POWER SWITCH (Off/AUTO/On) - Complete with light indicator. When switched to “AUTO” mode, the 
PHASE SHIFT - 0 to 180° subwoofer phase shift switch.
VOLUME CONTROL - Manual adjustment of the subwoofer’s sound level. Always start at MIN position and slowly increase the volume to reach the desired subwoofer sound level.
XOVER FILTER - This 12dB/Oct variable crossover filter is designed to control the subwoofer’s cut off frequency (range: 40Hz to 130Hz).
LINE OUT RCA - High pass filtered RCA output jacks with left and right line output signals. The line out RCAs are not functional when the line in signal is derived from a 
LINE IN RCA - Input jacks to accept up to 2.3 Volts of audio input signal (mono and stereo).
HIGH LEVEL OUTPUT - High pass filtered output terminals designed to power up stereo satellite speakers.
MAIN POWER FUSE - Always replace protection fuse with one with similar value. An extra fuse is provided for your convenience.
HIGH LEVEL INPUT - Clamp style input terminal accepts high level audio input from main or front system speakers (up to 10 Volts).CP-8 specifications
The Earthquake Sound CP-8 is a powerful and compact subwoofer designed to deliver deep bass and enhance the overall audio experience, making it a popular choice for home theaters, music enthusiasts, and professional audio setups. With an array of impressive features and advanced technologies, the CP-8 stands out in the realm of compact subwoofers.One of the primary characteristics of the CP-8 is its 8-inch driver, engineered to produce rich and resonant bass frequencies that can fill a room without overwhelming the main speakers. This driver is complemented by a high-efficiency amplifier that powers the unit, ensuring that it can deliver impressive output while maintaining clarity and precision in sound reproduction.
The CP-8 is equipped with a unique opportunity for fine-tuning sound thanks to its adjustable crossover frequency and phase control. This allows users to match the subwoofer seamlessly with other audio components in the setup, providing the versatility needed for various listening environments. Furthermore, the adjustable volume control enables users to set the desired bass levels according to their preferences.
One of the standout technologies employed in the CP-8 is its advanced DSP (Digital Signal Processing). This technology optimizes the audio output, ensuring that distortions are minimized and the overall sound is balanced across a wide range of frequencies. This is especially beneficial in delivering an immersive experience in movies and music, as the subwoofer can reproduce low-end frequencies effectively without losing detail in mid and high ranges.
The CP-8 also incorporates a sleek and compact design, allowing it to fit into tight spaces without compromising on performance. Its sturdy construction ensures durability, while the attractive finish complements any modern audio setup. Additionally, the inclusion of both speaker-level and line-level inputs makes it easy to integrate with a variety of audio systems, making it an accessible option for both casual listeners and audiophiles alike.
In summary, the Earthquake Sound CP-8 is a versatile and powerful subwoofer that combines advanced technologies with user-friendly features. Its robust performance, adjustable settings, and compact design make it an exceptional choice for anyone looking to enhance their audio experience, be it in a home theater, studio, or any listening environment. Whether you're watching your favorite movies or enjoying your music collection, the CP-8 promises to deliver an impactful and enjoyable sound experience.