DD-8Power Amplifiers

Basic Operation

3. Local Inputs

Provides a line-level RCA connector input to feed a corresponding speaker-level output channel.

When the DD-8 is used as a multi-zone amplifier, each channel can be provided with a dedicated input signal. The signals from this input will only be available on the corresponding speaker-level output.

Local inputs are grouped and identified in pairs with the labels A, B, C and D and channel numbers 1-8 on the rear panel of the DD-8. These labels can be utilized to easily identify corresponding controls and connections for selecting desired output configurations.

4. Output Level Controls

Provides speaker-level attenuation for each output channel.

The output level controls function as attenuators for each channel and can be used to level-match speakers in an installation. The center detent is the default position that will be appropriate for most speakers with +13dB or -76dB of adjustment from default available as needed. These controls are labeled in pairs A, B, C and D and with channel numbers 1-8 to easily identify which speaker-level output is being adjusted.

5. Stereo/Mono Selection

Selects between Stereo and Mono output configuration for each group of speaker output pairs.

When using the DD-8 in standard stereo operation, select the Stereo position. In this mode, the Left and Right stereo input signals remain intact and are output at the corresponding left and right speaker connection. The DD-8 provides connectivity for four stereo pair of loudspeakers (A, B, C and D) when configured in Stereo mode.

It is possible to combine a stereo bus or local input signal onto two single output channels by selecting the Mono position for that channel pair. This mode is useful for instances where two normally stereo speakers are located far apart and it is desirable to send a combined left and right channel signal to both speakers simultaneously in order to maintain optimal fidelity.

If desired, the DD-8 can be utilized in all mono operation. In this mode, all eight channels can be used independently with either a single mono bus input signal or eight independent mono local input signals. As notated in the bus and local input descriptions, using only one input connector will attenuate the gain by 6dB. A “Y-adaptor” RCA cable can be used at the input to maintain full gain if desired.

6. Local/Bus Selection

Selects between Local and Bus inputs for each group of speaker output pairs.

The Local/Bus input selection provides the ability to easily configure the DD-8 either as a single-zone or multi-zone amplifier. The speaker outputs are grouped in pairs A, B, C and D (channels 1-8) with a switch for each pair. For example, selecting the Bus input for speaker output pair A (channels 1 and

2)will route the input signal from the Bus input to speaker output pair A. Selecting the Local input for speaker output pair A (channels 1 and 2) will route the input signal from the Local input pair A (channels 1 and 2) to speaker output pair A.

Operation Manual

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Lexicon DD-8 manual Local Inputs, Output Level Controls, Stereo/Mono Selection, Local/Bus Selection
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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.
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