There are a lot of specific and sometimes strange requests on tube modifications. We can modify some Chinese products, old amps from Ex-communist countries, boutique amps or no-name made by amateurs.
Jet City JCA-50
This chinese amp was designed by Soldano and signal path evokes hot rodded Marshalls (aka Soldanos). Clients called to 4rockers with higain requests, less brittle sound. Check this video with first modification of JCA-50:
You can hear old legendary amp MV-3 from East Germany in the next video. Our mod contents super boutique parts, but also topology mod, where Matchless meets East Germany. Sounds awful for jazz players!
Rebuilding noname amplifiers
Maybe you have a noname old tube amp... not functional, demaged, but with OK mechanical parts... We can upgrade your amp to new level, insert new high quality boutique level parts. The result is perfect sound of almost new amp with lower price. Sometimes we hear here in 4rockers sentences like "Damned, this one has better sound that both my original old Marshalls from 70's!" (one client said this in August 2014)
Other boutique amp mods
A lot of amps could be repaired, modded, improved... There is no limit...
Another world are Chinese amps. Chinese engineers can calculate part values, but forgot to hear their products. We can mod these amps, but elaborateness is higher...
Ashton Viper VP100
Price of these individual mods changes piece by piece...