Turbosound LMS-A6 user manual Introduction, Features, Active crossovers versus passive crossovers

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user manual

LMS-A6

INTRODUCTION

The LMS-A6 is a versatile two input, six output, analogue loudspeaker management system in a 1U rack mount package that is designed for maximum sonic performance. It combines crossover and limiter functions and is uniquely configurable to custom requirements.

The LMS-A6 can be configured for the following modes of operation: stereo 3-way, stereo 2-way, mono 4-way, plus mono 2-way. The standard filter provided for the LMS-A6 is a Linkwitz Riley response based on two second order Butterworth circuits in series. The response is 24dB/octave slope with a corner frequency where the output of the filter is 6dB down from its pass band level. The use of these filter realisations has been well documented and provides the best possible phase and amplitude response for driving loudspeaker systems.

Active crossovers versus passive crossovers

Passive crossovers divide the frequency spectrum after the signal has been raised to high power levels. They are generally bulky, heavy and inefficient. Active crossovers utilise IC’s and transistors, and divide the frequency spectrum at line level immediately ahead of the amplifiers. An active crossover does the same job as a passive crossover, but with more precision, flexibility, efficiency and quality. Crossover frequencies can be readily altered to suit different driver combinations, the level balance between two or three frequency bands can easily be trimmed, and line driving, system muting, signal summing, driver equalisation and phase adjustment facilities can all be incorporated into active crossovers.

FEATURES

•Maximum sonic performance: advanced circuit design for exceptional dynamic range and sonic quality.

•Interchangeable frequency programming cards: set the required crossover frequency and slope of your loudspeaker system. These are supplied when the unit is shipped from the factory.

•A flexible 2 input, 6 output multi-mode format featuring a choice of stereo 3-way, stereo 2- way, mono 4-way plus mono 2-way crossover modes with limiters.

•High performance limiters are provided, one for each output band. Limiter threshold is set by means of 10-position switches located behind a security panel on the rear of the unit.

•Electronically balanced inputs and outputs: ensures a high level of rejection for common mode rejection signals and gives a professional connection to external equipment.

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Contents USER’S Manual LMS-A6 Loudspeaker Management SystemLMS-A6 ContentsImportant Safety Information Unpacking the LMS-A6 ThanksActive crossovers versus passive crossovers FeaturesIntroduction Front Panel Functions Rear Panel Functions Power SwitchSetting UP and Operating the LMS-A6 Connecting to the wrong voltage may damage the unit Connecting inputs and outputsPower Supply Section Connecting Remote Standby Power On Standby ModeRemote Standby Cancel Remote StandbyLimiter Setting and Operation Phase AdjustmentLimiter Threshold setting Level TrimsBand Mutes Limiter CancelOutput Level and Limiter Meter Technical Specifications Warranty

LMS-A6 specifications

Turbosound LMS-A6 is a powerful, versatile loudspeaker management system developed for professional audio applications. Designed to optimize sound quality in live performances and installations, the LMS-A6 boasts features and technologies that ensure precise audio control and exceptional sound delivery.

At the heart of the LMS-A6 is its advanced digital signal processing (DSP) capability, which enables users to control and manipulate sound with incredible accuracy. With a processing latency of less than 2 milliseconds, the system guarantees minimal delay, which is crucial for live sound environments where timing is everything. This DSP technology includes a variety of filters, crossover options, and equalization settings that allow for tailored sound optimization, ensuring that the audio output suits the specific acoustics of any venue.

One of the standout features of the LMS-A6 is its intuitive user interface. The system incorporates a comprehensive LCD display and easy-to-navigate menus, making adjustments quick and user-friendly. Users can conveniently adjust parameters like gain structure, delay, and EQ settings, enabling real-time changes during performances. The LMS-A6 supports remote control functionality thanks to its network compatibility, allowing for control via Ethernet connections—an essential feature for larger installations.

The LMS-A6 also supports extensive I/O options, including balanced XLR inputs and outputs, and digital AES/EBU connectivity. This flexibility in connectivity makes it adaptable to various setups, from small stages to large concert arenas. The ability to integrate with other audio components seamlessly is crucial for sound engineers and venue managers who require reliability and consistency in their sound systems.

Another significant characteristic of the LMS-A6 is its robust build quality. Designed for rigorous touring and installed environments, the hardware features a rugged chassis that withstands the rigors of transport and use. Additionally, the system includes comprehensive protection features such as thermal and overload protection, ensuring long-term reliability during critical performances.

In summary, the Turbosound LMS-A6 is an impressive loudspeaker management system that combines cutting-edge digital technology with ease of use and robust construction. Whether for live sound reinforcement, corporate events, or permanent installations, the LMS-A6 provides audio professionals with the tools they need to achieve exceptional sound quality and performance.
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