Marshall Early JCM800 & JMP Series Filter Capacitor Replacement Set

Name: Marshall JCM800 Series EARLY 2203 and 4103 1959, 1992
Brand: Evatco
SKU: FCS-MJCM800-pk
Price: 247.7 AUD
Availability: InStock

Marshall Models: Early JCM800 2203, Early JCM800 4103, JMP 1959, and JMP 1992

SPECIFICALLY FOR EARLY 6-CAN CHASSIS LAYOUTS (1981–1987)

Default capacitors selection is based on Evatco's Recommendation - You can choose other brands via the drop down menus above

Restore original high-headroom clarity, punchy low-end response, and long-term reliability to your vintage tube amplifier with this specialized Marshall Early 2203 / 4103 / 1959 / 1992 Filter Replacement Set from EVATCO. Engineered specifically for early 100-watt JCM800 (1981–1987) and late-era JMP chassis requiring a full 6-can power supply setup, this recapping kit replaces aged, leaky factory electrolytic capacitors with premium high-voltage dual-section and bias capacitors designed to eliminate power supply hum and safeguard your transformers.

Whether you are performing routine maintenance or a full circuit restoration, sourcing high-grade, correctly rated filter capacitors is essential for maintaining dynamic responsiveness, tight bottom-end punch, and bulletproof performance in vintage Marshall circuits.

Circuit & Model Compatibility

This all-in-one capacitor replacement set is tailored specifically to fit classic 100-watt Marshall models featuring the following model designations:

Marshall JCM800 / JMP Series: Early JCM800 2203, Early JCM800 4103, JMP 1959, and JMP 1992

⚠️ Important Compatibility Warning

Please note that early-era JCM800 2203 and 4103 models (produced between 1981 and 1987) utilize a 6-can filter setup, unlike later JCM800 revisions that reduced the can count. This set is specifically designed for these early 6-can chassis. Modern reissues or later PCB-revision models will not fit this configuration. Always double-check your chassis interior prior to ordering.

How to Ensure You Are Ordering the Correct Set

Marshall amplifier circuits varied significantly across production transition eras. Before purchasing, follow this quick checklist to confirm compatibility:

Inspect the Can Capacitors: Open the chassis or inspect the top layout to confirm your amp uses six (6) clamp-mounted dual-section (50uF+50uF) high-voltage filter cans.
Verify Model Number & Era: Confirm your amplifier model is an Early JCM800 2203, Early JCM800 4103, JMP 1959, or JMP 1992.
Check Bias Circuit Values: Verify your bias supply circuit uses axial 10uF bias capacitors rated at 150V.
Need Help Confirming? Take clear photos of your amplifier's chassis interior (specifically the existing filter cans and bias circuit) and contact the EVATCO technical support team before purchasing—we are happy to verify your layout.

Parts Included in This Set & Their Circuit Roles

Default components included in this kit are listed below along with their specific function within the power supply and bias sections. We source trusted brands such as F&T / Mersen and Sprague to ensure exact physical fit and high reliability inside classic chassis layouts:

6 x F&T 50uF + 50uF - 500V Dual Electrolytic Can Capacitors: Main reservoir, screen grid, phase inverter, and preamp power supply filter cans.
2 x Sprague 10uF - 150V Axial Capacitors: Bias supply filter capacitors for stable, noise-free grid bias voltage to output valves.

Benefits of Recapping Your Vintage Marshall Amp

Eliminate Mains Hum & Noise: Original decades-old filter capacitors lose capacitance tolerance and leak DC voltage, introducing frustrating 50Hz/100Hz background hum into your signal path.
Restore Tight Low-End & Clean Headroom: Fresh filter sets stabilize high-voltage power rails, preserving tight bottom-end punch, fast transient response, and pristine headroom.
Protect Output & Power Transformers: Shorted or dried-out power supply capacitors put heavy stress on rectifiers and transformers—leading to catastrophic component failures.

Premium Components for Classic Tube Amps

Every EVATCO filter replacement set features trusted high-voltage electrolytic capacitors chosen for exact value tolerances and physical fit inside vintage Marshall chassis. Order your Early JCM800 & JMP Series filter capacitor replacement kit online today. EVATCO offers fast delivery across Australia and worldwide shipping for all your valve amplifier parts and tube amp restoration needs.

Disclaimer: MARSHALL® and specific amplifier model designations including JCM800, JMP, 2203, 4103, 1959, and 1992 are registered trademarks of Marshall Amplification PLC. EVATCO is an independent retailer of aftermarket upgrade components and restoration parts. EVATCO is not affiliated with, sponsored by, or officially connected to Marshall Amplification PLC. All trademark references are used strictly to describe product compatibility.