Form Factor 1B15L

A Lightweight 15″ Cabinet with Massive Low End, Fast Response, and Full-Range Clarity

The Form Factor 1B15L is the lightweight neodymium counterpart to our flagship 1B15 ceramic cabinet—delivering the same deep, musical low end with a dramatic reduction in weight. Built with next-generation neo driver technology and Italian Lite Ply construction, the 1B15L combines warmth, punch, and precision with true portability.

At only 42.5 lbs (19 kg), this cabinet is ideal for modern bassists who need powerful full-range performance without the burden of heavy enclosures. Whether used alone or paired with the 2B10L (one of our most popular and best-sounding combinations), the 1B15L delivers the unmistakable Form Factor tone with enhanced speed, clarity, and projection.

600 Watts of Lightweight Power and Punch

The 1B15L features a premium 15″ neodymium transducer engineered for fast transient response, defined lows, and a smooth, articulate midrange. While neo drivers typically emphasize efficiency and clarity, the 1B15L maintains the warm, full-bodied character players expect from a world-class 15—just with added speed and detail.

Supporting the woofer is a 1.4″ compression driver with a 90×60 horn, providing smooth, musical highs that integrate seamlessly with the cabinet’s voice. A side-mounted attenuator knob lets you tailor the tweeter’s output to the room, your rig, or your playing style.

This refined crossover design ensures the cabinet performs equally well across all genres, techniques, and dynamic levels.

Ultra-Light Italian Lite Ply Construction

The weight reduction comes from the cabinet’s premium Italian Lite Ply construction—engineered for maximum rigidity with minimum mass. CNC-milled and hand-assembled in California, the cabinet features:

• Precision-jointed, CNC-cut panels

• Extensive cross-bracing for resonance control

• Dual-component polyurethane finish

• Powder-coated 18 AWG steel grill

• Side handles for balanced transport

This is professional, tour-ready construction with modern materials that reduce weight while enhancing acoustic performance.

A Standalone Workhorse or the Perfect Modular Pairing

The 1B15L stands confidently on its own, delivering big low-end authority with outstanding clarity and presence. Paired with the 2B10L, it becomes a truly elite full-range rig—deep, dynamic, and capable of filling any stage.

Whether you’re a working bassist, studio player, or weekend warrior, the 1B15L offers a level of tone and portability that makes it effortless to bring your best sound to any gig.

Video Demo

Specifications

Model: 1B15L
Configuration: 1×15" Neo Woofer | 1×1.4" Compression Driver
Frequency Response: 32–18,000 Hz
Sensitivity: 98 dB
Power Handling: 600W RMS
Nominal Impedance: 8Ω (4Ω available as special order)
Connectors: 2 × NL4 Speakon™
Finish: Gig Armor™ Textured Black
Hardware: 18 AWG Powder-Coated Steel Grill
Handles: 2 (one per side)
Materials: Calibrated Italian Light Plywood
Dimensions:

• 591 × 545 × 400 mm

• 21.2 × 19.8 × 11.8 in
  Weight: 42.5 lbs / 19 kg
  Made In: California, USA

Please note: The 4Ω version is a special-order configuration requiring up to 2 weeks to manufacture before shipping.

Big Tone. Light Weight. No Compromise.

The Form Factor 1B15L is the perfect choice for bassists seeking wide-range articulation, warm low-frequency performance, and effortless transport. It delivers the depth and authority of a 15 with the clarity and nuance of a high-end studio monitor—crafted with pride in the USA.

Experience the next generation of lightweight 15" performance.
Add the 1B15L to your rig today.