There is a way & it's very simple to accomplish!
All you need to do is install some balancing transformers on the inputs, assuming you can solder & you have basic electronics skills? Steve McCormack has these parts available. Very likely you can also get them from Michael Percy Audio. A local musician instrument shop is another likely source if you're not seeking anything too esoteric (I wouldn't - based upon the context of your post).
All you need to do is install some balancing transformers on the inputs, assuming you can solder & you have basic electronics skills? Steve McCormack has these parts available. Very likely you can also get them from Michael Percy Audio. A local musician instrument shop is another likely source if you're not seeking anything too esoteric (I wouldn't - based upon the context of your post).