Question about Fender Fm25dsp 1x10' Guitar Combo Amplifier

8 Answers

Low volume on acoustic and jazz amp type

Hi, I have a FM25dsp and although it works great on clean and most of the B channel amp types, the acoustic and jazz modes are way less powerful than the others. Even with the volume on 5-6 and gain 5-6 it' still quiet enough for me to play in my bedroom cloase to the amp. For other types I have to bring the volume down to 3 and lower it on the guitar too. Not enought volume on those two amp types for even small gigs outdoor. Any idea ? Also, the manual says each amp type has two modes (acoustic lead, acoustic rythm...) how do you select one or the other ? I tried moving the selector a bit within the space marked 'acoustic' but can't hear any difference.

Thanks

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Ok, so I hope you realize the Fender FM25DSP guitar amplifier is an "entry level" NON-valve amp with a DSP chip that has model shaping tones. I am sorry but this is a toy and Fender did not spend the tens of thousands of US dollars to have built-in tones that truly 'kill". This not digital modelling like Line 6 or Fractal Audio did and so you have a problem from the start. This amp was always intended as an entry level amp for the bedroom only and never to be used on stage.
Jazz and acoustic modes have some similarities requiring mid-range boost and some rounding. Not easy to achieve with a DSP chip that costs about US$10 to manufacture. Sorry, consider using the amp for practice but look at a more serious valve amps for live on stage

Posted on Apr 26, 2017

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Hi, Your best bet is the caps. on the inside board. If you replace then you're good to go. Make sure caps are of same value. You can go abit higher on wattage but that's it... Good luck.

Posted on Nov 29, 2017

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I would try another one (same model) if it sounds the same....design flaw...... if it works better.... look for bad solder joints or like the other guy said dirty or broken switches.

Posted on Jun 22, 2017

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I agree on the capacitors, as they dry the capacitance drops and the tone rises away from center band, then audio band.
Also check switch contacts (I use Nutrol it's the best) as they can gloss over in areas

Posted on May 03, 2017

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Should have bought a Marshall and turn it up to 11.

The Amp does not have many watts. Those settings are the DSP or Digital Signal Processing modes, yes it has a computer chip in it :-(
For now just select the setting which you like the best.

I suggest you start looking in the second hand sections for an Amp with more power. You could go Valve (Tube) or Transistor but just get a simple powerful one not a fancy DSP one. For different effects feed the instrument through an effects peddle, there are millions of them to chose from.

Posted on Apr 28, 2017

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Select acoustic lead mode and don't turn your volume done on your guitar for volume acoustic rythm is usually not as loud it will drown out your followers

Posted on Apr 27, 2017

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Have to inject signal threw stages in order to isolate falt. It's either in the preamp stages or the out put stage.

Either week tube, or bias component.

Posted on Apr 25, 2017

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Hi, I think that this trouble can have some reasons.
1. Electron tubes seems to be lost emission. Replase it.
2. The capacitors, especially electrolytic, are dried and can have too high capacity resistance (Xc). Replase these components with new ones.
3. Look at the resistors in cathode and anode circuits. If they are darken it can have wrong resistance and the amplifier works in improper mode.

Posted on Apr 22, 2017

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Posted on Jan 02, 2017

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SOURCE: Fender passport model # 250 Used Only Twice!

go back in and find where the electrolitic capacitors connect to the board. They look kind of like a battery. One or both of them have broken loose from the main board, preventing any significant current from going to the output transformer, and causing overload. This is a common problem, and it does not take much rough handling to cause it.
where the break is is at the solder connection. Under a magnifying glass, the break will look like a little circle. Float fresh solder on that or any other large solder joints which may be cracked or broken.
Use standard precautions when working around high voltage.

Posted on Dec 02, 2008

PolyrhythmFX
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SOURCE: No volume.

Are the tubes bad? Do they light up? Check the tubes and install replacements if necessary. If it's a preamp tube that went bad, just replace that one tube. If a power tube went bad then replace the set of power tubes. Be sure to get a matched set when replacing power tubes, and to bias them.

Posted on Aug 11, 2009

  • 11 Answers

SOURCE: My Frontman 65R clean channel distorting somewhat

Usualy bad solderr joints on the output pcb

Posted on Dec 07, 2009

  • 94 Answers

SOURCE: volume is very low on

TRY REPLACING VOLUME CONTROL BUTTON.

Posted on Dec 22, 2010

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