The T-Rex Mudhoney DK is a distortion pedal from Danish maker T-Rex Effects, built as a reproduction of the original Mudhoney circuit. T-Rex describes its character as "raunchy-but-smooth distortion", and the pedal carries the nickname "the yellow one" on the maker's product page1. It sits in T-Rex's Original Collection as "MUDHONEY DISTORTION - the original collection"1.
Raunchy-but-smooth distortion
T-Rex positions the Mudhoney DK as a faithful return to the original Mudhoney, a distortion the maker describes as "raunchy-but-smooth"1. The pedal's slightly aggressive and punchy midrange is paired with a gain mode switch, which T-Rex says gives "great, natural rock grit". The maker describes the switch as almost fuzz-like on high gain settings, and as producing a nastier, growlier rhythm sound on low gain settings1. Players who want more from the same family can look at the later dual-channel T-Rex Mudhoney 2, or at T-Rex's other dirt pedals such as the Dr. Swamp, TwinBlaze, Mean Machine and Dual Drive.
T-Rex states that selected parts in the DK match or surpass the old ones in quality and sound, which is the maker's basis for calling it a reproduction of the original circuit rather than a redesign1.
Controls
The pedal carries five controls, listed by T-Rex as on/off, level, gain, tone and boost1. The on/off control is the footswitch for engaging the effect, while level, gain and tone shape the output volume, amount of distortion and tonal balance. The boost control adds the extra push that works with the gain mode switch to reach the pedal's higher-gain territory1.
Power and connections
The Mudhoney DK runs on a 9V DC supply, which T-Rex lists with its own FuelTank power supplies in mind, or on a 9V battery of the 6F22 type1. The maker specifies a minimum supply voltage of 8VDC, and a current draw of 6mA at 9VDC1. Battery life is rated at 14 to 18 hours1.
The maker specifies a minimum supply voltage of 8VDC. A supply below that rating falls outside the maker's specification, so check the output rating of any supply you intend to use.
External connections are an input jack, an output jack and a 9VDC jack1. The input impedance is greater than 1M Ohm at 1KHz, and the maximum input signal is 1.5Vp-p1.
Specifications
| Specification | Value |
|---|---|
| Power supply | 9V DC (T-Rex FuelTank)1 |
| Minimum supply voltage | 8VDC1 |
| Current draw @ 9VDC | 6mA1 |
| Battery | 9V battery 6F221 |
| Battery life | 14 to 18 hours1 |
| Input impedance @ 1KHz | > 1M Ohm1 |
| Maximum input signal | 1.5Vp-p1 |
| Bypass | True bypass1 |
| Size incl. knobs (W x H x D) | 100 x 55 x 120 mm / 3,9 x 2,2 x 4,7 inch1 |
| Weight excl. packaging | 0,350 kg / 12,3 oz1 |
The pedal is listed on T-Rex's webshop at €109.00 EUR2.
Videos
T-Rex Effects
TheSuperFunAwesomeHappyTimePedalShow
The Guitar Effect
Questions
Does the T-Rex Mudhoney DK run on a battery?
Yes. T-Rex specifies a 9V battery, type 6F22, as the battery option, alongside the 9V DC power jack. The maker lists battery life at 14 to 18 hours, so a battery is a practical way to run the pedal, though a standard 9V DC supply rated between 8VDC and 12.5VDC also works.
Is the T-Rex Mudhoney DK true bypass?
Yes. T-Rex lists the Mudhoney DK as true bypass, meaning the signal passes through the pedal's jacks unaltered when the effect is switched off.
How long does a battery last in the Mudhoney DK?
T-Rex rates battery life at 14 to 18 hours. With a current draw of only 6mA at 9VDC, the pedal is light on power either way.
What does the gain mode switch do on the Mudhoney?
According to T-Rex, the gain mode switch works with the pedal's slightly aggressive and punchy midrange to give great, natural rock grit. The maker describes it as almost fuzz-like on high gain settings and nastier and growlier as a rhythm sound on low gain settings.
What power supply voltage range does the Mudhoney DK accept?
T-Rex specifies a minimum supply voltage of 8VDC and a maximum of 12.5VDC, with 9V DC as the standard operating voltage. The pedal draws 6mA at 9VDC.
How much current does the T-Rex Mudhoney DK draw?
The Mudhoney DK draws 6mA at 9VDC, according to T-Rex's product page, which is a low draw that most pedalboard power supplies can handle on a single output.
Sources (2)
- → T-REX EFFECTS ← Pedals for guitar and bass players!, T-Rex Effects
- Fat Shuga, T-Rex Effects









