The Tru-Fi Scream to Eternity Compact Series is an overdrive pedal that puts two complete circuits in one box: a faithful copy of the Ibanez TS808 Tube Screamer and the boutique Eternity overdrive, side by side and switchable in an instant1. A single toggle moves between the two, so one pedal covers both the classic buffered, mid-forward Tube Screamer voice and the more open, unbuffered Eternity sound without touching your settings elsewhere on the board.
Tru-Fi describes it as "the overdrive pedal we've always wanted to build," and the design leans on the company's history: back in the 1990s it was modding TS808s for players who wanted more gain, character and push, which is where the pedal's Brown mod comes from1.
Two circuits, one pedal
The 808 side stays true to the original, in Tru-Fi's words "buffered, warm, and singing with that unmistakable mid-forward push"1. The Eternity side removes the buffer entirely, which Tru-Fi says opens the signal path for a broader, more transparent sound, slightly darker but more dynamic and alive1. For a player, that is the practical difference between the two halves: one keeps the Tube Screamer's input buffer and mid hump, the other lets more of the guitar's own character through.
The TS808 it is based on needs little introduction. GuitarPCB's technical analysis calls it "the most famous overdrive guitar pedal," and Guitar World's buying guide rates it "one of the all-time most popular overdrive pedals," versatile enough to work in any genre, simple to use and very effective23. In a Guitar Player interview, Joe Bonamassa called the TS808 "one of the guitar world's first overdrive pedals"4.
"A simple toggle switches between them, and once you hear the difference, you'll use both."
The Diode Switch: three clipping voices
The diode switch selects between three clipping configurations, which Tru-Fi calls "Where the Magic Lives"1. Because the diodes in the feedback path shape how the signal clips, each position changes both the feel and the output level.
| Position | What it is | How Tru-Fi describes it |
|---|---|---|
| 1S1588 | The original 808 diode, from early production stock, specified by Susumu Tamura, the 808's creator at Maxon | "Tight, focused, and authoritative"1 |
| 1N914 (off-balance pair) | An unmatched pair of silicon diodes | "Sweet, airy, and open... it breathes in a way that makes single notes sing and chords bloom"; Tru-Fi's favorite in development1 |
| LED | LED clipping | "High output, almost no compression... bold and unfiltered," for players who want the gain structure without the squeeze1 |
The 1S1588 position is a notable detail. Susumu Tamura designed the original 808 at Maxon, and Tru-Fi says it tracked down the diode from early production stock to match the 1979 spec1. Maxon's own Tamura-mod TS808 takes a similar approach to vintage accuracy, using component substitutions to match the pedal to its original vintage archetype5.
The Brown mod
The Brown switch engages the mod Tru-Fi developed in the 1990s when it was modifying TS808s for players who wanted more from the pedal. Tru-Fi says the Brown mod "adds roughly 30% more gain and shifts the feel of the pedal completely"1. It works as a push beyond the stock circuit, aimed at the same players who were asking for more gain, character and push from their Tube Screamers back then.
V2: chip access and finish options
The current version, the V2, opens up the op-amp socket. Tru-Fi says "V2 now has the access to the chip IF you wanted to change it," so a player who likes to experiment with different dual op-amps can swap them without modifying the pedal1. The stock chip is the JRC4558, the same as the original 1979 TS808, which is the chip most players associate with the classic Tube Screamer sound1.
The pedal is also available in a custom Sparkle Finish for an extra cost over the standard finish1.
The V2's chip access means you can change the op-amp yourself, but the pedal ships with the JRC4558 installed, matching the original 1979 TS808 circuit1.
Power, enclosure and where it is made
The Scream to Eternity runs on a standard negative-tip 9V power supply or a 9V battery, as pictured on Tru-Fi's product page1. The negative-tip (center negative) convention matches most modern pedal power supplies, so it drops onto an existing board without an adapter.
It is built in Tru-Fi's Compact Mini Series enclosure with the jacks on top, which saves horizontal board space since the cables plug in above the pedal rather than beside it1. Tru-Fi handbuilds each one in Cumberland, Maine, USA, and the pedal is currently back in stock1.
How it fits among TS808-based pedals
The Scream to Eternity is one of several pedals built around the TS808 circuit. Where a stock TS808 gives one fixed voice, this pedal stacks two circuits and a three-position diode switch in one box. Other makers have taken different routes to the same goal: PedalPalFX's PAL808 V2 is an evolved TS-Overdrive Screamer with upgraded components, and Godlyke's Tamura-modded TS808 TubeScreamer targets the vintage original through component substitutions56. The Scream to Eternity's angle is putting the 808 and the Eternity side by side, so the comparison between buffered and unbuffered happens with one toggle rather than two pedals.
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Alberto Barrero
Questions
Does the Scream to Eternity take a 9V battery?
Yes. Tru-Fi says it runs on a standard negative-tip 9V power supply or a 9V battery, and the product photos show the battery option. That makes it easy to power on a small board or standalone, since it accepts the same 9V supply most pedalboards already use.
What op-amp chip does the Tru-Fi Scream to Eternity use?
It uses the JRC4558 op-amp chip, the same chip as the original 1979 Ibanez TS808. That chip is a big part of why Tube Screamer-style circuits behave the way they do, so keeping it puts the 808 side of the pedal on the same footing as the pedal it is based on.
What does the Brown mod do?
The Brown mod adds roughly 30% more gain and, in Tru-Fi's words, shifts the feel of the pedal completely. It traces back to the 1990s, when Tru-Fi was modding TS808s for players who wanted more gain, more character and more push. It is engaged with its own switch.
Can you swap the chip on the Scream to Eternity V2?
Yes. Tru-Fi says the V2 version now has access to the chip if you want to change it. That means a player who likes experimenting with different dual op-amps can open the pedal and try alternatives without fighting the layout.
Where is the Tru-Fi Scream to Eternity made?
Tru-Fi handbuilds it in Cumberland, Maine, USA. The company says the pedal is back in stock, and it is also offered in a custom Sparkle Finish for an extra cost over the standard finish.
Sources (6)
- NEW Scream to Eternity Compact Series, tru-fi.com, 1990
- Tube Screamer Analysis, GuitarPCB
- Best overdrive pedals 2026: mid-hump to transparent tone, Guitar World, 2022-06-07
- Joe Bonamassa Reveals His Most-Used Effects Pedal of All Time, GuitarPlayer, 2022-10-04
- TAMURA-MOD TS808 Tube Screamer (TS808TM), Godlyke, Inc. (maxonfx.com)
- Guitar Pedal X, Guitar Pedal X, 2026-10-12
