Hermansson Amplification

29/08/2025

IN MOURNING are releasing a new album today! A total of three Hermansson amps are involved! So have a listen to this awesome band and check out what the Hermansson amps sound like in a mix!

https://open.spotify.com/album/5b33s7hfvIGobl5DdFXR1x?si=8M8o5GlNSnmxq6yvg_78uQ

26/08/2025

Mesa Dual Rectifier Rev F (Serial number pre 800) rebuilt with Hermansson 4 gain stages circuit for both channels. Both channels have a lot more distortion available, increased attack, lower noise floor, better dynamic response, and a more musical EQ. I've installed my tightness control for both channels.

Only flipping the voicing switches in this clip (not turning any k***s) so you get an idea of how the switches can transform the distortion.

Extra features for this amp are:
• 3-way bright switch (both channels)
• 3 way preshape switch (both channels)
• 3-way mid boost/gain boost switch (global)
• 3-way more mids/dynamic switch (global)

Guitars straight into the amp, TC D-two in the loop, running through a Malmberg 4x12 with old greenbacks.

Please contact me if you want your Mesa Rectifier to sound like this one!

29/04/2025

Amp is sold!

Here´s a clip with three different guitars of the Hermansson rebuilt Rev G!

Some info:
Mesa Dual Rectifier Rev G rebuilt with Hermansson 4 gain stages circuit for both channels. Both channels have a lot more distortion available, increased attack, lower noise floor, better dynamic response, and a more musical EQ. I've installed my tightness control for both channels.

Extra features for this amp are:
• 3-way bright switch (both channels)
• 3 way preshape switch (both channels)
• 3-way mid boost/gain boost switch (global)
• 3-way more mids switch (global)
• Effects loop changed to serial with switched send jack (so the signal is automatically routed to the return jack from the send jack if you don’t have anything connected to the loop)
• Bias potentiometer so you don’t need to use Mesa branded tubes
This amp has the export power transformer so I will wire it for the correct voltage before sending it out.

Guitars straight into the amp, running through a Malmberg 4x12 with old greenbacks.

28/04/2025

Amp is sold!

Just finished the rebuild of this Mesa Dual Rectifier Rev G which is ready to be sent out worldwide! Please send me a PM and let me know if you interested in purchasing it, let me know where you are located and I’ll come back with a quote including shipping.

Some info:

Mesa Dual Rectifier Rev G rebuilt with Hermansson 4 gain stages circuit for both channels. Both channels have a lot more distortion available, increased attack, lower noise floor, better dynamic response, and a more musical EQ. I've installed my tightness control for both channels.

Extra features for this amp are:
• 3-way bright switch (both channels)
• 3 way preshape switch (both channels)
• 3-way mid boost/gain boost switch (global)
• 3-way more mids switch (global)
• Effects loop changed to serial with switched send jack (so the signal is automatically routed to the return jack from the send jack if you don’t have anything connected to the loop)
• Bias potentiometer so you don’t need to use Mesa branded tubes

This amp has the export power transformer so I will wire it for the correct voltage before sending it out. I will record a clip of it soon but there are plenty of clips available of previous Rev G rebuilds on my YouTube channel: http://youtube.com/c/hermanssonamplification

18/02/2025

This Mesa Dual Rectifier is modified by Hermansson Amplification.
The red and orange channels have the Hermansson 4 gain stages circuit.
The distortion is tighter, the dynamic response is increased and the overall noise floor is reduced. The layout is changed and shielded cables are installed to improve the signal-to-noise ratio. The green channel is changed to sound more open and the layout is changed for this channel as well, the push mode has better string separation and dynamic response.

Extra features for this amp are 3-way bright switches (orange + red + green channels), 3-way tight switches (orange + red channels), 3-way mid boost/gain boost switch (global for orange and red channels), 3-way more mids switch (global for orange and red channels), and a 3-way mid boost switch for the push mode (green channel).

