Level Trims, Phase Adjustment | Turbosound LMS-A6 instruction

user manual

LMS-A6

When this switch is up (on) the Left and Right Band 1 signals are summed together and fed in mono to both Band 1 outputs.

When the switch is down the Left and Right Band 1 signals remain independent from each other.

Level Trims

Band 1 and Band 3 have independent gain trims for fine adjustment of the system frequency response. If the internal preset band gains have been specified correctly these controls will nominally all be set central at 0dB. The +/-6dB range should be more than sufficient to balance your system in any realistic situation. Band 2 gain is taken as the reference level, and the Band 1 and Band 3 controls will be adjusted for correct spectral balance.

Phase Adjustment

In a theoretically ideal speaker design the drive units for adjacent bands would be in perfect alignment and their signals would combine to give perfect summation at the crossover point. However, realistically this seldom occurs and shifting the phase of one of the signals in the crossover region will improve the summing, and therefore the frequency response of the system. Each phase control gives nearly 180 degrees of adjustment. Used in combination with the POL Switch we can achieve continuous adjustment over a full 360 degrees.

There may be some interaction between the phase controls in each channel, especially if the MID Band, Band 2 is fairly narrow, so it is advisable to further fine tune the phase by repeating the above process a second time.

LIMITER SETTING AND OPERATION

The limiters should be set to a level that affords protection to the speaker drive units. The time constants for the limiters are set internally and are preset to be optimum for each frequency band being protected.

Limiter Threshold setting

The limiter threshold switches are located behind a security cover on the rear of the unit. Each Band has an independent 10 position switch to accurately set the threshold. The switches are calibrated in 1dB steps from +1dB (Pos0) to +10dB (Pos9)

In a high powered system where the amplifier output power is below or equal to the rating of the speakers the limiter thresholds will nominally be set to 1dB below the clipping level of the amplifier. This prevents severe clipping from driving the cones with square waves but does not

LMS-A6 user manual

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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.