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Power Amplifiers

Mar 22, 2012 4:18 PM, By Bennett Liles


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Crest Audio Pro LITE Series

Crest Audio Pro LITE Series

For high power into 2ohm loads from a small package, Crest Audio has introduced the Pro-LITE 3.0 and Pro-LITE 3.0 DSP in a class D design with a switch mode power supply. Each model provides 870W per channel at 4ohms and up to 3150W in bridged mode. The Pro-LITE 3.0 DSP features delays, crossovers, limiters, parametric EQ, HF driver EQ, stereo/mono modes and four parameter presets, which are assignable using the front-panel LED screen. The amplifier also includes a USB port for external preset loading and setup. Both models feature the proprietary ACL Automatic Clip Limiting circuitry. The chassis features XLR through connections, Combi-Neutrik XLR-1/4-in. input connectors and Speakon outputs. Included are two channel-independent fourth order crossovers and on the DSP model there are a high pass filter and lockable level controls.

Crown Audio Xti 6002

Crown Audio Xti 6002

The Xti 6002 from Crown Audio can put up to 6000W into a 4ohm load in bridged mono mode and to match cooling fan performance to the job, there are three user-defined fan mode controls with normal, early and full speed settings. Limiters allow full control over threshold, attack and release, whereas software enables monitoring of AC line voltage and power supply temperature. Forty-nine of the 50 presets are user definable and the backlit LCD screen on the front panel shows preset and processing status. In addition to the LCD screen other front-panel indications are included for output signal level, output clip, signal ready, temperature and power. Each channel has a loop-through input connection for linking additional amps and a USB type B port connects the amp to a HIQnet network.

Electro-voice CPS 4.10

Electro-voice CPS 4.10

Four 1000W channels of amplification in a 2RU chassis are featured by the CPS 4.10 from Electro-voice in a Class-D design with a slot for the optional RCM-810 module, allowing IRIS-Net control and monitoring. The individual channel attenuators are rear-panel mounted and in high impedance mode there is a switchable 50Hz filter. Each channel’s impedance can be selected by IRIS-Net and the unit’s protection includes thermal, overload, shorts, DC, HF, back-EMF and inrush current. The front panel includes LED level indicators for each channel along with power, standby, and IRIS-Net. The unit’s two fans run at a speed determined by the amp’s operating temperature. The amp may be run in low-impedance mode, 70V or 100V mode and a rear-panel switch can be used to set the power-on delay time.

Extron XPA 4002

Extron XPA 4002

The XPA 4002 from Extron is a 2-channel power amplifier delivering 400W RMS per channel, available in low impedance and 70V versions. The XPA 4002 is an ENERGY STAR qualified amplifier with an Extron exclusive, highly efficient, advanced Class D amplifier design. It also features patented CDRS-Class D Ripple Suppression technology that provides a smooth, clean audio waveform and an improvement in signal fidelity over conventional Class D amplifiers. The XPA 4002 is half the size of comparable amplifiers, conserving rack space and weighing only 9lbs. (4 kg). The exclusive, high efficiency design generates very little heat and allows the amplifier to be convection cooled. The new XPA 4002 model adds to Extron’s first complete family of ENERGY STAR-qualified amplifiers.

Labgruppen PLM 20000Q

Labgruppen PLM 20000Q

Designed by LabGruppen as a complete loudspeaker management system, the PLM 20000Q provides 5000W per channel into 2.3ohms to 3.3ohms in a 2RU chassis weighing only 37lbs. The 4-channel amplifier platform is combined with Lake Processing and Dante networked signal distribution on primary and secondary network connection ports. The unit allows digital output attenuation in 0.25dB steps, while the high brightness front panel LCD display teams with a silicone touchpad for front-panel display mode selection and menu navigation. The system is available with either binding posts or an “embedded patch panel” with Neutrik Speakon connectors (2 x NLT4 and 1 x NLT8). The setup provides intricate control over routing, limiting, EQ, delay and mixing with module outputs individually routable to different output channels.





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