The Original Classic 2204S was produced in small quantities between 1986 and 1987. Its release is often considered a bit unusual, as the standard 2204 circuit—typically labeled as a JCM800—was still in production during that time. You can clearly see cues from the earlier JMP era, where the 2204 Master Model first appeared, though this version is housed in a much smaller head shell designed to sit on top of a 1965B 4x10 cabinet.
Although the internal circuit board layout is largely identical to the 1986 JCM800 models, there does seem to be a bit of “special sauce” that sets these apart. Many players feel they sound closer to the earlier ’70s JMP 2204 amps than their mid-’80s counterparts. Simply put, this is a fantastic-sounding Marshall and a worthy addition to the collection of anyone who appreciates this legendary circuit.
Internally, the amp remains mostly untouched. The input resistor has been removed and placed directly at the V1 grid position, along with some added shielded wiring, likely done for noise reduction. The gain control bright cap is also missing, which can actually help tame the intense top end these amps sometimes exhibit. It’s difficult to say whether this change was done before or after leaving the factory. Additionally, the V1 cathode resistor appears to have been replaced with a modern equivalent—please see circuit photos for further details. The back panel is missing, and the amp shows moderate wear with a handful of small tolex tears, though it still presents very well overall. Also, two of the knobs are modern replacements.
Despite being fully functional the buyer should note this amp has long expired electrolytic capacitors. While many amps are run this way for years without issue, anyone planning on prolonged or regular gigging use would be advised to have it serviced.
