Bass Instinct Bi500 Di Mark III

Professional-Grade Bass Power in an Ultra-Light, Studio-Ready Form

The Bi500 Di Mark III is the next evolution of Form Factor Audio’s renowned Bass Instinct series. Designed and built in California, the Mark III generation preserves the signature Form Factor tone—tight, articulate, and mix-ready—while introducing major advancements in power delivery, portability, and overall musical performance.

For working bassists who demand precision, clarity, and reliability in a compact footprint, the Bi500 Di Mark III delivers professional-level performance that fits effortlessly into any gigging or studio workflow.

All of our amplifiers are covered by a comprehensive 2 year warranty. 

Clean, Stable Power with Zero Low-End Collapse

Powered by the same Dynamic Power Supply (DPS) platform featured in the flagship Bi1000, the Bi500 Di Mark III maintains full stability and articulation across the entire bass frequency range.

The enhanced capacitor reserve ensures that even at high volumes and with extended low-frequency content, the amplifier remains clean, responsive, and uncompressed. This is the kind of low-end integrity most lightweight amps cannot match.

Power Rating:

• 500W RMS @ 4Ω

• 250W RMS @ 8Ω

Perfect for studio sessions, club stages, rehearsals, and fly dates.

Refined Limiter for Natural, Dynamic Feel

The updated limiter circuit offers improved sensitivity and smoother interaction, allowing players to dig in and play expressively without unnatural compression artifacts. It retains the musical nuance of your technique while protecting the amplifier during demanding performance conditions.

Ready for Any Gig, Anywhere

With a 100–240 VAC auto-switching universal power supply, the Bi500 Di Mark III is designed for seamless international touring. Plug in anywhere in the world—no converters, no concerns.

Its consistent output and low noise floor make it equally suited for live backline, studio DI recording, remote sessions, and modern content creation workflows.

Precision Tone Controls for Any Style or Stage

The Bi500 Di Mark III features a full four-band tone stack with a sweepable midrange, offering exceptional control over your sound in any environment.

Controls:

• Gain

• Limiter

• Master

• Mute

• Bass

• Mid

• Mid Frequency Selector

• Treble

This layout gives you the flexibility to sculpt modern punch, vintage warmth, or studio-clean articulation with ease.

Ultra-Portable, Rugged, and Built for Work

Weighing just 4.1 lbs (1.9 kg) and housed in a powder-coated aluminum chassis, the Bi500 Di Mark III is engineered for maximum portability without compromising durability.

Its compact footprint of 2.9" × 11.8" × 9.1" allows it to fit into any gig bag side pocket or carry-on case, making it ideal for players who travel frequently or require a minimalist but powerful rig.

Professional Connectivity for Real-World Use

Every connector is high-grade Neutrik for optimal longevity and high-fidelity signal integrity.

• 2 × NL4 Speakon™ outputs

• 1 × Powercon™ power input

• 6 × Neutrik ¼" connectors

• 2 × balanced XLR outputs

The DI output is quiet, clear, and engineered for live and studio environments, providing a consistent tone that front-of-house engineers rely on.

Why Bassists Choose the Bi500 Di Mark III

• Lightweight and highly portable at just 4.1 lbs

• Clean, articulate tone with no power sag

• Universal power supply for worldwide operation

• Refined limiter for smooth dynamic performance

• Studio-quality DI for recording and live sound

• Rugged aluminum chassis for long-term reliability

• Built in California to the highest specifications

Compact Size. Serious Power. Signature Tone.

The Bi500 Di Mark III delivers premium Form Factor sound and performance in an exceptionally lightweight package. For players who want world-class tone, professional reliability, and effortless portability, this amplifier is the perfect balance of power and precision.

Experience the next generation of bass amplification with the Bi500 Di Mark III.

Add to Cart and elevate your sound today.

Bi500Di MkIII SPECIFICATION