Question about Fender Rumble 100 Bass Guitar Amplifier

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Fender Rumble 100/115 cuts out randomly with low end notes.

I got a rumble 100 that cuts out when hitting low end notes every time, Starts out with some crackling then sound subsides. The amp stays on, red light indicator stays on and red lights at the bottom also stay on when switch is on from the back of amp. If I connect via cd input jack and play something that has low end same thing happens, only time amp performs as normal without any cut out is when I have headphones plugged into it. Any help would be greatly appreciated, thanks in advance.

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Posted on Jan 02, 2017

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SOURCE: Fender Rumble 100 210 pop noise then hum after strong low e note

I just fixed my bass amp with a similar problem last week: the problem is related to a loose connection on the PCB board (likely).
A bass amp is a rough place for circuitry: the low rumble and power shake a bass amp more than a guitar amp.
In my case, the power transistors needed to be re-soldered and then the grounding bolts and screws needed to be removed and cleaned because the connection was bad. Remember that when two different metals needed for an electric connection are toughing, there is the likelyhood that corrosion WILL happen.
My bass amp did basically the same thing yours did: sounded good at low volumes, but at higher volumes it would act up.
In short, there is nothing you can do (unless you are a repair person): you need to take it to a local music shop and have a tech fix the intermittant contact problem: someone who knows what they are doing should only take an hour at most.

Hope that helps!
-mike

Posted on Mar 31, 2009

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  • 153 Answers

SOURCE: Fender Rumble 100 210 pop noise then hum after strong low e note

Replace C21 (10uF/50V) and C38 (2.2uF/50V) and it will work great.

Posted on Apr 30, 2009

  • 5603 Answers

SOURCE: My fender rumble 100 used to cut out, now it's

Suspect the input jacks. Wiggle them and see if you get anything. They get yanked sideways because the musicians don't loop their cord thru a handle and they get yanked sideways.

Also you can try spraying sparingly CRC226 into the switches and pots. You can get it at Home Depot in the electrical department.

Posted on Oct 10, 2009

  • 1138 Answers

SOURCE: My Fender Rumble 25 makes a terrible crackling

Here is the schematic:http://www.fender.com/support/amp_schematics/pdfs/Rumble_Bass_Schematic_-B21.pdf Check the tubes to see if one is loose in its socket. Do not attempt to repair this yourself unless you have amplifier repair experience as it is easy to get a bad or life threatening shock without the correct test gear and troubleshooting procedures.I hope this helps.

Posted on Nov 26, 2009

  • 5603 Answers

SOURCE: Hello! I've bought a Fender Rumble

Try plugging another sound source into the unit. The buzz MAY be pickup of magnetic fields in your guitar pickup that clobber your notes from the strings. Bad guitar cables are another possibility. By putting clean music from say a CD player into the unit you can find where the source is. If the CD player generates the same noises, then likely you have a failure of filter caps in the amp or other component failures. Also make sure your guitar can't "hear" the amp as feedback can do strange things.

Posted on Apr 23, 2011

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Try plugging another sound source into the unit. The buzz MAY be pickup of magnetic fields in your guitar pickup that clobber your notes from the strings. Bad guitar cables are another possibility. By putting clean music from say a CD player into the unit you can find where the source is. If the CD player generates the same noises, then likely you have a failure of filter caps in the amp or other component failures. Also make sure your guitar can't "hear" the amp as feedback can do strange things.

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My Fender Rumble 25 makes a terrible crackling sound when the volume is turned up over the 4 or 5 mark. I don't think the speaker is blown as the same sound comes via the headphone socket.


Here is the schematic:http://www.fender.com/support/amp_schematics/pdfs/Rumble_Bass_Schematic_-B21.pdf Check the tubes to see if one is loose in its socket. Do not attempt to repair this yourself unless you have amplifier repair experience as it is easy to get a bad or life threatening shock without the correct test gear and troubleshooting procedures.I hope this helps.

Nov 26, 2009 | Fender Rumble 100 Bass Guitar Amplifier

1 Answer

My fender rumble 100 used to cut out, now it's


Suspect the input jacks. Wiggle them and see if you get anything. They get yanked sideways because the musicians don't loop their cord thru a handle and they get yanked sideways.

Also you can try spraying sparingly CRC226 into the switches and pots. You can get it at Home Depot in the electrical department.

Oct 08, 2009 | Fender Rumble Series 100/210 100watt 2x10...

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Not really a problem want to know if I could add a extention speaker to the fender rumble 100 combo it has not ext. speaker out looking to add two 10 inch and if so how?


Hi there. If 10" speakers are 8 or 16 ohm, parallel them. If they are 4 ohm, series them. if "External speaker" output is rated down to 4 ohm. If no external speaker jack, you'll have to tap into existing speaker jack with a "Y". Check the minimum ohm load for the amp.
Thanks
Paul

Jun 03, 2009 | Nomad Factory Fender Rumble 100 Bass Combo...

1 Answer

Fender Rumble 100 210 pop noise then hum after strong low e note


I just fixed my bass amp with a similar problem last week: the problem is related to a loose connection on the PCB board (likely).
A bass amp is a rough place for circuitry: the low rumble and power shake a bass amp more than a guitar amp.
In my case, the power transistors needed to be re-soldered and then the grounding bolts and screws needed to be removed and cleaned because the connection was bad. Remember that when two different metals needed for an electric connection are toughing, there is the likelyhood that corrosion WILL happen.
My bass amp did basically the same thing yours did: sounded good at low volumes, but at higher volumes it would act up.
In short, there is nothing you can do (unless you are a repair person): you need to take it to a local music shop and have a tech fix the intermittant contact problem: someone who knows what they are doing should only take an hour at most.

Hope that helps!
-mike

Feb 22, 2009 | Fender Rumble 100 Bass Guitar Amplifier

1 Answer

Fender Rumble 100 210 pop noise then hum after strong low e note


Replace C21 (10uF/50V) and C38 (2.2uF/50V) and it will work great.

Feb 22, 2009 | Fender Rumble Series 100/210 100watt 2x10...

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