vibe subs - please help
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=42670
Printed Date: July 15, 2025 at 10:29 AM
Topic: vibe subs - please help
Posted By: jaanofeastlondo
Subject: vibe subs - please help
Date Posted: November 10, 2004 at 12:56 PM
hello i have 2 12inch vibe subs at 2800 watt peak a jbl amp at 520 watt the amp is giving 142rms at 2ohms the subs where playing fun with nice vibrating bass, but since yesterday, there came this rattling noise. i dont know where from, it hapened twice but went . i aint heard that noise again today i fitted my 6x9's the problem is the subs dont make that sort of bass anymore its not clean. its more thumps then vibrate does anyone have any idea what can be the problem i have tried checking the settings on the amp, but no luck is there a possibility thaat my subs could of blown PLEASE GET BACK TO ME ASAP ------------- jay
Replies:
Posted By: boxmaker85
Date Posted: November 10, 2004 at 1:26 PM
Do you have some area in your car where you can open the cabin to the trunk (asuming you have a cabin)? Like a fold down armrest to the trunk or something. The new 6x9 might be hampering the sound of the sub in the cabin. Might not be but just a thought. The subs might be bad also.
Posted By: jaanofeastlondo
Date Posted: November 10, 2004 at 1:48 PM
the 6x9s are in the side panels . no where near the sub.. the sub were working fine before any other suggestions ------------- jay
Posted By: DYohn
Date Posted: November 10, 2004 at 1:53 PM
My guess is Vibe = Lanzar = poor quality. You may have simply blown the subs or they wore out. Or the 6X9s are out of phase with the subs and causing acoustic cancellation. ------------- Support the12volt.com
Posted By: jaanofeastlondo
Date Posted: November 10, 2004 at 1:59 PM
they are vibe black air, and sounded perfect before they were only a month old how could i of blown them..there was not even that mch power going into them only 142 rms the 6 by 9s are connected directly to the system and not the amp ------------- jay
Posted By: DYohn
Date Posted: November 10, 2004 at 2:42 PM
Vibe subs (or any speaker for that matter, but it is more common with the low-end brands) can be bad out of the box. "One month to failure" is not that unusual for Lanzar gear. I'm talking about the sub and your 6X9's being out of phase with one another. It has nothing to do with where they get their power... try this: If your sub amp has a phase control, change it from 0 to 180 degrees. If not, try swapping the + and - speaker connections around. See if there is any improvement. ------------- Support the12volt.com
Posted By: jeffchilcott
Date Posted: November 10, 2004 at 3:29 PM
also you said you are only putting 14x watts to it, you are more prone to destory a sub by underpowering it then overpowering it, if you use a amp correctly with the gains and bass boost set correctly
-------------
2009 0-1000 Trunk WR 154.0DB 2009 1001+ Trunk WR
2007 USACI World Champion
2007 World Record
2006 USACI Finals 2nd Place
Posted By: jaanofeastlondo
Date Posted: November 10, 2004 at 3:36 PM
MATE thank you very much i have sorted .. i was worried my subs have blown but apparently the wires were mixed up. i changed the wires
-------------
jay
Posted By: jaanofeastlondo
Date Posted: November 10, 2004 at 3:37 PM
so what do u suggest, shall i change amp, or just sort out the right settings how many rms would be ideal for each sub? ------------- jay
Posted By: DYohn
Date Posted: November 10, 2004 at 3:58 PM
Glad you have it sorted out. If you have your amp set up properly you are fine using it. If you like the sound don't change a thing. The only way you can damage a sub by "underpowering" it is if you are trying to get more out of the amp than it is capable of producing and have it driven into clipping. There is NO WAY running a speaker with less than its rated power can damage it unless you are clipping the amplifier or feeding it a very badly clipped signal. ------------- Support the12volt.com
Posted By: jeffchilcott
Date Posted: November 10, 2004 at 4:04 PM
I try to stay withen 10% or the reccomended rms power on any sub...
-------------
2009 0-1000 Trunk WR 154.0DB 2009 1001+ Trunk WR
2007 USACI World Champion
2007 World Record
2006 USACI Finals 2nd Place
Posted By: jaanofeastlondo
Date Posted: November 10, 2004 at 4:12 PM
what do u mean by a clipped signal and what does an amp do when it clips ------------- jay
Posted By: DYohn
Date Posted: November 10, 2004 at 4:26 PM
Clipping is when an amplifier is overdriven (usually by too high an input signal - most often caused in car audio by setting input gain or bass boost too high) and it "clips" off the tops of the signal sine wave. This sends a momentary DC voltage to the speaker, which causes it to stop moving and produce more heat than it can dissipate. This can cause it to fail. Small amounts of clipping are normal and present in almost all systems. Large amounts of clipping will destroy speakers (and can cause damage to amplifiers as well.) Here's a nice description. ------------- Support the12volt.com
Posted By: jaanofeastlondo
Date Posted: November 10, 2004 at 4:30 PM
so if my subs are 350 rms each, how much watts on the rms should be going into each sub
-------------
jay
Posted By: DYohn
Date Posted: November 10, 2004 at 4:42 PM
Anything up to 350 watts RMS may be used. To be safe, do not exceed the RMS rating of the speaker. It all depends on how much you want from the system. I run a 12" sub rated for up to 500 watts RMS in my everyday car and run a 100 watt mono amplifier. It's perfect for my everyday taste. Use any amp and set it up properly and you will be fine. ------------- Support the12volt.com
|