SPA5xx low-pitched audio sound

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May 17th, 2010
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We're really puzzled with new SPA5xx. In comparision with SPA9xx ip-phones SPA5xx has low-pitched audio (opinion of different people). I'm tried with G.711a/u, G.722. Have anyone faced the issue? What options affect this behaviour?

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Patrick Born Mon, 05/17/2010 - 08:39
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  • Cisco Employee,

Hi Community,

The difference in the audio is that the SPA5xxG IP phones have enhanced acoustics to support G.722 wideband audio.

Because of the enhanced accoustics, the SPA5xxG phones produce deeper bass than some people prefer.

We're adding an option to reduce the bass, scheduled for release late July.

Once the release is available, you'll be able to do the following:

  • Disable via provisioning by changing from:




  • Or: Disable with the web-ui by changing from:

     Voice tab > User tab > Audio Volume > Deep Bass: yes


     Voice tab > User tab > Audio Volume > Deep Bass: no

    [Click image to increase size]





ikoimecs Sat, 05/29/2010 - 02:09
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Yes, I also experiencing voice quality problems on SPA 5xx IP phones. The sound is dull, without higher frequences. Tried to attach handsets from other IP phones, the quality is much better. Is it really low quality hardware or it is software problem???

Software Version:    7.4.4

Hardware Version:    1.0.0(0001)



P.S. I don't have "Deep Bass" options in the GUI !!!

David Harper Sun, 05/30/2010 - 17:42
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  • Cisco Employee,

If you look at Patrick's message a little more closely, you'll see that the firmware he is referring to is not available yet (expected in July).  Please be patient with us and we will get the firmware out as soon as we can.



ikoimecs Mon, 06/07/2010 - 05:32
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Yes, I looked to the message closely, but this is related to Bass only, i.e. lower frequencies, but I'm talking about higher frequencies !!! The problem is that there is no high frequencies at all !!! Will this new version also increase high frequencies??? Can you confirm that ???

Thank you.


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