Maybe? Depends what you mean. I took a Bogen CHB50 and rebuilt the power supply with new/upgraded parts, built a dedicated bias supply with an auxiliary transformer, and did some other stuff including making the I/O connectors the standard for guitar use, then slaved it into a Fryette Power Station to overdrive the power section. A friend uses that amp with a multifx unit as a backup rig now, runs it clean and gets everything from the fx.