20 Most Recent Marshall Amplification Marshall AS100D 2x8 Acoustic Combo Amp Questions & Answers

I have same problem. i have this map. please help me to find the problem. if you can point the area in this map that problem is from that.

this is a electronic problem. there must be a capacitor/s in the output section that's swollen and will keep giving the same problem unless its replaced.

G.

This is likely a power supply problem such as a bad filter capacitor. If the fuse blew before, probably one of the rectifiers blew due to a shorted capacitor followed by one or more diodes failing.
Take unit in for repair unless you are adept at electronics.

I had the same issue with my AS100D. When I first bought it the treble knob on the top channel was very responsive. At 10 is was unbearably "trebley". I was getting plenty of "high" treble set at 2:00, even 1:00. Then after about 6-7 mo, I started to feel it the brightness was leaving the amp. I was now putting my treble knob all the way to 10 and keeping it there, and it still wasn't enough. I had it serviced twice, no solution. Marshall got into the act and after months of going back and forth, they finally replaced the whole amp with a new one. I just got it. The treble was incredibly bright at 10, just like the former unit. But now after just a couple of days, I can already see the treble knob is not as responsive. I can't believe it! Now what?

Your amps will be fine at 50Hz.... just make sure to use a transformer type and not one of those appliance types for hair dryer... the transformer type are heavy.

Here is example: http://www.voltage-converter-transformers.com/step-up-down-transformer.html#vt1000-stepup/downtransformers

The Marshall is a super clean acoustic amp.

The POD is overloading the amp.

Try the electric guitar input and keep the gain on the amp down, keep the EQ level and use the POD and the end volume to adjust the final volume.

The normal inputs is for a low output acoustic pickup - the POD is a high output electronic source.

Start with the Marshall gains low and get the clean sound good, then work on the gritty sound.

The amp is voiced for a sweet clean sound - if you want grit'n'ball change to a 50w Marshall valve head and a 4 X 12 cabinet.

Horses for courses

https://www.dropbox.com/s/6spu98r39t2wvcr/Marshall%20G30RCD%20Schematic.pdf

First check the preamp valve in that curcuit

Hi. Doesn't look like it as the speaker is a 4 ohm one and the head needs at least 8 ohm as far as I can see.

https://www.manualslib.com/manual/99237/Marshall-Amplification-Mg15msii.html

Make sure speaker cable works and is connected then check fuses. If it has a master volume, make sure it's turned up.