Protection Features | Martin Audio MA200Q guide

CONTENTS

8.2Powering up – Soft start

When you power up the amplifier it takes a couple of seconds to self-check. This is known as the "soft-start" or "slow-start" sequence. The fans then blow at high speed before going into "idle" and the four bottom green LED’s illuminate to show the amplifier is operational.

8.3Input attenuators

The four input level attenuators on the front panel adjust the signal level for their respective amplifier channel’s in all modes of operation. They are calibrated in dB's to help the setting up of active loudspeaker systems.

In bridged mode, both level attenuators must be in the same position, so that the loudspeaker load will be shared equally between the channels.

8.4	Indicators
	PROTECT		PROTECT
		CLIP		CLIP
		-40dB		-40dB
		ON		ON
	CH.A	CH.B	CH.C	CH.D
	-12 -10 -7	-12 -10 -7	-12 -10 -7	-12 -10 -7
	-16	-5 -16	-5 -16	-5 -16	-5
	-20	-3 -20	-3 -20	-3	-3
	-40	-1 -40	-1 -40	-1 -40	-1
	-80 dB 0	-80 dB 0	-80 dB 0	-8 0 dB 0
		MA200Q

The yellow LED's on the front panel indicate if any protection circuits are activated. These are described on page 14.

The Clip/limit LED's indicates when the amplifier output is clipping or limiting. It has two different indication states:

•When the clip limiter is engaged it has a short time constant and illuminates briefly.

•When the clip limiter is not engaged it has an increased time constant and illuminates for a longer period.

The “- 40dB” LED’s illuminate when the output signal is greater than -40dB (with 0dB referenced to full output power). These LED’s also act as signal present indicators.

The four bottom green “ON” LED’s indicate when the power supply is operating normaly and the output circuits are receiving the correct rail voltage.

9 PROTECTION FEATURES

Each Martin Audio MA series amplifier has many advanced protection features, that will protect both the amplifier and the loudspeakers connected to it, should a fault condition arise. Under normal use these features are inaudible. All protection circuits operate independently.

9.1Output Limiter

An output limiter is included to avoid amplifier clipping. When an amplifier is severely overdriven, its output waveform is clipped (its peaks are squared off) – reducing the crest factor. In extreme cases, the waveform can approach that of a square wave. An amplifier is normally capable of producing far more power under these conditions than its normal undistorted rated output power.

The limiter works by monitoring the output and comparing the distortion produced between the input and output of the amplifier. If the distortion exceeds 1%THD for any reason (voltage or current clipping), the

Martin Audio – MA200Q Amplifier

ENGLISH

MA200Q specifications

The Martin Audio MA200Q is a versatile, high-performance amplifier designed to meet the demands of various professional audio applications. Known for its reliability and sound quality, the MA200Q is particularly suited for larger venues, touring, and installations where power and audio fidelity are paramount.

One of the standout features of the MA200Q is its four-channel architecture, which provides flexibility and efficiency. Each channel is capable of delivering 200 watts at 4 ohms, allowing users to drive multiple speakers or configurations easily. The amplifier also boasts a bridged mode, enabling users to combine channels for increased output, which is ideal for larger sound systems.

The MA200Q incorporates advanced Class D amplifier technology, which not only enhances audio quality but also improves energy efficiency. This technology significantly reduces heat generation, allowing the amplifier to operate cool and quietly, even during demanding performances. This means that users can rely on the MA200Q for extended periods without worrying about overheating or performance degradation.

Another notable feature is the comprehensive protection circuitry integrated into the amplifier. This includes short circuit protection, thermal protection, and limiting functions to safeguard both the amplifier and connected speakers from damage. The result is a robust and durable amplifier that ensures longevity in both touring and fixed installations.

In terms of connectivity, the Martin Audio MA200Q offers balanced XLR inputs and both speakON and binding post outputs, providing compatibility with a wide range of sound systems and setups. Its user-friendly design allows for easy adjustments and monitoring, with signal and clip indicators for each channel.

Moreover, the amplifier's compact and lightweight design makes it highly portable, a significant advantage for touring professionals. Even with these features, the MA200Q maintains a manageable weight, allowing for hassle-free transport and installation.

Overall, the Martin Audio MA200Q stands out in the marketplace for its combination of power, efficiency, and reliability. Whether used in live sound reinforcement, permanent installations, or corporate events, the MA200Q delivers a high-quality audio experience that professionals can trust. With features designed to enhance performance while ensuring durability, it remains a go-to choice for those seeking an exceptional amplification solution.