This is a brand new power tube 2203 100w marshall JCM800 manufactured in 1986.

In conjunction with the listing, the power tubes have been replaced with new PSVine EL34 match tubes and the bias has been adjusted.

Also, the front pot, input jack, and block capacitors have all been replaced with new ones and now sound great.

Please see the pictures for condition.

The 2203/2204 models were created in response to musicians' requests at the time for a master volume.

Models without a master volume, such as the Marshall Plexi, required considerable volume to produce distortion.

His 2203/2204's master volume allows the sound to be distorted without increasing the volume.

This change greatly increased the guitarist's sonic options.