MACKIE SRM450 ACTIVE
Manual de Usuario

CONTOUR
Pushing in this switch engages a filter that provides 3 dB of boost to the low and high frequencies (below 100Hz and above 10kHz). This provides a punchy, crisp sound for most live music applications. You can experiment with this switch by leaving it out for a while, then pushing it in to determine which way sounds best for your application. It is especially useful when listening at lower volumes, as it highlights the bass like a Loudness switch, in addition to boosting the highs.

PEAK Indicator
When the signal levels at the amplifier outputs approach clipping, a soft compression circuit is activated that reduces the input signal. The PEAK LED lights whenever the compression circuit is active. At this time, the SRM450 may reach sound pressure levels of 120 dB or more. It�s okay for the PEAK indicator to blink occasionally, but if it blinks frequently or continuously, either turn down the signal level at the mixer or other signal source, or turn down the SRM450�s LEVEL control. Wear hearing protection if you are close to the SRM450 playing at high levels.

LOW CUT
Pushing in this switch engages a low-cut filter, which rolls off the low frequencies below 75Hz. This is useful for minimizing stage noise (rumble) and microphone handling noise.

INPUT Connector
This is a female XLR-type connector that accepts a balanced or unbalanced mic- or line-level signal.

LEVEL
This controls the overall signal level at the input to the built-in power amplifiers. This control ranges from off up to 40 dB of gain. Since the SRM450 incorporates Mackie�s world-class low-noise mic preamp technology, you can connect either a line-level or a microphone-level signal to the input. There is no phantom power for a microphone, so you should use a dynamic mic, or use a condensor type if it has its own battery power. Follow the Quick Start guide for setting the LEVEL control. For most applications, it will be in the NORMAL position (12 o�clock) . If you have a particularly high line-level signal connected to the SRM450, you may need to turn the control down to the LINE indication (9 o�clock). If you have a low line-level or mic-level signal connected, you may need to turn the LEVEL control up to the MIC indication (3 o�clock).

THRU Connector
This is a male XLR-type connector that produces exactly the same signal that is connected to the INPUT jack. It can be a balanced or unbalanced mic- or line-level signal. Use it to daisy-chain several active monitors together off the same signal source.

ACCESSORY Plate
This removable plate provides access to install future accessory modules. For further details of the module features and availability, please check our website: www.mackie.com.

SIGNAL PRESENT Indicator
This LED illuminates whenever there is a signal present at the INPUT connector on the rear panel. It senses the signal just prior to the LEVEL control, so even if the LEVEL control is turned down, the SIGNAL PRESENT indicator still works.
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