Possible workaround and explanation - - A small adjustment to L-R sound balance (slide towards the right) seems to reduce the booming bass. I tried this after noting an on-line article attributed to iFixit that pondered the reason for the Left speaker case to be larger than the Right speaker case. Possibly the Left case includes a sub-woofer.
The balance slider seems very sensitive, so the physical desktop environment may also affect the quality of sound output from the internal speakers. Cheers Alan On 15/02/2013, at 10:06 PM, Alan Smith <sma...@iinet.net.au> wrote: > I am enjoying my new 27" iMac 3.2GHz with Fusion Drive - but there are a few > irritating issues. > > Audio output appears to have a big bass boost or equalisation peak when > monitoring an input or playing music from iTunes. I think "audio in" has a > flat frequency response - at least a recording that I make which was > monitored with apparent boost by the internal speakers appears to be "flat" > on playback on my stereo system. This suggests the internal iMac > speakers/amplifier settings. Is there an equalisation adjustment? Is there > a published spec for the audio system? I no longer have audio test > equipment, so my assertions about quality are subjective! > > Audio also seems to take a few seconds to "warm up" from silence before it > settles down to a constant sound level. This is more difficult to > demonstrate. The input level meter seems to show signal immediately - the > lag may be in the default system output amplifier/speakers. > > (Another irritation is the aggressive spell checker/auto correction which I > will turn OFF after I send this email!) > > Regards, Alan > > > Alan Smith > Late 2012 iMac 27" Intel Quad Core i5 3.2Ghz 8GB RAM - OSX 10.8.2 > Late 2009 iMac 21.5" Intel Core 2 Duo 3.06GHz 12G RAM - OSX 10.8.2 > iPad2; ATV2; iPhone5 > > > > > > > > > > > > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > http://lists.wamug.org.au/pipermail/wamug.org.au-wamug/attachments/20130215/9a71fe12/attachment.htm > > -- The WA Macintosh User Group Mailing List -- > Archives - <http://www.wamug.org.au/mailinglist/archives.shtml> > Guidelines - <http://www.wamug.org.au/mailinglist/guidelines.shtml> > Settings & Unsubscribe - > <http://lists.wamug.org.au/listinfo/wamug.org.au-wamug> -- The WA Macintosh User Group Mailing List -- Archives - <http://www.wamug.org.au/mailinglist/archives.shtml> Guidelines - <http://www.wamug.org.au/mailinglist/guidelines.shtml> Settings & Unsubscribe - <http://lists.wamug.org.au/listinfo/wamug.org.au-wamug>
