This Genuine Marshall Impedance Selector Switch (Part# SWTM-00014) is the factory-original rotary switch used on many Marshall heads and cabinets to select between 4, 8, or 16 ohm output impedances. Whether you’re replacing a worn-out switch or restoring a classic Marshall amp, this part ensures proper speaker matching and safe operation of your tube amp’s output transformer.

Key Features:

✔ Genuine OEM Marshall Part – Factory-correct rotary switch
✔ Selectable Impedance Settings – 4Ω / 8Ω / 16Ω
✔ Smooth, Positive Detents – Ensures solid selection and reliability
✔ Essential for Safe Amp Operation – Protects output transformer by matching speaker loads correctly

Commonly Used In:

✔ Reissue Marshall JCM800, JCM900, and JCM2000 Heads
✔ DSL and TSL Series
✔ Vintage Reissue Models
✔ Handwired and Custom Shop Units
(Always verify your model’s part number before ordering)

Specifications:

• Part Number: SWTM-00014

• Impedance Positions: 4 / 8 / 16 Ohms

• Mounting Style: Panel-mount rotary with bushing

• Connection: Solder terminals

Important Notes:

⚠ Professional Installation Recommended – This part requires soldering and proper electrical handling
⚠ Not a Drop-in Replacement for Vintage Models
⚠ Non-Refundable – Due to its nature as an electrical service part
⚠ Pre-Order Info – If not in stock, please contact us for lead times

Why Choose British Audio?

At British Audio, we’re Nashville’s trusted source for Marshall parts and service. As an authorized Marshall service provider, we supply only factory-approved components for your repair and restoration needs.

Restore reliable speaker matching—order your Genuine Marshall Impedance Selector Switch today!