Interconnect Cables

Caution!!!

To avoid damage to your main amplifier, be sure to maintain correct polarity when making all connections. The correct method is to connect red (positive) to red and black (negative) to black. Be sure that all connections are tight, and that there are no loose strands or frayed wires.

Figure 2: Installation using SPEAKER LEVEL INPUTS (from amplifier)

INTEGRATED

AMP / RECEIVER

MAIN OUTPUTS (speaker-level)

SATELLITE SPEAKERS

When installing your new DLS subwoofer using the line-level connections, you should always use shielded phono cables. There are many decent cables available today, most any of which will work perfectly well. We do recommend that you keep the length of cable as short as possible to avoid any potential noise problems.

When using speaker level connections, use a decent quality speaker cable that mates well with the connectors. Be very careful to avoid any loose strands or frayed wires which may result in a short, which may damage your equipment. 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.

main speakers are smaller units with limited low frequency output, you may wish to choose a higher frequency (such as 100-120Hz) 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 80Hz.

Subwoofer Direct

A bypass switch is also provided if you wish to use an external crossover. If you are not using an external crossover, we recommend that you use the one provided within the unit for optimum performance.

Phase adjustment- 0°/180°

This control allows you the "reverse" the phase of the subwoofer's output signal 180° to correct for any possible mismatch and resulting cancellation between the subwoofer and your main speakers/amplifier. To adjust, simply listen to the system with music playing. Then move the switch from one position to the other and listen for a change in low frequency output. The correct position will have a greater amount of apparent low frequency output.

Auto turn on function

With this function in the "auto" position, your subwoofer can be safely left with the main power switch on continuously. The subwoofer will turn itself on automatically when an audio signal is present. If no signal is present for approximately 10 minutes, the unit will switch to standby mode. While in standby mode, your subwoofer will draw very minimal power. Leaving the switch in the "on" position can disable this function.

High pass crossover switch

This switch selects the frequency for the high pass crossover. This crossover is functional on both line and speaker-level outputs. Smaller speakers with limited low frequency output may prefer the higher 100Hz setting which will reduce the low frequencies sent to them. Larger speakers with greater low frequency output may be able to handle the 80Hz setting without strain.

Power switch

The master power switch is located on the right half of the unit. This rocker style switch is the main on/off for the unit. This switch should be set to position 1 for on (up), 0 for off (down).

continued. . .

7	☞	4	☞

DLS-3500, DLS-4000, DLS-3750 specifications

Velodyne Acoustics, renowned for its commitment to high-performance audio solutions, has developed a lineup of sophisticated subwoofers that stand out for their exceptional sound quality and innovative technologies. Among these models are the DLS-3750, DLS-4000, and DLS-3500, each designed to cater to different listening preferences while maintaining the brand’s hallmark of excellence.

The DLS-3750 is engineered for those who desire robust bass in a compact package. This model features a 12-inch driver combined with a built-in amplifier that delivers an impressive 375 watts of continuous power and peaks up to 750 watts. One of the standout technologies in the DLS-3750 is its digital signal processing, which ensures precise control over the frequencies and optimizes performance to minimize distortion. The adjustable crossover and phase control further allow users to tailor the output to best suit their specific acoustical environment.

Moving up the lineup, the DLS-4000 provides an even more powerful option with a 12-inch driver and a peak power output that reaches 1000 watts. The DLS-4000 integrates the same advanced DSP technology as the 3750 but enhances it with an upgraded enclosure design that improves resonance control. This results in a richer bass experience with greater depth and clarity, making it ideal for both home theater enthusiasts and audiophiles who demand high fidelity in their sound reproduction. Its user-friendly interface allows for seamless integration with existing audio systems.

Lastly, the DLS-3500, with its 10-inch driver, is tailored for listeners who may have space constraints but still desire quality high-performance bass. Despite its smaller footprint, the DLS-3500 doesn’t compromise on power, delivering a peak performance of up to 700 watts. It features adjustable tuning options to help achieve an optimal sound tailored to the specific acoustic characteristics of any room. The DLS-3500 also utilizes advanced driver materials that deliver more accurate sound reproduction throughout the low-frequency range.

In summary, the Velodyne Acoustics DLS subwoofer series exemplifies cutting-edge design and engineering. With their powerful amplification, innovative DSP technology, and customizable sound features, the DLS-3750, DLS-4000, and DLS-3500 provide compelling options for consumers seeking to elevate their audio experience. Each model, while differing in specifications, shares the core values of performance and reliability that Velodyne is known for, making them exceptional choices for a variety of audio enthusiasts.