My voltage is fine now, thanks. Talking down to someone is not relevant. Assumptions are not relevant. You did both of those things... however, the car audio related comments you made, I gave their due attention and I thank you for them. My feelings are not hurt and I am sorry if yours are. It is not my intention to bash you but rather to get unbiased opinions.
cool glad u found it.. subs/box look good.. 139 at 27hz is good on moderate power.. maybe when u go to single u can try sundown sa 12 or ab xfl tuned around 35 hz not quite as low but louder since just 1 sub..Thanks to anyone that is helping. The Vehicle is a 1995 Jeep Grand Cherokee Limited 4.0L. It is fully loaded which is why it had the "High Output" factory 136 amp alternator. This is one of the years that Chrysler, Dodge and Jeep put the voltage regulator in the computer instead of in the alternator or externally on a firewall or fender. To the others... I am not being "hard headed" or a "Know it all", I was asking opinions and was met with condescending remarks and assumptions about what I know, don't know, what I have or have not done. So if it looks like I am hard headed because I am arguing with ignorant comments then I am sorry you feel that way. Hopefully any useful information can be seen by any other readers with similar issues or questions. I am not an SPL competitor and could care less about trying to impress anyone else with how loud my woofers get. I am a person that after I trouble shoot something and get stumped, I will ASK someone who also knows what they are talking about. I may be having a brain fart, over looked something or may just not know. So getting opinions is a good thing and can be helpful. If you hit 145+ db then good for you. Not my goal, however, before I got rid of my JBL 12's I hit 139db at a friendly local meet in Columbus Ohio in this very same vehicle. No extra batteries, different amps (Alpine) and the stock alternator with the same cap I have now.
On to my issue or missed item when I trouble shot the system BEFORE I posted. It was a ground issue. The 0awg ground from the alternator case to the battery negative was loose on the alternator case from the last time I freshened up my connections. Basically the only solid ground to the battery at that point was a factory 4awg wire... and it was getting warm. I missed it because it is a pain to see/reach. Simple mistake that ANYONE could make. Voltage is stable now. I'd like to apologize if I offended anyone and I would like to squash it if you are cool with it... if not, it is what it is.
My old subs and enclosure that I built, tuned to 27.5hz roughly. It weighed over 200lbs with the subs installed which is one of the reasons I downsized to a single 12, then to a single 10. I'm just not a basshead anymore. I like bass but I am happy just hearing the music now.
I’m glad you got it figured out ..bad gnds can get you sometimes ...
I already went to a single sub. My Punch P3D4 10". The box is tuned to 42hz. The response is more narrow in the frequency range compared to the single 12" I was using. The crossover on the sub amp is all the way up to the highest frequency and my head unit is crossed over at 120hz and it still does not hit all the frequencies the punch P2D4 hit and it was crossed over at 100hz. I gave the 12 to my sister and she is rocking it now. I love the 10 but I may go back up to a single 12" or buy another 10 and build a box with 1.6 cubic feet per sub and tune it to about 36 - 38hz's.
yeah u missing the lows try 12" sa in 1.8cf depending on power or even pioneer 3003 pro (pretty loud on 1.65cfad tuned at 36hz 900rms)
He’s missing the low end from being tuned that high.
True... I looked at a few enclosures but used this one because I had it laying around. It's a solid box with a 1" baffle. It does drop off sharp below around 32 -35hz. Acoustic upright bass sounds awesome as well as Metal, Rock, Old school rap (N.W.A., 2 Live Crew), Clean music. My HU is limited on the music it can play from a USB device. The highest quality I can and do play is WAV PCM 16bit Stereo 44100Hz. I don't use the CD player. At normal volume levels that are tolerable (90 - 105db) the system is pretty clear and full. It is amazing how important the actual sub enclosure is to the overall sound of the system. When I had my JBL 12's in that huge box tuned way down low and listened to Stepenwolf's Magic Carpet Ride, the bass guitar was so loud and deep that it was almost intolerable. It was the same thing with Judas Priest's Turbo Lover... the bass guitar was so overwhelming. With the single 12 there was a good blend but it didn't drop as low... the single 10, I can barely feel the bass guitar from those two songs... I can hear it but that punch it used to have is gone.
You are the one with many years of experience. Teach us.
