Focal Inside ISUB Active 2.1 Amplifier

Upgrade your factory sound system with the Focal ISUB ACTIVE 2.1, a compact yet powerful amplified subwoofer designed to deliver deep, punchy bass while also boosting your front speakers with an integrated 2-channel amplifier. This 2-in-1 solution ensures a genuine audio enhancement for any OEM system.

Equipped with an 8-inch ferrite-driven subwoofer inside a bass-reflex enclosure, it produces powerful and dynamic low frequencies (up to 260W). The integrated amplifier also provides 130W RMS output with high-pass and low-pass crossovers, adjustable between 20–180 Hz, allowing you to fine-tune your system for optimal performance.

Thanks to its Plug & Play ISO cable, the ISUB ACTIVE 2.1 installs seamlessly into most vehicles without modifications. Its slim, ultra-compact design (just 63mm high) makes it easy to integrate under seats or in tight spaces, all while preserving trunk capacity. Built with Focal’s renowned audio engineering, it combines robust construction, premium sound quality, and ease of use.

Key Features

• 2-in-1 solution – amplified subwoofer + 2-channel amplifier (2.1 system)
• 260W peak / 130W RMS for deep, powerful bass
• 8-inch bass-reflex subwoofer with ferrite motor
• Amplifies front channels – enhances factory speakers with added clarity
• Plug & Play ISO cable included – quick, hassle-free installation
• Compact design – fits under seats or in tight spaces without losing storage
• Customizable tuning – adjustable input gain, crossover settings, and bass boost
• Built with Focal’s expertise – durable, reliable, and performance-driven

Technologies

• Focal Bass-Reflex Design – Produces deep, accurate bass.
• Integrated 2-Channel Amplifier – Powers both the subwoofer and front speakers.
• Plug & Play Integration – Connects directly to OEM systems without modifications.
• Compact Form Factor – Slim profile allows discreet, space-saving installation.