Maintenance, Humming sound is present in the audio

DD-8Power Amplifiers

Troubleshooting and Maintenance

A humming sound is present in the audio.

Audible hum, or a discernable low frequency noise is one of the most common problems within audio/video systems. This problem, even when the volume is at a low level, Is usually caused by a common problem known as a “ground loop”. A ground loop occurs when there is a difference in ground voltages between two or more components that are connected electrically.

In most cases, one or more of the following suggestions below will solve the hum problem.

1.If a cable TV connection is present, disconnect the cable for the wall outlet. If this eliminates the humming sound, a ground loop isolation device is required. Contact your dealer or cable provider for assistance.

2.Disconnect components one at a time to isolate the problem. Once the problem is identified, make sure the associated component is properly grounded and connected to the same electrical ground as the DD-8 amplifier.

3.Turn off all components within your system and then disconnect the input cables on the DD-8 amplifier. Turn the amplifier back on. If the hum disappears the fault may be with the input cables that are being used. Make sure the cables are properly shielded or use a cable that has better shielding. Make sure the cable is not running or laying on top of any AC power cords.

4.Ground loop problems may also be caused by poor grounding of the electrical system within your home or may be caused by faulty earth grounds in your home’s electrical system. To isolate the problem, try unplugging components with three prong grounded power cords one at a time to see if one or all are causing the problem. In the past, cold water pipes and other utilities were often used for grounds. These items may not be still valid because of corrosion of the existing pipes and the installation and use of PVC piping. Please check with a licensed electrician for further evaluation.

If all else fails…

1.Contact an authorized Lexicon dealer.

2.Contact Lexicon Customer Technical Support at 888-691-4171.

Maintenance

Routine maintenance should be performed on a periodic basis. Clean the exterior surfaces of the unit with a soft, dry, lint-free cloth. Do not use alcohol, benzene, acetone-based cleaners, or strong commercial cleaners. Do not use a cloth made with steel wool or metal polish. If the unit is exposed to a dusty environment, a low-pressure blower may be used to remove dust from its exterior.

14	Operation Manual

DD-8 specifications

The Lexicon DD-8 is a powerful digital delay processor that has gained recognition among audio engineers and musicians for its versatility and high-quality sound processing capabilities. Renowned for its advanced features and technologies, the DD-8 offers unmatched performance in both studio and live settings.

One of the main features of the Lexicon DD-8 is its ability to deliver studio-quality delays with unprecedented precision. The device is equipped with multiple delay algorithms that cater to various audio applications, including classic analog-style delays, digital delays, and more complex modulation effects. Each algorithm is designed to produce a richness of sound that enhances any audio mix, making it an essential tool for creative sound design.

The DD-8 stands out with its comprehensive user interface. It incorporates a bright, easy-to-read display and intuitive controls, which allow users to navigate through parameters effortlessly. This includes the ability to adjust delay times, feedback settings, and modulation depths in real time. Additionally, the DD-8 features a dual-path design, enabling users to apply different delay settings to two separate channels simultaneously, providing greater flexibility for stereo effects.

In terms of connectivity, the DD-8 excels with its robust input and output options. It supports both analog and digital connections, including S/PDIF and AES/EBU formats, ensuring compatibility with a wide range of audio equipment. This makes it an ideal choice for both professional studios and live performance environments.

One of the standout technologies in the DD-8 is its sophisticated DSP (Digital Signal Processing) engine. This powerful processing unit allows for a high degree of customization and control over the audio signal, enabling users to achieve complex soundscapes. The engine also ensures minimal latency, making it suitable for real-time applications without compromising sound quality.

Furthermore, the Lexicon DD-8 is built with high-quality components that contribute to its reliability and durability. Whether used in a studio or on stage, the unit's rugged construction ensures it can withstand the rigors of frequent transport and use.

In summary, the Lexicon DD-8 is a versatile and powerful digital delay processor that combines advanced sound processing capabilities with an intuitive user interface. Its rich feature set, combined with high-quality sound and dependable performance, makes it a valuable asset for any audio professional seeking to elevate their audio productions. Whether for music production, live sound, or creative sound exploration, the DD-8 remains a top choice in the realm of audio processing technology.