Im planning on buying a SONY CDX-GT490US head unit for my car soon. Ive got the amp and subwoofer sussed out.
I do know that the SONY CDX-GT490US says that it has 2 pairs of RCA outputs. One pair for the front speakers and the other for the rear/subwoofer... Now does this mean if i take the output of one pair of RCA's (the one that says rear/subwoofer) running to the amp, will i be able to get independant subwoofer control with it.
To explain a bit further. I don't want to discover that when i turn down the bass in general on the sony gt490 it is going to affect the bass going to my subwoofer. I wanna be able to control the bass going to the subwoofer separately, is this possible??
nooooooo! don't buy that stupid sony. get an ALPINE head unit and you can control the sub, bass of the sub, and everything separately straight from the head unit 
Sony RM-X115 Car Audio IR Remote Control - suitable for many CDX models., Sony RM-X40 Car CD Remote Control CDX FAST $4 SHIPPING!!!!!!!!!!!!!!, SONY CDX-GT650UI IN-DASH CD MP3 WMA TUNER STEREO PLAYER W/ REMOTE CONTROL + USB, SONY CAR STEREO CD CHANGER REMOTE CONTROL RM-X81RF CDX-540RF CDX-555RF BATTERY, SONY CD CAR STEREO REMOTE CONTROL RM-X151 CDX-R6550 CDX-GT500 CDX-RA650 NEW, SONY CAR CD CHANGER REMOTE CONTROL RM-X58 CDX-505RF CDX-52 CDX-525RF CDX-52RF, Sony Xplod CDX-CA650X CD In Dash Receiver with remote control (in original box), SONY RM-X110 REMOTE CONTROL FOR CD DVD CHANGER CDX-M800 CDX-730 M670 M850MP M620, SONY CD CAR STEREO REMOTE CONTROL RM-X151 CDX-GT400 NEW CDX-GT300 CDX-GT300S, SONY CAR STEREO REMOTE CONTROL RM-X151 CDX-GT5416F GT5316F GT4216F GT3516F M30, Sony CDX-M60UI Marine CD, MP3, Radio Receiver w/ iPod Control + Wired Remote, Sony Remote Control CDX-CA850,CDX-CA900 and more* BNIB*, SONY REMOTE CONTROL RM-X142 CDX-M8800 + CDX-M7850 *BN*, Sony Marine CDX-M20 CD/MP3/WMA Player Front AUX Input Wireless Remote Control, Sony Car CD Remote Control CDX-L510 CDX-L350 CDX-FW500, SONY RM-X58 CAR AUDIO REMOTE CONTROL CDX-505RF CDX-52, SONY CDX-C5000R MD/CD CHANGER CONTROL/ CD PLAYER FRONT PANEL ONLY, SONY CDX-H910UI MARINE AM/FM TUNER MP3 CD BOAT STEREO RECEIVER W/ IPOD CONTROL, Sony CDX-GT565UP In-Dash Detachable Panel Car CD/MP3 Player w/Remote Control, Sony Xplod CDX-GT550UI Detachable Panel Car CD/MP3 Player w/Remote Control, SONY MARINE MP3 CD WMA PLAYER BOAT STEREO RECEIVER W/ FRONT USB & IPOD CONTROL, Sony RM-X47 Car CD Remote Control MDX-C8900 XR-C6120 C7220 C9100 CDX-6750 6850, Sony RM-X142 Remote Control for CDX-M8800 CDX-M7850, CDX-H910UI SONY MARINE BOAT CD MP3 WMA RECEIVER W/ REMOTE AND IPOD CONTROL USB, Sony CDX-GT660UP CD Car Receiver with Pandora Control, SONY CDX-M9900 BRAND NEW REMOTE CONTROL RM-X144, SONY RM-X152 REMOTE CONTROL - NEW GENUINE SONY CDX, SONY CDX-M8800 / M7850 BRAND NEW REMOTE CONTROL RM-X142, SONY RM-X154 REMOTE CONTROL - NEW GENUINE SONY CDX, Sony CDX-CA400,CD/,Receiver/CD Changer Controller, D-Bass ,50 Watts X 4,, SONY CDX-FW700 CD PLAYER AND XM CONTROLLER, Sony CDX-GT740UI MP3, WMA, AAC Receiver Front Aux, USB Input Remote Control, SONY CDX-H910UI MARINE CD/WMA/MP3 RECEIVER W/ REMOTE AND IPOD CONTROL BRAND NEW, Sony CDX-GT540UI CD/MP3 Car Audio Receiver+Front USB Input With iPod controls, SONY CDX-GT260MP IN-DASH CD/MP3 CAR RECEIVER w/iPOD CONTROL AND USB INPUT NEW, SONY RM-X112 / RM-X113 REMOTE CONTROL FOR CDX-CA850-CDX-CA900 ETC - NEW GENUINE, SONY CDX-F7500/ CDX-F7700 BRAND NEW REMOTE CONTROL RM-X140, SONY CDX-C710 AM/FM/CD/CD CONTROL STEREO FACEPLATE, Sony CDX-M301 Used LCD With Mother Board & Controls, Sony CDX-M301 Front Bezel With Vol & Seek Controls, Sony CDX-415RF 10-Disc Changer with Remote Control,CD Magazine and Cables, AS IS, Sony 10 CD CHANGER CDX-525RF In Dash Receiver controller,WIRING, SONY CD MP3 DVD Car Radio Stereo REMOTE CONTROL CDX-S2210 CDX-S2210S, SONY RM-X141A CAR STEREO REMOTE CONTROL/CDX-F7700,CDX-F7705,CDX-F7705X, SONY RM-X151 CAR STEREO REMOTE CONTROL/CDX-R6550 CDX-GT500 CDX-RA650, SONY CD MP3 DVD Car Radio Stereo REMOTE CONTROL CDX-M60UI CDX-M750 Xplod, PAC SWI-X STEERING WHEEL CONTROL FOR SONY CDX-GT930UI, PAC SWI-X STEERING WHEEL CONTROL FOR SONY CDX-R30M, PAC SWI-X STEERING WHEEL CONTROL FOR SONY CDX-M7815X, PAC SWI-X STEERING WHEEL CONTROL FOR SONY CDX-M9905X,
