Okay, so I’ve been messing around with guitar amps and pedals for a while, and I recently got my hands on a Marshall Mosfet 100 head. I’d heard mixed things about these, some people swear by them, others say they’re trash. I wanted to see for myself, so I grabbed one used.

Getting Started
First thing I did was plug it in and see what it sounded like straight out of the box. I used my trusty old Les Paul, nothing fancy. The clean channel was surprisingly decent. It wasn’t super sparkly or anything, but it was warm and took pedals really well. I threw my favorite overdrive in front of it, and it sounded pretty darn good.
Experimenting with the Gain
The gain channel, though… that’s where things got interesting. This thing has a ton of gain on tap. Like, way more than I’d usually use. I spent a good hour just messing with the gain knob, the master volume, and the EQ to see what kinds of sounds I could get.
- Low Gain: I found that keeping the gain low, around 3 or 4, gave me a nice, classic rock crunch. Think AC/DC, that kind of vibe.
- Medium Gain: Pushing it up to 6 or 7 got me into hard rock territory. It started to sound a bit more modern, but still had that Marshall character.
- High Gain: Honestly, anything past 8 was just too much for me. It got really fizzy and compressed. Maybe useful for some super heavy stuff, but not my style.
Tweaking the EQ
The EQ on this amp is pretty powerful. I noticed that even small adjustments to the bass, middle, and treble knobs made a big difference in the overall sound.
- Bass: Added a good amount of thump, but I had to be careful not to make it too muddy.
- Mids: This is where the amp really lives, in my opinion. Boosting the mids gave it that classic Marshall “roar.”
- Treble: Could get a bit harsh if I cranked it too much, but it definitely helped cut through the mix.
The Verdict(So Far!)
So, after spending a few days with the Marshall Mosfet 100, what do I think? It’s definitely a solid amp, especially for the price.
It’s not perfect, but it’s got a lot of potential. The clean channel is a great platform for pedals, and the gain channel can get you a wide range of tones, from classic rock to something approaching metal, if that is your need.

But,I wouldn’t go all out on that dial! It’s been a fun one to play with so far.
Okay, so I’ve been messing around with guitar amps and pedals for a while, and I recently got my hands on a Marshall Mosfet 100 head. I’d heard mixed things about these, some people swear by them, others say they’re trash. I wanted to see for myself, so I grabbed one used.

Getting Started
First thing I did was plug it in and see what it sounded like straight out of the box. I used my trusty old Les Paul, nothing fancy. The clean channel was surprisingly decent. It wasn’t super sparkly or anything, but it was warm and took pedals really well. I threw my favorite overdrive in front of it, and it sounded pretty darn good.
Experimenting with the Gain
The gain channel, though… that’s where things got interesting. This thing has a ton of gain on tap. Like, way more than I’d usually use. I spent a good hour just messing with the gain knob, the master volume, and the EQ to see what kinds of sounds I could get.
- Low Gain: I found that keeping the gain low, around 3 or 4, gave me a nice, classic rock crunch. Think AC/DC, that kind of vibe.
- Medium Gain: Pushing it up to 6 or 7 got me into hard rock territory. It started to sound a bit more modern, but still had that Marshall character.
- High Gain: Honestly, anything past 8 was just too much for me. It got really fizzy and compressed. Maybe useful for some super heavy stuff, but not my style.
Tweaking the EQ
The EQ on this amp is pretty powerful. I noticed that even small adjustments to the bass, middle, and treble knobs made a big difference in the overall sound.
- Bass: Added a good amount of thump, but I had to be careful not to make it too muddy.
- Mids: This is where the amp really lives, in my opinion. Boosting the mids gave it that classic Marshall “roar.”
- Treble: Could get a bit harsh if I cranked it too much, but it definitely helped cut through the mix.
The Verdict(So Far!)
So, after spending a few days with the Marshall Mosfet 100, what do I think? It’s definitely a solid amp, especially for the price.
It’s not perfect, but it’s got a lot of potential. The clean channel is a great platform for pedals, and the gain channel can get you a wide range of tones, from classic rock to something approaching metal, if that is your need.

But,I wouldn’t go all out on that dial! It’s been a fun one to play with so far.