1B15LH 4Ω — 1×15″ Lite Hybrid

Single 15-Inch Lite Hybrid for the Range-Extended Bassist

The 1B15LH brings the deep low-end character of a 15-inch driver into Form Factor Audio's Lite Hybrid construction — a single 15-inch neodymium-magnet woofer paired with a 1.46-inch annular tweeter, housed in a chassis built from three different types of plywood. Designed and built in California, the 1B15LH represents the lightest 1×15 configuration in the Bass Instinct Series, engineered for upright bassists, range-extended electric players, and orchestral musicians whose schedule demands the most travel-ready single-driver cabinet.

Trusted by touring professionals who require the displacement of a 15-inch driver in a chassis weight optimized for regular travel, the 1B15LH delivers 700 watts RMS (1400W max) at 99 dB sensitivity through a 40 Hz–20 kHz bandwidth — at 38 pounds, in standard Gig Armor™ Textured Black or one of two limited-series corporate finishes.

What it does

A single 15-inch neodymium-magnet woofer paired with a 1.46-inch annular tweeter, in a Light Hybrid Design cabinet combining three different types of plywood. 700 watts RMS handling, 1400 watts maximum. 99 dB sensitivity. 40 Hz–20 kHz response. Selectable 4-ohm or 8-ohm operation.

“For the upright bassist, a 15-inch driver isn't a stylistic choice — it's an engineering requirement. The 1B15LH is engineered to deliver the displacement and low-frequency response a 15 provides, in a Lite Hybrid chassis that brings the carrying weight down to thirty-eight pounds. Three types of plywood — chosen for the specific acoustic behavior of each — work together with the neodymium driver and the 1.46-inch annular tweeter to deliver a cabinet that's both tour-ready and acoustically faithful.” — Mike Lera, Head of Engineering & Design

Build & components

• Light Hybrid Design — three different types of plywood
• Neodymium 15-inch woofer
• 1.46″ annular tweeter
• 18-AWG steel grill (powder coated black)
• Gig Armor™ Textured Black finish (standard touring)
• Limited-series corporate colors: Olive Green · Regatta Blue
• 2 × NL4 Speakon™ inputs
• Two side-mounted handles (1 per side)
• Made in California

In use

The 1B15LH is the cabinet for the upright player whose schedule values portability, the orchestral pit musician working multiple nights a week, and the range-extended electric bassist whose work involves regular travel. Pair with the Bi500 Di Mark III for studio and theater contexts, or with the Bi1000 Di Mark III for amplified upright on larger stages.

Why working bassists choose the 1B15LH

• 40 Hz response — captures the full fundamental of upright and extended-range electric bass
• 38 pounds — the lightest 1×15 in the Bass Instinct Series
• 700W RMS (1400W max) handling, 99 dB sensitivity
• Light Hybrid Design with three plywood types
• 1.46″ annular tweeter for extended high-frequency response
• Standard Gig Armor™ Textured Black, plus limited-series Olive Green / Regatta Blue