Used LD-2

LD-2

The LD-2 is a compact, one rack space device designed specifically for integrating different types of Meyer Sound self-powered loudspeakers into an optimized full-range system. As a line driver, the LD-2 can connect to cable runs of up to 1000 feet without introducing instability or distortion. In addition, the LD-2 incorporates a number of switching and filter options to facilitate quick set-up and accommodate a variety of different system configurations.

Each channel of the LD-2 includes three output/control sections, designated Mid-Hi, Mid-Bass/AUX and Sub. Each section provides a gain control (-12 to +6 dB) and Mute switch with LED. In addition, the Mid-Hi section has an Array EQ filter to Minimize the low-mid rise caused by horizontal arrays of three to five MSL-4 self-powered loudspeaker systems; and Low Cut filter which performs a crossover function by either sending a full range signal to the Mid-Hi output or rolling off at 160Hz (12dB/octave). The Mid-Bass/AUX section also includes a low cut filter (160Hz, 12dB/octave). A separate Mid-Bass and Sub Crossover switch enables the LD-2 to accommodate either Mid-Bass or Subwoofers or both Mid-Bass and Subs, in the same system. With the switch engaged, the signal divides at 80Hz between the Mid-Bass and Sub outputs. With the switch out, a full range signal is sent to both sections. Polarity switches in both the Mid-Bass and Sub sections allow quick correction of any polarity reversal or allignment optimization problems. If only full range and Subwoofers are used in the main system, the Mid-Bass/AUX section is available for auxiliary systems such as front-fill, down-fill or delays.

A Master section includes a gain control, a master Mute switch with LED, and a signal presence/clip LED. The compact, single rack space cabinet is made of 16-gauge steel to provide magnetic isolation from nearby devices, EMI immunity and protection from accidental impact damage.

Used Meyer Sound

Established by John and Helen Meyer in 1979, Meyer Sound has been at the forefront of innovation in audio engineering for over two decades. From the outset, Meyer Sound looked beyond loudspeaker cabinet design to create totally integrated, systems-comprehensive solutions that encompass transducer design, signal processing, power amplification and even electroacoustic measurement systems. As a result, Meyer Sound's engineering teams have earned an enviable reputation for developing unique, innovative solutions to some of the most difficult problems confronting audio professionals. In fact, it is fundamental to John Meyer's philosophy that no component of a system should be compromised in order to compensate for variables "upstream" or "downstream." Instead, the entire system should be conceived, designed, tested, confirmed and manufactured as a whole to provide the optimum blend of audio fidelity, utility and long-term reliability.

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Used Amp Rack Units

Amp rack units refer to an assortment of rack-mounted or rack-protected PA amplification or sound reinforcement equipment that is set up to work with a mixer and loudspeakers. An amplifier, also called a power amplifier, is a basic signal processing unit that increases the power of an audio signal to make the sound from a human voice or music louder. A pro audio amplifier is used in professional sound systems as the last active component in the signal chain because it receives input from mixers or other signal processing units, increases the power of the signal, and sends the output to speakers. There are other types of amplifiers also referred to as amp rack units. A touring amplifier is simply a power amplifier that is designed to withstand conditions that touring musicians are exposed to especially being on the road most of the time. Live power amplifiers are used to support the audio demands of live performances. These amps make help create the unique experience of sound in live concerts. Some amp rack units are built by combining or adding amplifier modules with other parts. These are amplifier sub-units or parts designed to meet certain specifications. To have a whole amplification unit you may need a transformer, bridge rectifiers and filter capacitors, speaker connectors, input connectors, volume control, heatsink and a suitable rack mount case.