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Description
The Crossover Bass by Zeta
The Zeta Crossover Bass is best classified as a discontinued / vintage electric upright bass, commonly found only on used marketplaces like Reverb and occasionally eBay. Originally developed in the U.S. (with early versions tied to Gibson-era production), it blends the feel of an upright bass with the playability and scale of an electric bass. The slim solid-body “crossover” design allows it to be played both upright and like a strapped instrument, making it especially appealing for doubling bassists. It features an active preamp with tone controls and piezo-based pickup system for a clear, articulate sound suited to jazz, fusion, and modern styles. Its lightweight body and adjustable endpin system simulate upright ergonomics while remaining portable. Today, it’s considered a niche but respected instrument among electric upright bass players due to its unique hybrid design and relative rarity.
Specs:
• Type: Electric Upright / Hybrid “Crossover” Bass
• Scale Length: Approx. 34" (electric bass scale)
• Strings: 4-string (rare 5-string variants exist)
• Body: Slim solid-body, lightweight design
• Neck: Maple (typical), upright-style fingerboard radius
• Pickups: Piezo bridge system with individual elements
• Electronics: Active preamp with EQ (bass/treble controls)
• Hardware: Adjustable telescoping endpin + body support system
• Playing Modes: Upright position or strapped (electric-style)
• Origin: USA (early production linked to Gibson custom shop)
• Use Case: Jazz, fusion, studio work, silent practice, doubling bassists
Videos
The RFMFR Channel w/ RaJuR
The Zeta Crossover EUB Bass w/ Synth Access!!
The Zeta Crossover EUB Bass w/ Synth Access!!
The RFMFR Channel w/ RaJuR
Reviews
4.0 out of 5
Based on 1 Review and 1 Rating
113
Very Versatile Bass
This bass works out perfectly for a band I'm in now. I've used it both strapped on like a regular electric bass and on it's endpin as an upright. It's a 34" scale length so keep that in mind. It make it perfect for transitioning between electric and upright. The bass is made to a super high standard. The quality and workmanship are amazing.
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