Boss launched its compact pedal line in 1977 with the yellow OD-1 Overdrive, the PH-1 Phaser and the SP-1 Spectrum. The orange DS-1 Distortion joined them the following year and has never left the catalog. Boss calls it the best-selling compact pedal it has ever made, with well over a million sold, so there are always plenty on eBay. From the outside nearly all of them look the same. What changes is inside the box, along with the country printed on the label, and that's what this guide helps you read.
Who played one
Every era of the DS-1 has its fans. Producer Jack Endino told Guitar World that Kurt Cobain used a DS-1 on Nirvana's Bleach in 1989, so the 1980s pedals carry the grunge story. Joe Satriani started using one live after Surfing with the Alien took off, and Steve Vai's longtime tech said the DS-1 was Vai's main pedal from 1999 on. George Lynch has called it his default distortion since the 1980s, and John Frusciante and Khruangbin's Mark Speer are fans too. In other words, a later DS-1 is a working pedal that pros still use, and the early ones have the collector story.
The three circuits
The DS-1's circuit has changed at the chip, and that's the date that matters most for sound. The original 1978 design was built around a Toshiba TA7136AP, a preamplifier chip rather than an op-amp. By 1994 Toshiba's chips were running out, so Boss redesigned the circuit around a Rohm BA728N dual op-amp. In 2000 the Rohm chip gave way to a Mitsubishi M5223AL, which is still in the pedal today.
Guitar World describes the pre-1994 pedal as open and fairly flat in its EQ, and it stacks well with other drive pedals. The 1994 redesign came out quieter, and at high gain its tone control can't tame a fizzy top end. That's a big reason a whole cottage industry of DS-1 modders grew up, and the pedal became a favorite platform for builders like Analog Man and Robert Keeley. If you're chasing the sound of the 1980s records, you want the TA7136 circuit.
Where it was made
Early DS-1s were made in Japan. Boss then moved compact production to Taiwan, and the sources don't quite agree on when. Analog Man says Boss moved production out of Japan in the 1980s, while Wikipedia puts the move around 1990. Malaysia came later. Analog Man says the 2017 and newer pedals are usually Malaysian, and Wikipedia dates the main move from Taiwan to Malaysia to around 2019.
Put those dates next to the chip change and you get the most useful fact in this guide. Taiwan production started before the 1994 redesign, so the first years of Taiwan DS-1s still carry the original TA7136 circuit. A Made in Japan DS-1 is the one collectors want, but an early Taiwan pedal can give you the same circuit. A photo of the board settles it.
Reading the board
Ask the seller to take off the bottom plate and photograph the circuit board. You're looking for three things.
- The chip marking. TA7136AP means the original circuit. BA728N means a pedal from 1994 to 2000, and M5223AL means 2000 or later.
- The board size. Analog Man notes that DS-1s made in Taiwan from the 1980s to 2016 have a large board, almost the size of the bottom plate, with the power jack attached to it. The oldest Japanese and first-issue Taiwan pedals are different again, enough that Analog Man's mod chips won't fit them.
- Surface-mount parts. In 2017 Boss changed the DS-1 to tiny machine-placed surface-mount parts on a small board, with the power jack moved to the edge. Analog Man adds that the label on these is different too, so the bottom of the pedal often gives it away before you see inside.
The DS-1 uses Boss's buffered switching. The signal passes through input and output buffers even when the effect is off, so a seller calling a stock DS-1 true bypass has it wrong or has a modded pedal.
Special editions you'll see listed
Boss has made several DS-1 variants, and sellers sometimes list them as old pedals. These are the ones to recognize.
- DS-1X (2014). A different pedal built on Boss's Multi-Dimensional Processing. It shares the name and the orange box but none of the old circuit.
- DS-1 BK (2016). A black Guitar Center exclusive with orange lettering, limited to 3,000 units.
- DS-1-4A (2018). The 40th-anniversary pedal, with a black body, gold-capped knobs and a vintage-style silver battery screw. It was sold through 2018, so it's easy to find used. A black DS-1 with gold knobs is this pedal, not an early one.
- DS-1W Waza Craft (2022). A revised analog circuit with two modes. Custom mode adds midrange, input sensitivity and output, and Guitar World says it fixes most of the post-1994 problems. Its Standard mode follows the post-1994 circuit, though, so it isn't a stand-in for a 1980s pedal.
- DS-1-B50A (2023) and DS-1-WH (2024). A metallic orange 50th-anniversary run of 7,000 and a pearl-white retailer exclusive.
Modded pedals
Because the DS-1 is cheap and easy to work on, plenty of used ones have been modified. A mod from a known builder can make a better-sounding pedal, but it isn't a stock vintage one, and a modded pedal should be described that way. Analog Man's own limits are a handy check. Its PRO mod only goes on the Taiwan pedals with the power jack on the board, and it can't mod the 2017 and newer surface-mount pedals at all. A listing that claims one of those mods on a surface-mount DS-1 doesn't add up. Our guide to vintage pedal red flags covers mods and swapped parts in more depth.
Which one to buy
If you want the sound on the late-1980s records, buy a pre-1994 pedal with the TA7136 chip. A Made in Japan one is the collector's pick, and an early Taiwan one with the same chip is the player's pick. If you want a dependable distortion and don't care about the era, any later DS-1 works, and there are so many for sale that you can be choosy about condition. If the fizzy top end of a later pedal bothers you, the Waza DS-1W in Custom mode is the factory fix. And if you're building a Boss drive section, the SD-1 and BD-2 are its usual neighbors, while the OD-1 is the overdrive that came first.
What to check in a listing
- Country on the label. Look at the bottom label in the photos. Japan, Taiwan or Malaysia narrows the era before you ask anything else.
- Board and chip. Ask the seller for a photo with the bottom plate off. The chip marking should match the era the listing claims.
- Surface-mount or through-hole. Check whether the board has tiny surface-mount parts and an edge-mounted jack. If it does, it's a 2017 or later pedal, whatever the listing says.
- Mods. Ask whether any parts have been changed. Extra parts, a swapped chip or a true-bypass switch mean a modified pedal.
- Edition. Compare the color and knobs with the special editions above. Black, gold, white or a metallic finish means a modern limited run.
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