ok I have an 2005 tC and I just got it and was going through some stuff and what does SRT on/off mean? and I thought they came with a stock subwoofer. Also I saw on someones that when they turn there stereo up it changes colors

 

@jared-tC The SRT function provides a wide, deep and rich quality to MP3 sound. You can turn the SRT on and off by pressing the VOLUME + or – buttons. The 2005 tC did not come with a stock subwoofer, that option became standard in 2008. A subwoofer by Bazooka is available as an accessory. The color change function is an option available on the upgrade radio for 2006 – 2007 model years.

-Paul
paul@americanpopdigital.com
I work with Scion, see full disclosure here - http://cmp.ly/4/qrbca1

 

SRT = Sound Re Touch and yes the previous comment is correct, it's a feature to bring "life" to MP3's by re-equalizing them. Since compression can make a song lifeless.