Simply, I wish to put some 6550's in my JCM800 2203. Is there any possibilty of achieving this, if so How?
Hello,
The 2203 can be fitted with 6550`s but the bias circuitary would need component changes to achieve the correct bias. This would need to be carried out by a qualified engineer, if you would like us to quote the work for you then please contact jgreen@marshallamps.com.