Troubleshooting and Service

Before seeking service for your subwoofer, please re-check all systems. Following is a simple troubleshooting guide to assist you.

1.Verify unit is plugged in and power outlet used is active.

2.Is power switch on?

3.Is auto turn on/off set properly?

4.Is unit receiving an input signal from your source?

5.Have all controls on subwoofer (volume, crossover, phase, etc.) been properly set?

6.If unit has been running at high levels, one of the protection circuits may be engaged.

7.Has the built-in amplifier overheated?

If the protection circuitry is active, the unit may cycle on and off until operating parameters return to normal. Under more serious conditions, the unit may shut off completely. Normal operation will return upon cooling, but you may be required to turn the power off and then on again to reset the unit.

The following conditions require service by a qualified technician:

1.The power cord has become damaged.

2.The unit does not appear to operate normally or exhibits a marked change in performance.

3.The unit has been exposed to water.

4.Some part of the cabinet or circuitry is physically damaged.

Thank you for purchasing a

Velodyne DLS Subwoofer!

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Congratulations!

Congratulations on your purchase of a Velodyne DLS subwoofer system. This system represents the state of the art in low frequency reproduction. Your new subwoofer features Velodyne's exclusive DLS (Distortion Limit- ing System) technology that significantly improves the subwoofer's perfor- mance by limiting audible amplifier distortion and controlling the driver excursion. The result is a subwoofer that reproduces music and home- theater with a fraction of the audible distortion found in lesser products. This exclusive DLS technology increases the detail and definition of your subwoofer without sacrificing output or dynamic impact.

Read and follow the instructions below to insure safe and proper system operation.

Warning!

To prevent fire or shock hazard, do not expose this equipment to rain or moisture. To avoid electrical shock, do not open speaker enclosure or amp chassis cover. Please observe all warnings on the equipment itself. There are no user serviceable parts inside. Please refer all service questions to your authorized Velodyne dealer.

Prior to installation

Please unpack the system carefully. Remove all staples used to seal the carton as they can scratch the cabinet. Please save the carton and all packaging materials for future use. Record the serial number in the space provided on the warranty card or log onto www.velodyne.com.

Product Features and Controls

Built-in 160 watt (RMS) power amplifier (DLS-3500)

Built-in 175 watt (RMS) power amplifier (DLS-3750)

Built-in 200 watt (RMS) power amplifier (DLS-4000)

Distortion Limiting System (DLS) - limits amplifier distortion and controls driver excursion

Subwoofer Direct - switchable crossover bypass

Adjustable (40 to 120Hz) low-pass crossover

Selectable (80 or 100Hz) high-pass crossover (DLS-4000)

85 Hz high-pass crossover (DLS-3500/DLS-3750)

continued. . .

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Velodyne Acoustics DLS-3750, DLS-4000, DLS-3500 Troubleshooting and Service, Congratulations, Product Features and Controls

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.