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Power Amplifiers

Apr 2, 2013 12:10 PM, By Mike McIntyre


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Martin Audio MA2.0

Martin Audio MA2.0

Adding to the range of Martin Audio MA series amplifiers is the new MA2.0. At 1RU and 16lbs. this amplifier offers performance in a compact, lightweight, and cost-effective package. Delivering up to 1000W per channel (4Ω) this amplifier provides the power that will meet the requirements of small to medium-sized applications such as stage monitors and installed and portable sound reinforcement. With clip limiting, DC, VHF, and thermal and AC protection built in as standard, this new addition to the MA range of amplifiers is fully featured to meet the most demanding situations. Features include advanced Class-D output stage, switch-mode power supply, low inrush current, built-in clip limiters, variable speed cooling fan, comprehensive front-panel indicators, and fully protected circuitry.

Nady Systems SPA 1400

Nady Systems SPA 1400

From Nady Systems, the SPA 1400 is a high-powered roadworthy amplifier in a compact 2RU chassis. Full operating features include user-defeatable clip limiter; switchable 30Hz low-cut filter; balanced XLR and ¼in. TRS inputs; detent volume controls; stereo (dual-channel, parallel-input, or bridged mono operating models) with selector switch; binding post and Neutrik SpeakOn outputs; and ground-lift switch. Advanced safety/reliability features include soft-start turn on; noise-free on/off; built-in DC offset; independent DC and thermal overload protection on each channel; short circuit and speaker protection; DC servo operation; and built-in current limiter. This amplifier also has parallel outputs for daisy-chaining amps and a ~115V (60Hz)/~230V (50Hz) AC select switch. For cooling, it has continuously variable speed fan with back-to-front air flow. It has output ratings of 2x 500W RMS at 4Ω and 2x 800W RMS at 2Ω, and bridge mono ratings of 1000W at 8Ω and1400W @ 4Ω.

Rane MA 4

Rane MA 4

The 100W per channel, the 4-channel Rane MA 4 amplifier achieves exceptional power density and reliability in a space saving 1RU, 19in. rackmount chassis weighing only 8lbs. A universal-voltage switching power supply provides superb power factor, reducing peak currents to 1/3 compared to non-power-factor-corrected supplies. Unique features including constant load power, built-in automatic redundancy switching, and advanced dynamics control, qualify the MA 4 for the most demanding fixed installation applications.

Stewart Audio FLX Platform

Stewart Audio FLX Platform

The FLX Platform is a new versatile 1/2RU networked amplifier from Stewart Audio. This compact package contains more than 300W of power output in various channel configurations and impedances. At the middle of the platform is a robust, internal full function DSP that is designed to solve a multitude of audio problems in just one box. The channel count varies from one to four channels, and the DSP allows further configuration via bridging, routing, EQ, filters, and limiters. The RVC and RS-232 control allow volume control from a wide range of devices. In addition, the FLX platform has an optional factory-installed Dante or CobraNet card with two channels of networked audio. Models include: FLX80-4 (80Wx4 at 4Ω), FLX80-4 70V (80Wx4 at 70V/100V), FLX160-2 70V (160Wx2 at 70V/100V), and FLX320-1 70V (320Wx1 at 70V/100V).

TOA’s AV-20D introduces a new entry in small amps for plenum use. The AV-20D features an ultra-compact design with a flexible compliment of inputs, power configuration, and control options. Carrying both UL2043 and Energy Star 2.0 certification, the AV-20D also features micro Class-D amplification, bass and treble control, input signal present indicators, and a remote volume control port.

Yamaha TXn series

Yamaha TXn series

A fusion of Yamaha power, DSP, and network technologies, the DSP-enabled TXn series provides benefits like saving rack space or eliminating cabling. Truly versatile: Not only is the TXn flexible in its I/O formats, but voltage gain/ sensitivity can be adjusted in 0.1dB steps. Detailed control and monitoring parameters not found in conventional amplifiers are now available from a remote location. A combination of analog inputs and card slot inputs provide failsafe signal redundancy. The ultra-low latency AES/EBU card’s “THRU” output is designed to send signal even in case of power failure on the amplifier. All TXn models incorporate a 24-bit ADDA 96-kHz DSP engine. In addition to basic amplifier control and status monitoring, there is ample DSP power built in to provide extensive speaker processing capabilities that can make external processors unnecessary in most applications. Onboard DSP parameters and functions can be accessed directly through the LCD and button interface provided on the front panel of the amplifier, or via Yamaha’s amplifier control software running on a computer connected via Ethernet.



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