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7

PROTECTION

A protection circuit is built into the C00z to 

protect the high-frequency compression driver 
from excessive power. When the power to the HF 
driver approaches the maximum, the power de-
livered to the driver is momentarily reduced.

CAUTION:

 The protection 

circuit is designed to protect 

the HF driver under reasonable 

and sensible conditions. Should 

you choose to ignore the warn-

ing signs (i.e., frequent clip 

LED indications, excessive distortion), you can 

still damage the speakers in the C00z by over-

driving them past their recommended amplifier 

power-handling ratings, or past the point of am-

plifier clipping. Such damage is beyond the scope 

of the warranty.

Amplifier.Power

We give you three power-handling numbers for 

the C00z: rms (continuous), music, and peak. So 

how much power do you really need to drive the 

C00z?

The answer to that question depends on what 

type of program material you are running through 

the system and how loud it needs to be.

Some audio signals have lots of momentary 

peaks whose amplitudes extend far above the 

average overall level of the program. Percussion in-

struments are a good example of this. Other types 

of signals, like highly compressed rock music, have 

a higher average signal level with fewer peaks. 

Speech reinforcement requires less power overall, 

but involves large moment-to-moment variations 

in level.

Assuming you want to use the full capability 

of the loudspeaker, and the program contains at 

least some momentary peaks, we recommend that 

you use an amplifier that is rated at twice the con-

tinuous power rating of the loudspeaker (into 8 

ohms). For the C00z, this would be 00 watts x  

= 00 watts per channel into 8 ohms. This insures 

that the amplifier can reproduce peaks that are  dB 

higher than the continuous (rms) power-handling 

rating before clipping occurs.

Preventing.Loudspeaker.Damage

Speaking of clipping, this is likely the number 

one cause of damage to loudspeakers. Clipping oc-

curs when the signal at the output of any device 

in the system (not just the amplifier) reaches its 

maximum level. The input signal to the device 

may continue to increase, but the output simply 

stops, and is characterized by a “flat-top” ap-

pearance to the waveform when viewed on an 
oscilloscope.

Normal Sine Wave Signal 

Clipped Sine Wave Signal 

Clipping interrupts the motion of the trans-

ducer, creating distortion and excessive heat in the 

driver, which can damage it over time.

Some folks think that if they use a power am-

plifier whose power rating is below the maximum 

power-handling rating of the loudspeaker, then 

they can’t possibly damage the loudspeaker. But if 

the amplifier is driven into clipping, even a lower 

power amplifier can damage the loudspeaker.

The bottom line is that to prevent damage to 

the loudspeakers, you must have a properly oper-

ating sound system. Proper operation of a sound 

system includes being aware of the types of audio 

signals being reproduced, controlling the output 

levels accordingly, and operating all the devices in 

the system so that no clipping occurs within the 

signal chain.

RIGGING

The C00z cabinets are fitted with ten rigging 

points as shown in the diagram on the previous 

page. These are M10 inserts. M10 threaded eye-

bolts (M10 x 1.5 mm x 0 mm) are available to fit 

in these inserts (PA-A1 Eyebolts).

WARNING:

 Never attempt to 

suspend the C00z loudspeak-

ers by their handles. If you 

want to suspend them, use the 

rigging points only. Consult a 

professional rigger or structural 

engineer prior to suspending loudspeakers from a 

structure not intended for that use. Always know 

the working load limit of the structure supporting 

the loudspeaker array. Always make sure that the 

rigging hardware minimum rating is at least five 

times the actual load. 

Summary of Contents for C300z

Page 1: ...C300z TWO WaY LOUDSpeaker USer s manual C300z...

Page 2: ...rmissible noise level exposures shown in the following chart Don t forget to visit our website at www mackie com for more information about this and other Mackie products Duration Per Day Sound Level...

Page 3: ...y of high powered sound rein forcement applications ThankyouforchoosingMackie sound rein forcement loudspeakers The C300z is a portable two way loudspeaker system specifically designed to complement o...

Page 4: ...RIAL NUMBER MANUFACTURING DATE PROLONGED EXPOSURE TO HIGH SOUND PRESSURE LEVELS MAY LEAD TO PERMANENT HEARING DAMAGE PLEASE USE CARE WHEN SETTING MAXIMUM LOUDNESS DESIGNED BY MACKOIDS IN WHITINSVILLE...

Page 5: ...CONSULT USERS MANUAL FOR PROPER USE OF BUILT IN SUSPENSION HARDWARE POWERED MIXER SERIAL NUMBER MANUFACTURING DATE PROLONGED EXPOSURE TO HIGH SOUND PRESSURE LEVELS MAY LEAD TO PERMANENT HEARING DAMAG...

Page 6: ...A hollow stage can resonate at certain frequencies causing peaks and dips in the fre quency response of the room It s better to place the loudspeakers on a sturdy table or tripod stands Position the l...

Page 7: ...s rms power handling rating before clipping occurs Preventing Loudspeaker Damage Speaking of clipping this is likely the number one cause of damage to loudspeakers Clipping oc curs when the signal at...

Page 8: ...tion of our website www mackie com support where you will find lots of useful information such as FAQs documentation and user forums You may find the answer to the problem without having to send your...

Page 9: ...elines Avoid exposing the loudspeakers to moisture If they are set up outdoors be sure they are under cover if you expect rain Avoid exposure to extreme cold below freez ing temperatures If you must o...

Page 10: ...H Horizontal Coverage 90 10 1 kHz 20 kHz Vertical Coverage 45 10 2 8 kHz 20 kHz Safety Features Over Excursion Protection Second Order High Pass Filter Driver Protection Dynamicprotectionforcompressi...

Page 11: ...e units deemed by us to be under warranty Note You must have a sales receipt from an authorized Mackie dealer for your unit to be considered for warranty repair IMPORTANT Make sure that the Service Re...

Page 12: ...Red Road NE Woodinville WA 98072 USA US and Canada 800 898 3211 Europe Asia Central and South America 425 487 4333 Middle East and Africa 31 20 654 4000 Fax 425 487 4337 www mackie com E mail sales m...

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