FAQ
Frequently Asked Questions
I just hooked up my new SMR 821, and I can’t get audio from any of the outputs.
A common cause for this is the Bus Assign switches not being assigned to any of the outputs. Make sure that the input you are using is assigned to the output bus that you have your amplifier connected to.
When I adjust the equalizer controls on the front panel, nothing happens.
Check the rear panel EQ switch. If this switch is in the OUT position, the front panel EQ is defeated.
I want to feed 2 mono music sources independently to the Left and Right outputs. How can I do this?
You can actually connect 4 mono sources, two for each output (Left, Right). By configuring the Channel 7 and 8 MODE switch- es to MONO, you can create dual 2x1 switchers. Each of the Left inputs will feed the Left output, depending on the position of the front panel Channel 7/8 select switch. The same applies to the Right inputs.
I am using the Left and Right outputs in mono for music and paging in a
By default, the SMR 821’s muting feature is active on both the Left and Right outputs. However, you can disable this feature for the Right channel by enabling the rear panel RT OUT MUTE switch. Also, the AUX output is not affected by the action of the Channel 1 mute feature.
When I connect my high quality condenser microphone, I cannot get any indication that the mic is working. I have confirmed that the gain structure and output assign functions are properly set. What is going on?
Most condenser microphones require an external phantom power source to operate. Activate the phantom power for the microphone input channel where your condenser microphone is connected. This phantom power switch is located in the BUS ASSIGN switch bank for each channel. To activate phantom power, turn down all Level Controls and then place this switch in the ON position.
I have a paging microphone connected to Channel 1 and a music source on Channel 7. I want the music to mute whenever a page is made, but it doesn’t seem to work. What am I doing wrong?
Most likely, you do not have the Channel 1 MUTE THRESHOLD control adjusted properly. This control has to be adjusted so that when a nominal level is present at the microphone, the music will mute. Care should be taken in this adjustment however, because a setting that is too low will require an excessive level at the microphone to activate the mute function. A setting that is too high could inadvertently mute ambient sounds near the microphone location.
I would like to build a remote control panel for volume control. Can I connect a remote potentiometer for each channel?
No. Only the Master Volume control is capable of external control.
I would like to link multiple mixers. If I do this, can I still use the main outputs from each mixer?
Yes. In a linked configuration, the MASTER mixer’s outputs include audio from ALL mixers in the link. However, the outputs of the Slave mixers are still active, and can be used to feed “local” circuits.
I have a CD player connected to Channel 2, instead of the stereo inputs. The sound quality is very poor. Why?
Check your wiring. Channel 2 is a single balanced input, and most CD players have dual
The sound system where my SMR 821 is installed needs to be on 24 hours a day. Is this OK?
Yes. The SMR 821 is designed to operated continuously.
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