yes it goes for pioneer as well. i buy most of my stuff from
www.sonicelectronix.com but
www.woofersetc.com has good stuff too and
www.crutchfield.com is the old workhorse of car audio. i've had good buying experiences with all of those, crutchfield especially have excellent customer service but they are practically retail prices that you could get at a "big box store", they include instructions and everything needed to hook it up (dash kit and wiring harness adapters) tho which is nice.