Mackie SRM450V2 Manuale Utente

10

The SRM450v2 active speakers are designed to sit on the 

floor, a tabletop, or to fit on a standard tripod speaker stand. 
They can also be suspended by the rigging points, shown 
opposite.

You can lay the cabinet down on its side and use the 

SRM450v2 as a floor monitor. The asymmetrical trapezoidal 
shape of the cabinet provides a perfect angle for aiming up 
toward performers from the front of the stage. When used 
for monitor applications, we recommend engaging the 
LOW CUT filter.

As with any powered components, 
protect them from moisture. If you are 
setting them up outdoors, make sure 
they are under cover if you expect rain.

The SRM450v2 generates magnetic 
fields. Do not place it closer than two 
feet (0.6 meters) from any TV set or 
computer monitor. Check the screen for 
any change in color or distortion. Do not 
place any magnetic audio or video tapes 
or computer discs near the SRM450s.

The SRM450v2 active speakers are designed to sound as 

neutral as possible; that is, to reproduce the input signal as 
accurately as possible, monitoring the sound rather than 
changing it.

Room acoustics play a crucial role in the overall 

performance of a sound system. However, the wide high-
frequency dispersion of the SRM450v2 helps to minimize 
the problems that typically arise.

The SRM450v2 has a female XLR input that accepts a 

balanced or unbalanced mic- or line-level signal. When  
connecting a balanced signal, be sure it’s wired per AES 
(Audio Engineering Society) standards: 

 

        

 

Hot (+)  

 

Pin 2 

Cold (–)  

 

Pin 3 

Shield (Ground) 

Pin 1 

There is also a male XLR connector labeled THRU. This 

allows you to connect more than one SRM450v2 to the  
output of your mixing console. Simply plug the signal 
source output into the first INPUT jack, and patch that 
speaker’s THRU jack to the next INPUT jack, and so on, 
daisy-chaining multiple speakers (see diagram on page 6).

There is a limit to how many you can 
daisy-chain together. A general rule is 
to maintain a load impedance ten times 
or more than the source impedance to 
prevent excessive loading on the source. 
For example, if your mixer has an output 

impedance of 120 ohms, then you can daisy chain up to  
sixteen SRM450v2s. This is a load of 1250 ohms (SRM450v2 
input impedance=20 kohms; 16 of these in parallel=1250 
ohms).

Since microphones typically have a higher output    

impedance, you should limit daisy-chaining from a mic 
source to two SRM450v2s (see the diagram on page 7).

The THRU jack is wired straight from the INPUT    

connector — there is no electronic circuitry between — so 
the signal coming out of the THRU jack is exactly the same 
as the signal going in.