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Washburn AB-20 Acoustic/Electric Bass

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Page last updated Jun 09, 2026

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Description

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The Washburn AB-20 Acoustic/Electric Bass is a versatile instrument designed for bassists who seek the rich tonal qualities of an acoustic with the modern convenience of electric amplification. With its Fishman pickup system, the AB-20 offers exceptional clarity and projection whether you're playing unplugged or plugged in. Crafted with a spruce top and mahogany back and sides, this bass delivers a warm, resonant sound that suits a variety of musical styles. The slim neck profile ensures comfortable playability, making it an excellent choice for both beginners and seasoned players.

Aesthetically, the AB-20 combines classic acoustic design with contemporary features, including a cutaway body for easy access to higher frets. The die-cast tuners provide reliable tuning stability, while the rosewood fingerboard enhances the instrument's overall tonal depth. Whether you're jamming in a studio session or performing live on stage, the Washburn AB-20 is a reliable partner that blends tradition with technology.

Key Features:

Acoustic/Electric bass with Fishman pickup system
Spruce top with mahogany back and sides
Cutaway design for easy access to upper frets
Slim neck profile for comfortable playability
Rosewood fingerboard for enhanced tonal quality
Die-cast tuners for stable tuning

Reviews

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Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Washburn AB-20 Acoustic/Electric Bass.

Features and functionality

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The Washburn AB-20's active electronics include a 3 to 5-band EQ, providing versatile tone shaping for different playing situations.
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User experience

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Owners note the Washburn AB-20's full-sized acoustic guitar body paired with a long neck can be cumbersome and physically demanding to play for extended periods.
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Owners of the Washburn AB-20 mention that replacing the strings with flatwounds improved the overall sound quality when played acoustically and through an amp.
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Other

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Acoustic basses, including the Washburn AB-20, are noted for their bright and snappy tone, which is essential for acoustic projection but may not suit all musical styles.
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Comparisons

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While the Washburn AB-20 excels when amplified, some users suggest considering half-hollow models like the Ibanez AGB for a more traditional bass guitar feel.
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The Washburn AB-20 was acquired for $300 used, offering more value for money compared to similar models, especially after modifying with flatwound strings.
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Mods and upgrades

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Swapping out the bronze strings for flatwound strings on the Washburn AB-20 results in a quieter but preferred tone for some users, both unplugged and amplified.
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Use cases and applications

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One user found the Washburn AB-20 works well for personal practice and casual playing, particularly when using flatwound strings for a softer tone.
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Jeff Ament

Bassist

Pearl Jam

Verified via YouTube

Jeff can be seen using the Washburn AB 20 in smoke grey during the song "Alive", MTV unplugged in 1992. at 4:39 the body is pretty clarely visable. it has the lines and not the soundhole and at 0:46 you can see the washburn headstock.

https://www.vendio.com/stores/MidnightRecords/item/guitar-acoustic-electric/washburn-4-string-bass-guitar-/lid=21976480

Miguel Ángel Huidobro Preciado

Bassist, Rapper

Molotov

Verified via Photo

During the Unplugged performance by Molotov, Miguel Ángel Huidobro Preciado was seen using the Washburn AB-20 Acoustic/Electric Bass, as evidenced by the provided image.