FeelDaBass Posted November 26, 2012 Report Share Posted November 26, 2012 Hi, I recently purchased a used Rockford t0 15" off of eBay and the coils on it are black as black can be. The resistance is about normal as it is a dual 4 ohm sub and sits at 7.4 to 7.6 (I believe it was) at 8 ohms, and 2.2 at 2 ohms. The subwoofer is pretty stiff but does move without any scratchy noise/feeling. Is the sub perfectly fine? Are these coils different than others(black)? The previous owner claims that he ran the sub with a Hifonics Brutus amplifier, 1100 watts at 1 ohm, which is 800 at 2 ohms in a prefab ported box. The sub has a rated 800 watts rms. Any input at all would be greatly appreciated!! '98 Chrysler Concorde LXiPioneer DEH-80PRS (HU/processing)Rockford Fosgate T1652-S (components) for frontRockford Fosgate T1693 (6x9s) for rearRockford Fosgate T600-4 running thoseRockford Fosgate T1500-1bdCP running a Rockford Fosgate T1D215 15"in a 3.1 cu ft. net tuned to 34 hz (firing in cabin)Kicker PKD1 (0 & 4 AWG)stock 130 amp alt for now; One yellow top OptimaInstalled everything myself & built box (brother helped) Used a DD-1 to set gains. Build Log: http://www.stevemeadedesigns.com/board/topic/165894-first-build-accumulated-since-i-was-14/Just Pics: http://www.stevemeadedesigns.com/board/garage/vehicle/1463-chrysler-concorde-lxi/?tab=images Link to comment Share on other sites More sharing options...
FeelDaBass Posted November 26, 2012 Author Report Share Posted November 26, 2012 Actually, I think the 8 ohms was more like 6.8 ohms. '98 Chrysler Concorde LXiPioneer DEH-80PRS (HU/processing)Rockford Fosgate T1652-S (components) for frontRockford Fosgate T1693 (6x9s) for rearRockford Fosgate T600-4 running thoseRockford Fosgate T1500-1bdCP running a Rockford Fosgate T1D215 15"in a 3.1 cu ft. net tuned to 34 hz (firing in cabin)Kicker PKD1 (0 & 4 AWG)stock 130 amp alt for now; One yellow top OptimaInstalled everything myself & built box (brother helped) Used a DD-1 to set gains. Build Log: http://www.stevemeadedesigns.com/board/topic/165894-first-build-accumulated-since-i-was-14/Just Pics: http://www.stevemeadedesigns.com/board/garage/vehicle/1463-chrysler-concorde-lxi/?tab=images Link to comment Share on other sites More sharing options...
SnowDrifter Posted November 26, 2012 Report Share Posted November 26, 2012 Some subs have black coils. My level 5 came with black coils, and the SP audio subs have black coils too. Straight from the factory Now I'm not sure if those should be amber or not... But I'd think that if the coils each read what they are supposed to, the coil isn't "bubbly" and it doesn't scratch, you should be fine. ~~~~~~~~SAY NO TO PHOTOBUCKET~~~~~~~~ Snow's DD-1 tracks here: https://www.stevemeadedesigns.com/board/topic/167433-snows-dd-1-tracks/ My take on OFC vs CCA: https://www.stevemeadedesigns.com/board/topic/110381-things-that-piss-you-off-in-the-car-audio-world/?do=findComment&comment=2461444 Link to comment Share on other sites More sharing options...
SnowDrifter Posted November 26, 2012 Report Share Posted November 26, 2012 Measure the coils individually ~~~~~~~~SAY NO TO PHOTOBUCKET~~~~~~~~ Snow's DD-1 tracks here: https://www.stevemeadedesigns.com/board/topic/167433-snows-dd-1-tracks/ My take on OFC vs CCA: https://www.stevemeadedesigns.com/board/topic/110381-things-that-piss-you-off-in-the-car-audio-world/?do=findComment&comment=2461444 Link to comment Share on other sites More sharing options...
FeelDaBass Posted November 26, 2012 Author Report Share Posted November 26, 2012 I didn't think about measuring them individually since RF made the quick and easy parallel to series. I'll try that next weekend when I can. Thank you. '98 Chrysler Concorde LXiPioneer DEH-80PRS (HU/processing)Rockford Fosgate T1652-S (components) for frontRockford Fosgate T1693 (6x9s) for rearRockford Fosgate T600-4 running thoseRockford Fosgate T1500-1bdCP running a Rockford Fosgate T1D215 15"in a 3.1 cu ft. net tuned to 34 hz (firing in cabin)Kicker PKD1 (0 & 4 AWG)stock 130 amp alt for now; One yellow top OptimaInstalled everything myself & built box (brother helped) Used a DD-1 to set gains. Build Log: http://www.stevemeadedesigns.com/board/topic/165894-first-build-accumulated-since-i-was-14/Just Pics: http://www.stevemeadedesigns.com/board/garage/vehicle/1463-chrysler-concorde-lxi/?tab=images Link to comment Share on other sites More sharing options...
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