At just 6.6 pounds, this KLŌS Apollo IV Custom is a forward-thinking bass designed for players who demand lightweight comfort, modern tone, and exceptional reliability. Built with a lightweight Paulownia body and KLŌS's renowned carbon fiber neck construction, this instrument offers impressive resonance, outstanding balance, and remarkable stability in any environment. Whether on stage, in the studio, or on the road, the Apollo IV delivers consistent performance with effortless playability.

At the heart of the instrument is a powerful Fishman Fluence electronics system, providing multiple voices and a wide range of professional-grade tones from a single bass. Known for exceptional clarity, low noise, and dynamic response, Fishman Fluence pickups deliver everything from vintage-inspired warmth to modern punch and articulation. Combined with a 24-fret stainless steel neck, the Apollo IV offers outstanding sustain, precision, and versatility for bassists performing across rock, funk, fusion, worship, and contemporary genres.

Body

Material: Paulownia / Maple

Pickups: 2x Fishman Fluence

Preamp: Fishman Fluence Active

Controls: 4 Knobs (Volume (Push/Pull - Active/Passive), Treble, Bass, Pickup Blend)

Bridge: Black Aluminum

Bridge Style: Hardtail

Bridge String Spacing: 19 mm

Body Depth: 40 mm

Body Finish: Gloss Feather

Weight: 6 lbs. 6 oz

Full Length: 44"

Pickguard Material: Carbon Fiber

Body Thickness: 40 mm

Knob Material: Black Aluminum

Pickguard Material: Carbon Fiber

Hardware Finish: Black Matte

Neck

Material: Carbon Fiber

Fretboard Material: Composite Ebony

Neck Color: Black Carbon Fiber Twill

Neck Shape: Slim C + D Blend

Truss Rod: Steel with 4mm Hex Wrench

Scale Length: 34"

Number of Frets: 24

Fret Size: Medium Jumbo

Fret Material: Stainless Steel

Fingerboard Radius: 11”

Nut Width: 42mm

Nut Material: Graphtech

Headstock Shape: 3 + 1

Headstock Angle: 12°

Tuners: KLOS Black Featherlight Pro

Accessories

Toolkit: Capo, Wrenches, Screwdriver

Case: KLOS Gig Bag + Neck Bag

Certificate of Authenticity

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ConditionBrand New (New)
Brand New items are sold by an authorized dealer or original builder and include all original packaging.Learn more
Brand
  • KL0S
Model
  • Apollo IV Custom
Finish
  • Feather
Categories
Year
  • 2026
Made In
  • United States
Number of Strings
  • 4-String

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SoCal Bass & Fx

San Marcos, CA, United States
Joined Reverb:2020

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