Marshall 9500 Rack Mount Power Amp Filter Capacitor Replacement Set

Marshall Model: 9500 (Dual Channel / Dual Monobloc 100W+100W Rackmount Power Amp)

SPECIFICALLY FOR MARSHALL 9500 RACKMOUNT POWER AMPS

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 power amplifier with this specialized Marshall 9500 Rack Mount Power Amp Filter Replacement Set from EVATCO. Engineered specifically for the high-power dual-monobloc 9500 rack chassis, this recapping kit replaces aged, leaky factory electrolytic capacitors with premium high-voltage dual-section, single-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 rack-power circuits.

Circuit & Model Compatibility

This all-in-one capacitor replacement set is tailored specifically to fit classic Marshall rackmount power amplifiers featuring the following model designation:

• Marshall 9000 Series: 9500 Valve Rack Mount Power Amplifier

How to Ensure You Are Ordering the Correct Set

Marshall rack power amplifier circuits feature complex dual-channel power supplies. Before purchasing, follow this quick checklist to confirm compatibility:

1. Inspect the Can Capacitors: Open the chassis to confirm your unit uses four (4) dual-section (50uF+50uF) 500V filter cans.
2. Verify Secondary & Bias Capacitors: Confirm the presence of two (2) 30uF 500V capacitors, two (2) 10uF 500V capacitors, and four (4) 10uF 150V bias capacitors across the dual power supply boards.
3. Verify Model Number: Confirm your power amp is the Marshall 9500 model.
4. Need Help Confirming? Take clear photos of your amplifier's chassis interior (specifically the power supply board and filter layout) 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 Marshall 9500 power supply and bias sections. We source trusted brands such as F&T and Sprague to ensure exact physical fit and high reliability inside classic rackmount chassis layouts:

• 4 x F&T 50uF + 50uF - 500V Dual Electrolytic Can Capacitors: Main high-voltage power supply filter cans for Channel A and Channel B B+ rails.
• 2 x Sprague 30uF - 500V Axial Capacitors: Secondary power supply filter capacitors.
• 2 x F&T 10uF - 500V Axial Capacitors: High-voltage decoupling filter capacitors.
• 4 x Sprague 10uF - 150V Axial Capacitors: Bias supply filter capacitors for stable, noise-free grid bias voltage across both channels.

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 Marshall 9500 Rack Mount Power Amp 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 9000 Series and 9500 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.