You should set the crossover frequency to obtain a smooth and seamless transition from the subwoofer(s) to the main speakers in your system. If your main speakers are smaller units with limited low frequency output, you may wish to choose a higher frequency (such as 100-120 Hz) than you would with larger speakers which have greater low frequency output. With larger speakers, you might start with this control set lower, such as 80 Hz. The SC-1250 crossover has a default of 80 Hz.

Most receivers and processors provide an option to characterize main speakers as “large” or “small.” This affects the crossover point. We recommend in most cases setting the main speakers to “small,” despite their size and frequency response characteristics. This is because the powerful 1250 watt SC-1250 combined with the SC subwoofer(s) you have acquired are more than likely more suited to low bass reproduction than your amp and main speaker combination. With the burden of low frequency reproduction relieved, your amplifier and main speaker combination will enjoy better performance and about 50% more available headroom, enabling them to more accurately reproduce the rest of the frequency spectrum.

Disabling the Low - Pass Cr ossover (Subwoofer Dir ect)

If your receiver/processor provides a crossover to the subwoofer(s), you may want to bypass the SC-1250’s low-pass crossover. To do this, depress BOTH--the Crossover UP and Crossover

DOWN buttons simultaneously. The numeric LED will show indicating that the low-pass crossover has been defeated. To reactivate the low-pass crossover, simply push the crossover UP or crossover DOWN buttons.

AWor d About Your Receiver’s Cr ossover and the SC - 1250 Cr ossover

Your Velodyne SC-1250 amplifier is designed to operate using the full range audio signal for input when using the built-in crossover. Many home theater processors/receivers (Dolby Digital®, DTS®, THX™) have a “subwoofer out” jack that performs this same function and are designed to be used with a powered subwoofer.

In these installations, you may want to bypass the crossover in either the processor or the Velodyne SC-1250 as described above. However, in some cases you may want to use BOTH crossovers. If you choose to do this you should stagger the frequencies, (i.e., 120 Hz subwoofer, 80 Hz processor) for best results.

Note: If not using an external crossover, you should use the built-in crossover for optimal performance. When using a single RCA sub out from the processor, it does not matter which line level input (L/R) is used.

A Wor d About Inter connect Cables

When installing your Velodyne SC-1250 using the line-level connections, you should always use high quality shielded interconnect cables. It is recommended that you keep the length of cable as short as possible to avoid any potential external interference problems.

When connecting the SC-1250 to your subwoofer(s), use a quality speaker cable that is at least 14-gauge. Be very careful to avoid any loose or frayed strands that could result in a short, causing a dangerous condition and possible damage to your unit. Cables of extremely large size are typically not required. Extremely large gauge wire may not properly fit in the binding posts, resulting in a poor connection and possible short circuits.

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Velodyne Acoustics SC-IW, SC-IF, SC-8 Disabling the Low Pass Cr ossover Subwoofer Dir ect, Wor d About Inter connect Cables
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SC-15, SC-IF, SC-12, SC-IC Subwoofers, SC-1250 Amplifier specifications

Velodyne Acoustics has long been a leader in high-performance audio products, and their SC-IW model continues this tradition by delivering an exceptional listening experience through innovative technology and superior craftsmanship. The SC-IW, short for "Subwoofer In-Wall," is engineered to provide deep, powerful bass while seamlessly integrating into any home or commercial environment.

One of the standout features of the SC-IW is its unique design, which allows the subwoofer to be installed directly into the wall. This in-wall configuration not only saves valuable floor space but also helps to minimize clutter in a room, creating a cleaner and more aesthetically pleasing environment. The subwoofer's robust construction ensures durability while also providing excellent acoustic performance.

The SC-IW utilizes Velodyne's proprietary technology to deliver impressive sound quality. Its high-excursion driver provides enhanced bass response and ensures that low frequencies remain clear and punchy. Additionally, the subwoofer features a powerful built-in amplifier that delivers up to 300 watts of peak power, allowing it to produce room-filling sound without distortion, even at high volumes.

Another notable characteristic of the SC-IW is its user-friendly controls, which allow for easy adjustments to suit the acoustics of the room. The included adjustable low-pass filter lets users set the optimal frequency range for the subwoofer, ensuring that it blends seamlessly with existing speakers. Furthermore, the subwoofer has a variable phase control, allowing it to be fine-tuned to eliminate any phase cancellation and deliver cohesive sound.

The SC-IW also comes equipped with advanced connectivity options, making it compatible with a variety of audio systems. It features both line-level and speaker-level inputs, catering to different installation requirements and preferences. This flexibility ensures that the SC-IW can be easily integrated into any setup, whether it be a home theater or a multi-room audio system.

In conclusion, the Velodyne Acoustics SC-IW subwoofer combines cutting-edge technology, elegant design, and superior performance to redefine how audio is experienced in any setting. With its in-wall installation capability, robust construction, powerful amplification, and user-friendly features, the SC-IW is an ideal choice for audiophiles seeking uncompromising sound quality and aesthetic harmony in their listening environment.
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