Guitar straight into the amp, TC D-two in the loop and the Malmberg 4x12 cab is loaded with old 25W 75Hz Greenbacks.

28/01/2025

A Marshall 2203 (from 1982) which is rebuilt with the Hermansson 5 gain stage circuit. It's an all-tube distortion circuit, with no clipping diodes or transistors.

Other features:
• Tightness control
• Punch control
• 3-way preshape switch
• 3-way punch range switch
• 3-way presence range switch
• 3-way bright switch
• 3-way mid boost switch
• 3-way more mids/dark switch
• New ground layout and preamp shields

Guitars straight into the amp, TC D-two running after the amp into another another Hermansson amp for delay (100% wet), Malmberg 4x12 cabs with greenbacks.

30/12/2024

Mesa Triple Rectifier Rev G rebuilt with Hermansson 4 gain stages circuit.
Both channels have a lot more distortion available, lower noise floor, better dynamic response, and a more musical EQ. I've installed my tightness control for both channels. Extra features for this amp are 3-way bright switch (both channels), 3 way tight switch (both channels), 3-way mid boost/gain boost switch (global) and 3-way more mids switch (global).

Guitar straight into the amp, running through a Malmberg 4x12 with old greenbacks.

Please contact me if you want your Mesa Rectifier to sound like this one!

15/11/2024

MARSHALLS!
I've started doing Marshall rebuilds again and found out it was a long time ago I posted any pictures from any Marshall rebuild projects.

It's mostly the 5 gain stages rebuild (with the red turret board) but some pictures of the 3 gain stages rebuild as well.

13/11/2024

Mesa Triple Rectifier Rev G rebuilt with Hermansson 4 gain stages circuit. Both channels have a lot more distortion available, lower noise floor, better dynamic response, and a more musical EQ. I've installed my tightness control for both channels. Extra features for this amp are 3-way bright switch (both channels), 3 way tight switch (both channels), 3-way mid boost/gain boost switch (global) and 3-way more mids switch (global).

Guitar straight into the amp, running through a Malmberg 4x12 with old greenbacks.

05/10/2024

Longer clip of the Marshall 2203 with the Hermansson 5 gain stages circuit!
It's an all-tube distortion circuit, with no clipping diodes or transistors.

Other features:
• Tightness control
• Punch control
• 3-way preshape switch
• 3-way punch range switch
• 3-way presence range switch
• 3-way bright switch
• 3-way mid boost switch
• 3-way more mids
• 3-way darkness switch
• New ground layout and preamp shields
• Effects loop

Guitars straight into the amp, TC D-two in the loop, cab is loaded with V30.

A Marshall 2203 which is rebuilt with the Hermansson 5 gain stage circuit. It's an all-tube distortion circuit, with no clipping diodes or transistors.Other ...

04/10/2024

Mesa Dual Rectifier Rev F rebuilt with Hermansson 4 gain stages circuit. Both channels have a lot more distortion available, lower noise floor, better dynamic response, and a more musical EQ.
I've installed my tightness control for both channels. Extra features for this amp are 3-way bright switch (both channels), 3-way tight switch (both channels), 3-way mid boost/gain boost switch (global), and 3-way more mids switch (global).

Guitar straight into the amp, running through a 2x12 with V30.

Please contact me if you want your Mesa Rectifier to sound like this one!

Mesa Dual Rectifier Rev F rebuilt with Hermansson 4 gain stages circuit. Both channels have a lot more distortion available, lower noise floor, better dynami...

11/09/2024

A short clip showing how aggressive a Mesa Dual Rectifier can sound with the Hermansson 4 gain stages circuit. This amp also has all the available voicing switches and in this clip, both the mid boost and more mids switches are engaged.

Guitar straight into the amp, the 2x12 cab is loaded with Celestion V30.

Please contact me if you want me to install the Hermansson 4 gain stages circuit in your Mesa Rectifier!