https://wiki.barix.com/index.php?action=history&feed=atom&title=Microphones 2026-04-25T19:42:58Z Revision history for this page on the wiki MediaWiki 1.37.1 https://wiki.barix.com/index.php?title=Microphones&diff=1261&oldid=prev 2009-11-02T05:04:37Z

<p>New page: &#039;&#039;&#039;This page informs about Microphones which can be used with Barix Annuncicom products.&#039;&#039;&#039; The Annuncicom Microphone input is suitable for typical electret microphones, but other types w...</p> <p><b>New page</b></p><div>'''This page informs about Microphones which can be used with Barix Annuncicom products.'''<br /> <br /> The Annuncicom Microphone input is suitable for typical electret microphones, but other types work as well (dynamic microphones).<br /> <br /> The input impedance depends on the configuration of the input gain, min. 8KOhm (at +43.5dB amp level), max. 94kOhm at +21dB.<br /> The input will clip at round 280mV.<br /> A third connection pin (on both 3.5mm connector as well as on the contact block) provides a &quot;bias&quot; voltage source of about 2.5V, perfectly suiting most electret microphones. If a microphone needs 12V, the voltage can typically also be taken from the Annuncicom power supply, provided it is a 12V regulated type.<br /> <br /> Please make sure that if you use an electret microphone, the source voltage is also connected. A microphone not powered by the Annuncicom must be connected to pins 1 and 3 of the contact block, pin 2 provides the source voltage. The output impedance of the mic bias source is 5kOhm.<br /> <br /> Customers report back that for security type applications, the pinhole microphone EK-23024 from Knowles works really well:<br /> [http://www.knowles.com/search/family.do?family_id=EK/EY&amp;x_sub_cat_id=8]</div>

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