V DC (T-Rex FuelTank)
Minimum Power supply Voltage 8V DC
Maximum Power supply Voltage 12,5V DC
Current Draw @ 9V DC 13mA
Maximum Input signal Vp/p 1,5Vp/p
Battery Type 9 V battery 6F22
Battery Life 6 to 9 Hour
External connectors Input Jack. Output Jack, 9V DC Jack
Controls On/Off, Level, Gain Tone
Pedal size incl. knobs (W x H x D) 100 x 55 x 120 mm / 3,9 x 2,2 x 4,7 inch
Weight
(excl. battery and packaging) 0,335 kg/ 11,8 oz

T-REX WARRANTY CONDITIONS
ABOUT T-REX
T-Rex oers a 2-year warranty on all our products. In the unlikely event of a
malfunction, please contact our technical support at service@t-rex-eects.
com before sending us the product for repair. When the product has been
sent to us at sender’s cost, we will repair or replace your product and send
it back to you - free of charge and usually within 3 weeks (shipping not
included). The product needs to be accompanied by a copy of your receipt,
serial number, return address, phone number, e-mail address and a brief
explanation of the problem. Please note that we cannot replace a product
until we have received it here in Denmark.
The warranty is lost if the product has been damaged by alteration, misuse,
accident, or neglect; or if the product has been repaired or serviced by
persons not authorized by T-Rex. Read more about warranty conditions at
www.t-rex-eects.com.
Based in Vejle, Denmark, T-Rex Engineering makes classic and signature eects pedals for the world’s best musicians. Our approach
blends hi-tech innovation with old-world craftsmanship – always
in the service of killer tone.
EU REGULATIONS • ENVIRONMENT PROTECTION
T-Rex accepts and follows the regulations and directives issued
by the EU. We nd these environment protecting regulations very
good, and we are happy to follow them.

ISSUED IN VEJLE, 2008
Lars Dahl-Jørgensen
Founder
T-Rex Engineering ApS, Tel.: +45 75 72 71 81, Fax: +45 75 72 71 98
www.t-rex-engineering.com • mail: info@t-rex-engineering.com
T-Rex Engineering ApS
www.t-rex-eects.com
Sebastian Jensen
Founder