Musicians Roadhouse

This is my first post here and I want to say 'Hello' to everyone here at this site and the Haze forum section. I wanted to share my personal experience on implementing a few mods to my Haze 40 combo. I'm sure most of you here may or may not have viewed this link to another forum that an OP was kind enough to share the mod info in detail to achieve a JCM 800 sound by changing a series of caps and resistor values.

Haze Mod

I modded my amp with the first 5 capacitor changes and didn't change the resistor values. I loved the changes made by just making these adjustments. The amp still has a clean channel and the overdrive has more mids, highs and the bottom end is no longer muddy sounding. IMHO the amp has a more convincing plexi sound as it is smooth, but has a nice crunch. Excellent for classic rock and hard rock sounds, especially with the boost on. Has anyone else tried other mods to the amp?

Sounds like a worthwhile mod, always thought the Haze never got its due. The engineer who designed the Haze is also a JCM800 player and more recently designed the JCM1.

Welcome to the Roadhouse

I did the Cap 73 snip, the 1nf mod to Cap 72. I did the Negative feedback loop resistor (R104) to 100K.
The R23 to 1.5K. These mods I kept as the amp turned into a killer Plexi-JCM800 hybrid. I did the C48 470PF and jumpered a 470PF cap over R23 also.
I didn't keep the C48 and R23+c mod as the amp became way way too bright.
The amp has a Vintage 30 in it so that may have had an effect but I love the amp the way it is now!!
It also has Svetlana winged C EL-34s and I biased them to 39 ma ea. GREAT amp with killer tone.