
CrazyNutz
Well-known member
Kapo_Polenton":ayx07n58 said:I'm thinking the weakness really is the design at the front end of MTS. If you think about it.. you sort of have this neutral preamp section which has to pair with the preamp in the module. So it routes through first tube, into the module, back out to the phase inverter, then on to the power amp. The "punch" is the difference I notice too though I suspect that for the comparison to really be fair, you would have to open the volume on the module all the way up and get the master past 4 on the RM50 or 100 to really see. For example, the Scary module vs my Myasnikov preamp really is no comparison in clarity and punch as well. I might check out the salvation Fender and Vox offerings. I would love something AC30'ish and I can't decide whether or not to go for JF's AC30 or something Salvation. More and more though, I like the stand alone preamp idea.
I replaced the .1uf coupling cap in the input circuit on my rm100 with a SoZo nexgen .1uf, for a nice improvement, also a tung-sol 12ax7 there is a must. But yeah I fully agree with the lack of punch. You could play around with the cathode resistor, and bypass cap. Clearly 2.7k/.68uf Would be a stark improvement for any marshally style mod. You could add a switch.
There is something I notice too when I mod the MTS modules. They sound way better and clearer when they are out of the metal tray, just PCB pushed into the slot.
I suspect there is a capacitive effect that is leaching some highs with the tray.