Mackie M1200/M1400 Manent hearing loss, To suffi Protectors Ciently, While this, Intense, Unit is

		Lend Me Your Ears		According to OSHA, any exposure in excess of
		Exposure to extremely high		these permissible limits could result in some hear-
		noise levels may cause per-		ing loss. To ensure against potentially dangerous
		manent hearing loss.		exposure to high sound pressure levels, it is recom-
		Individuals vary considerably		mended that all persons exposed to equipment
in susceptibility to noise-induced hearing loss, but				capable of producing high sound pressure levels
nearly everyone will lose some hearing if exposed				(such as this amplification system) use hearing
to suffi-					protectors
ciently	Duration Per Day		Sound Level dBA,	Typical	while this
intense	In Hours		Slow Response	Example	unit is in
noise for a	8		90	Duo in small club	operation.
period of	6		92		Ear plugs
	4		95	Subway Train
time. The					or protec-
	3		97
U.S.					tors in the
	2		100	Very loud classical music
Government’s					ear canals
	1.5		102
Occupa-	1		105	Lori screaming at Ron about deadlines	or over the
tional	0.5		110		ears must
Safety and	0.25 or less		115	Loudest parts at a rock concert	be worn
Health Ad-					when oper-
ministration (OSHA) has specified the permissible				ating this amplification system in order to prevent
noise level exposures shown in this chart.				a permanent hearing loss if exposure is in excess of
				the limits set forth here.

INTRODUCTION

Thank you for choosing a Mackie Designs power amplifier! We appreciate your vote of confidence for the folks in Woodinville who specialize in awesome and affordable audio. The Mackie Designs M•1200/M•1400 Power Amplifiers are designed to fulfill the amplifica- tion needs of almost any type of application. They boast a wealth of features you’d expect to pay extra for — like subwoofer filtering, con- stant directivity equalization, speaker-protecting limiter, and gobs of ultra-clean power, to name a few.

Perhaps the most important feature of the FR Series™ Power Amplifiers is the attention to detail in every aspect of the design. At Mackie, we know what it takes to be roadworthy. After all, our mixers have traveled all over the world under the worst of conditions, and we’ve applied what we’ve learned to the mechanical design of our amplifiers.

Roadworthiness is only part of the picture. We know that reliability is paramount to sound reinforcement. That’s why we use double-sided thru-hole-plated fiberglass printed circuit boards. That’s why our engineers have sub- jected the amplifier to the most rigorous and punishing tests imaginable, to fine-tune the design and extend its limits beyond those of ordinary amplifiers.

Fast Recovery — where the “FR” comes from — is more than a buzzword. It is based on real, proven design principles. The result is an

amplifier that performs better than conven- tional designs when presented with adverse conditions. One of the most difficult things for a power amplifier to handle is clipping. Con- ventional designs use lots of negative feedback to provide stability and lower distortion. When clipping occurs, this “feedback” causes high- frequency sticking, keeping the amplifier “latched” in the clipping state longer than nec- essary. This results in painfully audible distortion. Our Fast Recovery design eliminates this high-frequency sticking and allows the am- plifier to remain stable when powering highly reactive loads at high volume levels.

You may wonder why a power amp even needs an owner’s manual. After all, you just plug in a few cables and power it up. Well, it’s almost that simple. There’s just a few things that we’d like you to be aware of, and we’ll dis- cuss those right away — please see the Quick Starton the next page.

Then go ahead and read the entire manual. The M•1200/M•1400 amplifiers have a wealth of useful features, and each of them is explained in detail.

Please write your serial number here for future reference (i.e., insurance claims, tech support, return authorization, etc.):

TM

Part No. 820-062-00 Rev. A 12/96
©1996 Mackie Designs, All Rights Reserved. Printed in the U.S.A.	3