Used LD-1A

LD-1A - Corporate Use. No Case. 7 Day Warranty.
LD-1A - Meyer Sound line driver. Used on corporate ev...

LD-1A

The Meyer LD-1A line driver combines functions previously accessed on the control electronics units (CEU) for externally amplified Meyer loudspeakers with new features, and locates them in a self-contained device accessible to the sound engineer during both setup and performance.

The mid-high section has two switch-activated optimized filters. The Array EQ filter Minimizes the low-mid frequency rise caused by horizontal arrays of three to five MSL-4 speakers. The Lo Cut filter performs a crossover function for the mid-high output. With the Lo Cut filter out, a full-range signal is sent to the mid-high output.

The DS-2 & Sub Crossover function is intended for the DS-2P mid-bass speaker when used with the 650-P or PSW-2 Subwoofers. With the DS-2 & Sub Crossover switch in, the Sub output receives frequencies below 80 Hz, and the DS-2 output receives frequencies above 80 Hz. When the DS-2P is used alone as a Subwoofer, or is not included in the system, the switch should be out, which sends a full-range signal to both outputs.

The mid-high, DS-2, and sub outputs each have a mute switch and a gain control that modifies their channel's Master gain level; the DS-2 and Sub outputs have a polarity toggle. The mute switches affect the mid-high, DS-2, or sub output only. For example, the mid-high output can be muted without affecting the loop, sub, or DS-2 outputs. The six auxiliary channels (3â??8) control down-fill, frontfill, and delay systems. Auxiliary channels can also be used to divide the main system into subsystems, allowing independent signal levels for speakers directed at different audience locations. Each auxiliary channel has Lo Cut and Array EQ filters, a mute switch, and gain control. The two main and six auxiliary channels are fully independent from each other.

The LD-1A occupies two rack spaces and is constructed with a 16-gauge steel chassis and 1/8-inch rack ears. This rugged design provides protection from accidental impact, magnetic isolation from nearby devices, and EMI immunity.

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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Zoom Lens - A mechanical assembly of lens elements with the capability to vary its focal length allowing for a closer or farther view of a subject, without changing perspective. Zoom lenses are often described b. Used . y the ratio of their focal lengths from longest to shortest. A 100mm to 400mm zoom may be described as a 4:1 or 4× zoom.

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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.