Front Panel Features, Power Switch, Output Meters

Operating Manual - MFA-8000 and MFA-6000 Power Amplifier

		Channel One Output Level
-30	-27	-24 -21 -18 -15	-12	-9 -6	-3	0(Clip)
				Limit
				Thrm
				Protect
AC Power
Off		On

6.FRONT PANEL FEATURES

6.1Power Switch

When the unit is switched on there is a 2 second delay, during which time the PROTECT and LIMIT cir- cuits will activate. The load is disconnected during this power-up sequence, and the input signal is attenuated. When turning off the amplifier, the load is removed in- stantly, and the protect and limit LEDs will briefly turn on as the power supply discharges.

6.2Output Meters

Output meters display peak output voltage in dB, referenced to full output. For example, if full output in a given configuration is 800 watts, then “0” on the LED dis- play means the amp is delivering the full 800 watts to the load, “-6” would mean the output is 6dB down, or 200 watts (-6dB is half the voltage, and power = voltage squared divided by resistance ). If the line voltage sags, the output meters will track the drop and accurately pre- serve the relationship between “dB below full output” and actual clipping.

6.3Clipping Indicator

The red CLIP LED is a true clip indicator, which monitors the power supply as it is affected by the AC line voltage and the speaker load. Clipping occurs when the

signal peak levels extend beyond the available power sup- ply rails, essentially “cutting off” the crest portion of the waveform. This produces signal distortion, and can po- tentially damage drivers. The CLIP LED illuminates ex- actly at the onset of clipping.

6.4Limit Indicator

This green LED indicates that the internal elec- tronic limiter has activated, in the form of a signal at- tenuator. The intensity of the LED indicates the amount of attenuation. The limiter circuit is activated by any of the following conditions:

1.Turn-on delay for muting purposes

2.Severe output clipping

3.Excessive internal temperature (monitored at two key points per channel)

4.Abnormal high frequency/high amplitude signal

5.Excessive output current

6.Protect-mode muting

MFA-6000, MFA-8000 specifications

The Ashly MFA-8000 is a state-of-the-art audio amplifier designed for both professional and commercial audio applications. Renowned for its reliability, sound quality, and versatility, this amplifier is perfect for installation in concert halls, theaters, houses of worship, and various other venues that require robust audio performance.

One of the standout features of the MFA-8000 is its impressive power output. Delivering 800 watts per channel at 4 ohms, the amplifier is capable of driving demanding speaker systems with ease, ensuring that sound reproduction remains crisp and clear, even at high volumes. This power is complemented by a dynamic range that enhances the listening experience, making it suitable for music playback, public announcements, and other audio applications.

The MFA-8000 incorporates Class AB amplification technology, which is known for its low distortion and high linearity. This ensures that the audio signal remains faithful to the source material, providing an authentic listening experience. Additionally, the amplifier includes advanced protection circuits that safeguard against overloads, short circuits, and overheating, ensuring longevity and durability.

In terms of connectivity, the MFA-8000 offers a variety of input options, including XLR, 1/4" TRS, and RCA connectors, making it highly versatile and compatible with a wide range of audio sources. The rear panel features an intuitive layout that simplifies the connection process, allowing users to easily integrate the amplifier into existing audio setups.

Furthermore, the MFA-8000 is equipped with built-in signal processing capabilities, including adjustable crossover settings and EQ controls, allowing users to tailor the output to suit the specific acoustics of their venue. This adaptability makes it an excellent choice for installations where sound quality must be optimized for different settings or events.

Cooling is also a critical aspect of the MFA-8000’s design. The amplifier features a highly efficient cooling system with variable-speed fans that ensure the unit remains cool even during prolonged use, preventing thermal issues that could compromise performance.

Overall, the Ashly MFA-8000 is a powerful and reliable audio amplifier that combines advanced technologies with practical features, making it an ideal solution for a wide range of professional audio applications. Its robust construction, high-quality sound reproduction, and user-friendly design make it a valuable addition to any audio setup, ensuring that it meets the demands of both sound engineers and everyday users alike.

AC Power

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