The GUPtech Slime Mid-Boost Gold Rush Edition is a one-off, gold-boxed version of the GUPtech Slime Mid-Boost, a compact midrange boost with a 1-band parametric EQ. GUPtech describes the Slime as "a compact, no-nonsense midrange weapon built to push your tone exactly where it needs to sit in the mix"1. The Gold Rush Edition carries exactly the same circuit as the original GUPtech Slime, in a unique gold box2.
The Gold Rush Edition is a single-unit build. GUPtech's page states "Only one will ever exist," and the pedal is listed as sold out2. The standard Slime Mid-Boost remains in stock1.
What the Slime Mid-Boost does
The Slime is a midrange boost and parametric EQ in one1. GUPtech says it is aptly named because "it has a somewhat gooey quality when used as a boost"1. The maker positions it as a tool for a gainy amp's FX loop or preamp rather than the front of a clean rig: "The pedal will shine in the FX Loop of your gainy amp, turning them into a classic and precise Mid-section EQ control"1.
The controls are those of a sweepable parametric band:
| Control | What it does |
|---|---|
| Frequency | Selects between 250 up to 2.5k frequencies to tweak1 |
| Gain | A "remove"/"boost" knob for the chosen frequency, unity at noon1 |
| Volume | Post-EQ volume for the overall pedal level, unity around noon1 |
. In other words, the Gold Rush Edition keeps the original Slime's circuit, and the pedal works as an independently sweepable mid band alongside a larger EQ, or on its own as a mid boost21.
Gold Rush Edition versus the standard Slime
The two pedals differ only in appearance and availability:
| Standard Slime Mid-Boost | Gold Rush Edition | |
|---|---|---|
| Circuit | Original Slime circuit | Exactly the same circuit2 |
| Enclosure | Standard 125B1 | Unique gold box2 |
| Price | £77.00 GBP1 | £109.00 GBP2 |
| Status | In stock1 | Sold out, one only2 |
The Gold Rush Edition sits in a line of GUPtech special editions, such as the FrAG Boost Glow in the Dark Edition, which likewise keeps the original circuit in a new enclosure. Players interested in the wider category can see other options on the Boost Pedals page2.
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Questions
Is the GUPtech Slime Mid-Boost Gold Rush Edition still available?
No. The Gold Rush Edition is listed as sold out on GUPtech's own product page, and the maker states that only one will ever exist. Players who want the same circuit in a standard enclosure can look at the regular Slime Mid-Boost, which GUPtech lists as in stock.
How many Gold Rush Edition Slime pedals will be made?
One. GUPtech's product page for the Gold Rush Edition states plainly that only one will ever exist, making it a single-unit build rather than a numbered limited run. As of the maker's listing it is already sold out.
How much did the Gold Rush Edition cost?
The Gold Rush Edition was listed at £109.00 GBP on GUPtech's product page. For comparison, the standard Slime Mid-Boost is listed at £77.00 GBP on the maker's site.
What does the GUPtech Slime Mid-Boost do?
It is a midrange boost with a 1-band parametric EQ. The Frequency knob selects a frequency between 250 and 2.5k to work on, the Gain knob cuts or boosts that frequency with unity at noon, and the Volume knob sets the pedal's overall output with unity around noon. GUPtech says it shines in the FX loop of a gainy amp.
How is the Gold Rush Edition different from the standard Slime?
Only in appearance. GUPtech describes the Gold Rush Edition as exactly the same circuit as the original GUPtech Slime, housed in a unique gold box. The controls, the frequency range and the parametric EQ function are all those of the standard Slime Mid-Boost.
Sources (2)
- Slime Mid-Boost, GUPtech
- Slime Mid-Boost, guptech.ca








