salvation
Well-known member
I modified friend?s (Hyenik?s) RM 20 amp head.
Here is what I did:
Added 2 position CHARACTER switch, for Marshall/Fender (brit/fat) 1st tube in the amp.
This is switch, which changes first tube triode in the amp.
It switches between fender (full, fat sound )and typical Marshallesque mid emphasized character.
Fendersque setting is perfect for clean and some medium gain modules(top Boost for example),
Marshallesque setting is very good for Mid-gain modules and !PERFECT! for Higain modules.
Of course, it can be switched by taste.
I found that first triode (already built in each RM MTS amp) is the weakest part of (great) MTS idea, because (in STOCK amp)it is the same for all modules.
And what is good for clean sound isn?t allways good for overdriven sounds. I hate compromises!!
So I added this switch. It helps a lot!
I added 6 position TIGHT SWITCH placed instead of VOLUME BOOST on front panel.
Switch uses 6 different positoins, it covers all options, and works for every module I plug in.
With this switch you don?t need tight/bass switch on each module-it works in the same way!
VOLUME BOOST knob moved to back panel:
For home recording, bulit in fan can be noisy in some situations.
I added FAN on/off switch (Bogner Shiva has switchable fan , so I decided that RM 20 deserves it too.
Added 2 position classic/modern switch which changes damping of power amp.
Classic position works exactly like stock amp.
Modern setting disables DENSITY control, and adds a lot of bass and mids.
It works very well for modern Rectifier type sounds, but with Voxy modules too.
Technically it is very close to real DR power amp (in red modern mode-the most popular mode)and real AC30 power amp.
Of course-switch it by your taste :wink:
(seen on pic with rotary VOICING knob)
Internally modified GAIN BOOST option. Now it has a lot more gain in MIDS. Now it really SINGS!
I'm sure that my mods increased versatility and sound options of the RM20.
Here is what I did:
Added 2 position CHARACTER switch, for Marshall/Fender (brit/fat) 1st tube in the amp.
This is switch, which changes first tube triode in the amp.
It switches between fender (full, fat sound )and typical Marshallesque mid emphasized character.
Fendersque setting is perfect for clean and some medium gain modules(top Boost for example),
Marshallesque setting is very good for Mid-gain modules and !PERFECT! for Higain modules.
Of course, it can be switched by taste.
I found that first triode (already built in each RM MTS amp) is the weakest part of (great) MTS idea, because (in STOCK amp)it is the same for all modules.
And what is good for clean sound isn?t allways good for overdriven sounds. I hate compromises!!
So I added this switch. It helps a lot!
I added 6 position TIGHT SWITCH placed instead of VOLUME BOOST on front panel.
Switch uses 6 different positoins, it covers all options, and works for every module I plug in.
With this switch you don?t need tight/bass switch on each module-it works in the same way!
VOLUME BOOST knob moved to back panel:
For home recording, bulit in fan can be noisy in some situations.
I added FAN on/off switch (Bogner Shiva has switchable fan , so I decided that RM 20 deserves it too.
Added 2 position classic/modern switch which changes damping of power amp.
Classic position works exactly like stock amp.
Modern setting disables DENSITY control, and adds a lot of bass and mids.
It works very well for modern Rectifier type sounds, but with Voxy modules too.
Technically it is very close to real DR power amp (in red modern mode-the most popular mode)and real AC30 power amp.
Of course-switch it by your taste :wink:
(seen on pic with rotary VOICING knob)
Internally modified GAIN BOOST option. Now it has a lot more gain in MIDS. Now it really SINGS!
I'm sure that my mods increased versatility and sound options of the RM20.