Those 55W are PMPO????? I was sure they were RMS. Oh shit... Are there radios more powerful than this?1khz is the frequency of the test tone. The 55 x 4 is a peak number. The rms wattage on most Sony head units is 17 watts per channel.
Sony DSX-A410BT Bluetooth Aux USB MP3 Android iPod iPhone Car Stereo RadioiPod CompatibilityFull size ClassicNano 7/6/5Touch 6/5/4/3iPhone 6S+/6S/6+/6/5S/5C/5/4S/4/3GSGeneralCEA-2006 CompliantRMS Power Output17 wattsPeak Output55 wattsRMS Power Bandwwww.bassjunkies.com
Those the testing tone frequency a detail I must care about?