Designed specifically for sealed enclosures, this 12-inch all-weather woven fiberglass cone subwoofer combines high sensitivity and high power handling. With a Nitrile Butadine Rubber (NBR) surround for durability, the Focal standard woven glass fiber cone for dynamic bass, high-sensitivity magnet with rubber cap to protect against shocks and corrosion, these subs are an ideal solution for your low-end needs. Experience Focal"s "Spirit of Sound" with flawless imaging, and uncommon detail and dynamics. About the Access Line Discover the world of Focal sound quality via a range that reconciles technology, performance and affordability. The same Focal character and our philosophy of "The Spirit of Sound" is displayed by the extreme attention to detail found at every development stage for the various transducers and crossovers. The essential component in terms of quality of reproduction, richness of timbre plus image detail is the inverted dome aluminum tweeter whose inclusion represented a true challenge: how to bring a unique Focal technology into a more affordable market segment. At the same time, the woofers and subwoofers combine high sensitivity and high power handling. The humidity resistant woven glass fibre cone combines the dynamics and precision of the mid-range while offering a deep and articulated bass. 12-inch all-weather woven fiberglass cone subwoofer provides high sensitivity and high power handling. Click to enlarge. Focal"s All weather woven glass fiber cone material ensures dynamic bass. 30 A1 DB Features NBR Surround Nitrile Butadine Rubber is an ultra-resilient material, allowing maximum cone movement and ensuring a long life. All weather woven gloss fiber cone Focal"s durable, humidity-resistant cone material provides dynamic bass and precise midrange. Gasket supplied No air leak and better chassis damping for tight, defined bass. Spider support Provides more excursion for even more bass. 145mm (5-11/16") magnet High sensitivity where everything begins. Rubber magnet cap A durable rubber shielding protects the subwoofer"s magnet from shocks and corrosion. 65mm (2-9/16") dual voice coil, 4 layer A large, four-layer voice coil means higher power handling. 2x4 Ohm dual voice coil A dual voice coil provides connection adaptability to an amplifier, so you can get the most out of your amp. Voice coil cooling system Keeping the voice coil cool means no dynamic compression and optimized reliability, for all-around performance. Zamak chassis Rigid, non magnetic, non resonant chassis. 30 A1 DB Technical Specifications Frequency response: 25 - 500 Hz Nominal power: 250 W Maximum power: 500W Sensitivity: 91 dB Cone: Braided glass fiber Surround: Butyl Nom. impedance: 2 x 4 ohms DC resistance: 1.69 ohms VC diameter: 65mm (2-9/16 inch) VC height: 18 mm (11/16 inch) Former: Kapton Layers: 4 Wire: Copper Inductance: .68 mH Magnet Dimensions (D x H): 145 x 20mm (5-11/16 x 13/16 inches) Magnet weight: 1.15 kg (2.15 lb.) Flux density : 0.8 T Gap height: 8 mm (5/16 inch) Net weight: 4.8 kg (10.58 lb.) About Focal Innovation is key to the Focal sound. For 25 years, through the pursuit of constant new advances in technology, Focal has been able to develop a harmonious research and production system that enables us to continuously improve our products and introduce new ones, all with the same goal: the most faithful reproduction of music. The latest example of this philosophy has been the introduction of Beryllium in our top products, which has become a new reference worldwide. Constantly pursuing innovation is the embodiment of Focal"s corporate strategy and that goal involves every facet of the company. From R&D to production to quality control, all our teams are fully involved and focused on this one objective: continual progress through innovation. In today"s world, where globalization and the pursuit of chasing cheaper production methods have tempted most companies to splinter their organizations, Focal has opted to be different. Though we have grown tremendously through the years, our R & D, headquarters and manufacturing facilities remain based in Saint-Etienne (France). We have learned that true innovation is not simply work carried out at the research department, but is also a question of comprehensive management and the direct control of the different production phases. The example of Beryllium is a significant one. Only three years ago no one was capable of producing tweeters with a pure Beryllium foil dome. Focal innovated a solution based on research and the invention of specific in-house industrial processes. Such an approach has given us an important advantage over our competitors: we develop our own technology, which allows us to consistently provide true quality production using our own methods. In 2008, the Focal Car range gets richer with a new amplifier line: Solid. This perfectly sums up Focal"s commitment for high musical quality from the entry-level contrary to the general tendency that consists in looking for the cheapest prices in priority instead of performance.The result is music standardization and trivialization, which is highly prejudicial to sound quality. Focal cultivates this difference. This is the core strength of our brand and our company. This is the Spirit of Sound. We want to share this with you... It is our Utopia What"s in the Box 30 A1 DB Subwoofer, Installation Hardware, User Manual Other Focal Subwoofer Solutions Focal Access 25 A1 11-Inch Subwoofer Focal Access 30 A1 13-Inch Subwoofer Focal Access SB 25 A1 Vented Enclosure Focal Access SB 30 A1 Vented Enclosure