Marshall JCM 800 1959 - Hermansson Amplification

[Hermansson Amplification]

I've installed a tube buffered loop and modified this Marshall JCM 800 1959. It's a smaller mod since the main PCB is still there and the power amp is almost untouched, but the change in tone, gain, dynamic response and feeling is huge!

Before mod. You can see that someone has installed a master volume, and it has been modded with an extra preamp tube at some point before but is restored to stock.

After mod. Effects loop installed and the preamp is changed pretty much along with some minor changes in the power amp and the power supply. I’m using shielded cable for the signal to avoid hiss and noise.

I'm playing a Greco EGF 1000 with Seymour duncan JB + 59 straight into the amp and running a G major II in the loop for some delays. The cab is a Malmberg 4x12 with old Celestion Greenbacks.

Please like my facebook page to keep you updated about my tube amp work: https://www.facebook.com/hermanssonamplification

 

[controlled_voltage]

sounds brilliant
i look at the guts of that amp and it looks so utilitarian and ...simple

 

[fearhk213]

Sounds great!

 

[mooncobra]

as usual, amazing!!

 

[Hermansson Amplification]

Thank you guys!

 

[lespaul6]

Fantastic! Best mod out there right now... imo

 

[steve_k]

as always....awesome work.

 

[bionicmark]

Such killer tone!

 

[tokyo tapes]

Great sounding Henric!!!

 

[Mesa\Kramer]

Amazing

 

[metalmaniac93]

Sounds killer!!!

 

[JackBootedThug]

you should move over here.....please....

 

[JiMB]

Great work and sound!

 

[Dingleberries]

I think I just touched cloth

 

[TremoJem]

Henric, I have been a fan for awhile.

This is simply amazing.

Just curious...at what volume are you playing at, certainly not bedroom, right?

 

[HilltopExplosion]

Killer amp, sweet sound, nice playing!

 

[Hermansson Amplification]

Henric, I have been a fan for awhile.

This is simply amazing.

Just curious...at what volume are you playing at, certainly not bedroom, right?

Thank you!

I have the master volume at 2/10. Loud enough to not hear the strumming from the guitar but the power amp and phase inverter is still running clean. The distortion and dynamics is in the preamp, it has a regular master volume and not a ppimv.

It's recorded with a iPhone 4S with a Tascam IM2X mic connected to the iPhone.