Seymour Duncan SJ5-3B - QUARTER-POUND JAZZ BASS 5 TRESTLE
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Manufacturer Information
Seymour Duncan
https://www.seymourduncan.com
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Algam SAS
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The Quarter-Pound Series: The Jazz Bass That Shifts Up a Gear
Within the Seymour Duncan lineup, the Quarter-Pound family is designed for bassists who appreciate the sonic aesthetic of the Jazz Bass but want more punch and a more "aggressive" sound without switching to an active pickup. The SJ5-3B is the 5-string version dedicated to the bridge position, perfect for beefing up the low end while maintaining clear definition.
Who It's For and What It's For
The Seymour Duncan SJ5-3B is aimed at musicians who find their stock bridge pickup too tame. It excels for pick playing, precise slap, rock and metal riffs, or simply to achieve a modern and punchy bass tone that remains clear on the low B string. Ideal as a replacement on many Jazz Bass 5-style basses (depending on cavity dimensions).
What Changes in the Sound: Attack, Punch, and Presence
Thanks to its 6.35 mm Alnico 5 rods and winding designed for a high output level, this pickup delivers authoritative attack, solid lows, and more present highs. The result: a bridge pickup that retains the "J" grain but with superior impact and responsiveness, very effective when you crank up the volume and need to cut through guitars and drums. The wax potting helps reduce feedback and unwanted noise at high volumes.
Technical specifications
| Electronics | Passive |
| Category | bass microphone |
| Instrument | 5-string bass |
| Magnet | alnico V |
| Winding | simple |
| Number of conductors | 2 |
| Position | bridge |
| Resistance | 16 KILOHM |
| Color | Black |
| Model | SJ5-3B |
| Type | passive bass pickup |
| Format | Jazz Bass |
| Number of strings | 5 |
| Technology | single coil |
| Magnets | Alnico 5 |
| Magnet rod diameter | 6.35 mm |
| Output level | high |
| DC resistance (bridge) | 22.2 kOhms |
| Resonant frequency (bridge) | 5.56 kHz |
| EQ (Bass/Mid/Treble) | 7 / 3 / 6 |
| Cable | 2-conductor shielded |
| Coils | wax potted |
| Finish | black plastic cover |
| Made in | USA |
Questions frequently asked
Is the Seymour Duncan SJ5-3B compatible with a 5-string Jazz Bass?
This model is designed in the Jazz Bass format for a 5-string bass and installs in the bridge position. Compatibility depends, however, on the dimensions of the existing cavity.
What output level does this bridge pickup provide?
With a resistance of 16 kΩ, this passive pickup offers a high output level. The 6.35 mm Alnico 5 magnet poles enhance attack and presence.
Is the SJ5-3B suitable for slap and rock styles?
Its stated EQ of 7/3/6 on bass, mids, and treble favors solid lows and pronounced attack. It is suitable for precise slap, pick playing, as well as rock and metal riffs. The B string maintains good clarity according to the description.
What wiring is used on this 5-string bass pickup?
Connection is made with a 2-conductor shielded cable. The electronics are passive and the winding is single coil type.
Are the coils of the SJ5-3B protected against feedback?
The coils are wax potted, a treatment known to reduce feedback and unwanted noise at high volume.



