LOW Frequency Speaker Systems

Suspension – The suspension of a speaker is the part of the speaker which controls the motion of the cone. This is what changes the electrical energy to sound energy. The surround is constructed from a dual laminated foam which ensures linear motion of the cone while resisting mechanical and environmental damage.

Dual Input Terminals – To facilitate hook-up in multiple driver configurations, each positive and negative terminal has two connect- ing lugs. The positive terminal is identified by a dot which also indicates the speaker's impedance. A red dot is used on a 8Ω speaker, a violet dot on a 4Ω speaker.

The Series 1 Woofers require an enclosure to achieve optimum results. The enclosure allows the speaker to operate at lower frequen- cies with improved power handling. The two most commonly used types of low frequency speaker systems are acoustic suspension and bass reflex. The acoustic suspension enclosure, commonly referred to as a sealed box, relies upon the changing air pressure in a tightly sealed chamber of its operation. The bass reflex, commonly referred to as a ported enclosure, uses a vent inserted into the box which takes over for the speaker at a desired frequency which is determined by the internal volume of the enclosure and the size of the vent used. The Series 1 Woofer will yield optimum performance in a ported enclo- sure.

USING THE SERIES 1 WOOFERS

Speakers are built in different sizes to optimize their performance in different frequency bands. Crossovers are used to route the different frequency bands for each appropriate speaker. There are two opera- tional types of crossover: active and passive. An active crossover is an electronic filter which is placed before the amplifier and separates the signal fed to different amplifiers in the system. A passive crossover is positioned after the amplifier and separates the signal fed to each speaker in the system. Active crossovers offer the accuracy and flexibility needed for a sophisticated system and are used in complex multiple amp designs. Passive crossovers (capacitors and inductors) allow the use of multiple speakers in a simple system which can easily be expanded over time. We recommend using a 6dB per octave, 100Hz low-pass crossover for the Series 1 Woofers when used with a passive system.

To customize the installation, try adjusting the crossover point one octave up or down to optimize the system staging.

S1-415, S1-808, S1-810, S1-812, S1-408 specifications

Rockford Fosgate, a name synonymous with powerful and high-quality audio solutions, has made a significant impact in the world of car audio with their S-Series subwoofers. The S1-412, S1-410, S1-815, S1-408, and S1-812 models are all designed to deliver exceptional sound performance and reliability, catering to both casual listeners and audiophiles alike.

Starting with the S1-412, this subwoofer offers a robust 12-inch design that provides deep bass and impressive power handling. It is equipped with a dual 4-ohm voice coil allowing for flexible wiring configurations. The S1-412 features a high-temperature voice coil that ensures durability during intense use and a rugged injection-molded cone which contributes to its longevity.

The S1-410, another standout, is a versatile 10-inch subwoofer. It boasts a compact design, making it suitable for smaller installations without sacrificing performance. Its heat-resistant materials and reinforced cone design afford increased reliability. With a power rating that matches its larger counterpart, the S1-410 delivers punchy bass and clarity, making it ideal for varied music genres.

On to the S1-815, this 15-inch subwoofer is designed for those who demand maximum bass output. Its larger size allows for deeper frequencies while its advanced cooling technology prevents overheating, drawing out extended playability. The S1-815 is particularly beneficial for those who want to fill larger spaces with booming bass.

The S1-408 model offers another excellent option. This 8-inch subwoofer fits into tight spaces yet maintains the punchy bass response expected from Rockford Fosgate. The advanced suspension system combined with a flexible voice coil design enhances sound accuracy and responsive performance, making it perfect for smaller vehicles or tight enclosures.

Finally, the S1-812 brings together the performance of a 12-inch subwoofer in a well-engineered package. It features innovative cone design and heavy-duty suspension components, allowing it to handle high wattage without distortion. The S1-812 combines versatility with power, making it an attractive choice for a broad range of audio enthusiasts.

All these models share core Rockford Fosgate technologies such as high-temperature voice coils, durable cone materials, and powerful magnet structures, ensuring fidelity and resilience in every bass note. With their precise engineering, the S Series subwoofers are designed to enhance the overall audio experience, providing an unbeatable blend of power, clarity, and style for car audio systems.