Question about JBL SCS145.5 System

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Subwoofer makes loud popping crackle intermittently. After moving into new home, I've connected the subwoofer to the stereo. It works, but is making a popping crackle intermitetnly, which gets worse as it's left plugged in. I use a monster subwoofer cable, I'm pretty sure it's in good condition. My father is a construction elelctritian, as has checked the plugs, and they are grounded (although old, still grounded). I've tested the sub, on it's own, in other rooms, just plugged in...not connected to a stereo, on a grounded still makes the noise. I have not yet taken it apart... Any suggestions?

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Re: Subwoofer makes loud popping crackle...

Im having the exact same problem thinking it was the amp i rigged up a different driver,the amp was fine.i knew the driver wasnt gone and after some looking and testing i got it down to wire mesh(i think a dust sheild,something)inside which was slightly rubbing on the coil,it worked fine loud when it was warm but cold there was bursts of bad feed back noises.

Posted on Mar 14, 2008

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Re: Subwoofer makes loud popping crackle...

Hey erockalot...Did you ever get your problem resolved....I am having the same exact problem with my Cerwin Vega VE 28 S subwoofer.....I had the amp replaced by Cerwin Vega....and everything seemd fine again until yesterday...About 2 months after I received the new amp...the same problem started again. It has to be something with the electrical supply from my condo....I can't believe 2 Cerwin Vega amps would go bad so quickly...something has to be causing this outside of the amp itself.

Posted on Aug 30, 2007

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Re: Subwoofer makes loud popping crackle...

Could be one of the internal wires is loose, possibly where it connects to the back side of input jack.

Posted on Feb 25, 2007

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Klh powered subwoofer model ASW10-120B... when you plug in to power... it makes a loud buzzing/humming noise

I would check the caps on the power supply. They are rather large electrolytic capacitors that will look like they burst and/or leaking. When these die, the caps ground and the sub will make a loud buzzing sound. If you are handy with a soldering iron you can replace them yourself. Replace them with the same voltage or a little bigger and same with the size.

If the cap. says 16v 4700pF on it, for example, a 20v 5300pF or a 16v 6200mF cap. will work for this application.




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The first thing I would check is your interconnect to the sub. Makes sure it not loose at the connections or have electrical wires running parallel with it. I don't know if this is the case but I have see where two RCA interconnects are joined together to lengthen the run and the connector is very sensitive to interference.

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Hello. My ve 28s crackles when in standby mode, and also plays crackly bass. Please help me by telling me which component to replace within the amp. as I have no Cerwin Vega agent support here in South...

This "Crackling" Problem is common with the Cerwin Vega VE-28S Subwoofer. If your subwoofer is out of warranty, and you know how to solder, you can fix the problem by replacing a few resistors, and transistors inside the amplifier. Get the parts on ebay:

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Powered Sub Woofer emitting lound crackling noise

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I have a wharfedale svp15 passive loudspeaker. The subwoofer has started crackling and popping at low volumes and has no deep bass. At high volumes it sounds great as usual and can't tell if the crackling...

Information I find online says it an Active Subwoofer, so that introduces its own amp as a possible source of the symptom. If there is another version of this model that's passive, all the more reason to believe the amp is the problem because passive speakers don't spontaneously emit sounds.

If there was a physical reason for the crackling I would think more power would make it worse or blow it up.

A poor sub signal cable connection might explain low current anomalies if random noises are entering the signal path.

Make sure the signal, speaker and power cables are not aligned parallel and close to each other.

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I am terrible as music equipment. so here is my dummy question. I hope you can help me out. I bought a used Peveay PR Subwoofer similar to this one:

hello, first off you bought a sub designed for musicians not for use at home. tons of issues pop up how many ohms is the driver does it have a crossover what frequency is is tuned for etc...? too many issues .

if you are determined to make it work

first thing you will need a MONO amplifier or a stereo amp that can be BRIDGED to mono

then you will probably have to replace the phone jacks with speaker terminals they are available at radio shack or most car stereo installation shops.

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Crackles and pops,even in standby mode

Does it only pop and crack when its connected to your amp or receiver ? i have the same thing with my sub [its not cerwin vega] but when i turn my amp off the sub doesnt pop anymore so i think my amp is the problem not the sub , yours might be the same problem .

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The driver mounted servo unit is starting to fail.

A cap in the amplifier input section may be going bad.

You nwill need to contact Velodyne for repair of the unit.

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Cerwin Vega ve-28s subwoofer and new Cervin Vega 2-way satellites

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