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CM-311A


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#1 Gord

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Posted 03 May 2006 - 01:51 PM

What does the EQM-311 module look like? -in other words-what is the actual size
of this unit & will it fit inside certain connectors-such as a hirosa HRS-4. or when you order a CM311-AE (for a audio technica TX), is the EQM-311 module in a plastic container in line with the hirosa connector?

Im wondering if its possible to remove the Heyco PG7 feed through connector on the CM-311A belt pack, replace it with a 3 pin connector (male/female ends)that is physically similar to the heyco (prehaps a Hirosa would work). Then if I wanted to use the CM-311A with the belt pack & 'go wired', I could do so. If I then wanted to 'go wireless', I could disconnect the mike (with the hirosa connector -for example) from the beltpack, connect the mike to a in line EQM-311-then to a Hirosa connector and into a audio technica TX. Would this idea work?
Thanks!

#2 MChapman

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Posted 08 May 2006 - 12:54 PM

Your idea would work, but it could lead to problems if the CM-311A was ever connected to the wireless "without" the EQM-311 circuit in place. The actual size of the plastic housing for the EQM-311 is approx 2"L x 9/16" W X 5/16" D. The EQM-311 circuit provides EQ and bias control for the CM-311 microphone. It will work for transmitters that provide 3-9VDC bias voltage. This is the same circuit that comes with the CM-311AE wireless versions of the microphone.

I have already had customers that put a male and female Switchcraft TA3 connector in line with the wired electronics for the mic and purchased the EQM-311 to do exactly what you are wanting to do. They did it "in-the-line" instead of messing with the electronics module.

Good luck.
<span style='color:blue'>J. Mark Chapman
Crown Application Support Technician</span>

#3 Gord

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Posted 10 May 2006 - 12:03 AM

QUOTE(MChapman @ May 8 2006, 01:54 PM)
Your idea would work, but it could lead to problems if the CM-311A was ever connected to the wireless "without" the EQM-311 circuit in place. The actual size of the plastic housing for the EQM-311 is approx 2"L x 9/16" W X 5/16" D. The EQM-311 circuit provides EQ and bias control for the CM-311 microphone. It will work for transmitters that provide 3-9VDC bias voltage. This is the same circuit that comes with the CM-311AE wireless versions of the microphone.

I have already had customers that put a male and female Switchcraft TA3 connector in line with the wired electronics for the mic and purchased the EQM-311 to do exactly what you are wanting to do. They did it "in-the-line" instead of messing with the electronics module.

Good luck.
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Thanks for the 'size'info on the EQM-311. I can't figure out why you would use a TA3 connector and the EQM-311 in series with the CM 311A electronic belt pack. The Cm 311a electronic beltpack has a XLR output & I know Audio Technica sells an adaptor cable -XLR to Audio Technica TX input. I assumed the audio output of the beltpack was eq'ed - & you could just plug it into any TX-no EQM -311 would be required.
Is it possible to purchase a EQM-311 terminated with a HRS-4 Hirose connector for a Audio Technica TX?

Since the Switchcraft TA3 connector is a 'in-line' only (male/female) -and is not available as a chassis mount type, could you suggest any supplier that would handle the Hirose HRS-4  'in line' and 'chassis mount' type connector that will enable me to bypass the CM-311 belt pack and connect to a EQM-311.

I'm also wondering why Crown does not sell the 'bare bones' CM 311 headset-terminated in a connector. Then the Connector could connect to  -a CM311A electronic beltpack-or  a EQM-311 module terminated in various connectors for different wireless Tx's. I simply don't think you should have to purchase a complete new Crown headset to go from 'wired' to 'wireless'.