Fender Jaco Pastorius Signature Fretless: Beautiful But Too Perfect

I had the Fender Jaco Pastorius signature fretless bass in my hands. And my first thought was: this is beautiful. My second thought was: it’s too perfect.

Jaco Pastorius had one bass. A 1962 Fender Jazz Bass that he modified himself — pulled out the frets with a butter knife, filled the slots with epoxy, painted the whole thing. Over the years that bass got beaten up, dinged, worn down in all the ways that happen to an instrument that’s played every single night. That damage became part of the identity. The “bass of doom” is iconic partly BECAUSE it looks like it’s been through a war.

Fender makes two versions of the signature model. The standard Jaco Pastorius Jazz Bass, which is what I had access to. And the Custom Shop Relic version, which is painstakingly aged and distressed to look like the original — right down to the worn finish, the scratches, the checking on the lacquer.

The standard version is a fine instrument. Fretless rosewood board, epoxy finish, custom ’60s pickups. It plays well and it sounds like a Jaco bass should. But it looks brand new. It’s pristine. And when you pick it up knowing what the original instrument looked like, there’s this disconnect. This bass should look like it’s been somewhere. It should have stories on it.

Because I only had it for a short time and couldn’t do a proper long-term evaluation, I kept it to a couple of shorts rather than a full review. Here’s the second one with flatwound strings:

With flatwound strings the character of the bass changes completely. The top end softens, the attack rounds off, and you get this warm, vocal midrange that’s closer to the classic Jaco sound than you’d expect from a modern production instrument. Honestly, if you’re going for the Jaco tone specifically, flatwounds on the standard model might get you most of the way there.

Would I buy one? If I had to choose between the standard and the Relic, I’d go straight for the Custom Shop Relic. The price difference is significant but so is the experience. The standard is a good bass. The Relic is an instrument that makes you feel something every time you pick it up.

The Jaco Pastorius signature fretless bass is Fender’s attempt to document a specific instrument in history. Jaco’s original 1962 Jazz Bass — the one he defretted himself with a butter knife and wood filler, reportedly — was a unique object. Every player who has tried to replicate his tone has had to wrestle with the same question: how much of that sound was the bass and how much was him?

The honest answer is: mostly him. Jaco’s tone came from his right hand as much as anything. The way he would pull the string and let it smack the neck slightly, the combination of that attack with the sustain of the fretless board — that’s technique, not equipment. But the signature model gets you closer to the starting point than a standard Jazz Bass would.

Fretless bass is a fundamentally different instrument than fretted. Intonation is entirely your responsibility. There are no training wheels. Every note requires active listening and micro-adjustment, which means fretless playing is also the best ear training you can do on the instrument.

If you’ve never played fretless before: start with lines you know extremely well on fretted bass. The muscle memory of the interval relationships will give you reference points. Don’t start with new material — you’ll be lost.

The mwah tone — that singing, vocal quality that Jaco made famous — requires low action, round-wound strings, and a right-hand position close to the bridge. It’s setup-dependent as much as technique-dependent. Get the setup right first before you blame your hands.

One of the most common mistakes players make when approaching fretless for the first time is playing too many notes. The instrument rewards restraint. Every sustained note on fretless has a vocal quality that gets obscured if you’re running through fast passages constantly. Slow down, let the instrument breathe, and discover what happens to a well-placed note when it’s allowed to sustain fully. That discovery is why players who get serious about fretless often stay on fretless.

Intonation on fretless improves through listening, not through mechanical practice. Record yourself playing sustained notes against a drone. Listen to the relationship between your note and the drone. Adjust until it locks. Do this every day for a month and your ear will develop faster than almost any other practice method.

The Jaco Pastorius signature is not just a product. It’s a document of what one specific player made possible. Jaco changed the perceived role of the bass in a band context. He proved that the instrument could carry melody, harmony, and rhythm simultaneously without sacrificing any of them. Every bassist working today has been influenced by that, whether they know it or not.